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-rw-r--r--compiler/rustc_thread_pool/Cargo.toml1
-rw-r--r--library/alloc/src/collections/btree/map.rs2
-rw-r--r--library/core/src/intrinsics/mod.rs8
-rw-r--r--library/core/src/num/int_macros.rs12
-rw-r--r--library/core/src/num/nonzero.rs8
-rw-r--r--library/core/src/num/uint_macros.rs12
-rw-r--r--library/coretests/tests/nonzero.rs20
-rw-r--r--library/coretests/tests/num/int_macros.rs12
-rw-r--r--library/coretests/tests/num/uint_macros.rs12
-rw-r--r--library/std/src/sys/args/common.rs2
-rw-r--r--src/doc/rustc-dev-guide/src/stability.md3
-rw-r--r--src/librustdoc/html/static/css/rustdoc.css4
-rw-r--r--src/tools/compiletest/src/runtest.rs2
-rw-r--r--src/tools/run-make-support/src/diff/mod.rs11
-rw-r--r--tests/rustdoc-gui/notable-trait.goml4
-rw-r--r--tests/rustdoc-gui/src/test_docs/lib.rs14
-rw-r--r--tests/rustdoc-gui/tooltips.goml15
-rw-r--r--tests/ui/abi/extern-c-two-doubles-x86_64-5754.rs (renamed from tests/ui/issues/issue-5754.rs)2
-rw-r--r--tests/ui/array-slice-vec/fixed-size-arrays-zero-size-types-8898.rs (renamed from tests/ui/issues/issue-8898.rs)1
-rw-r--r--tests/ui/associated-consts/trait-associated-const-usage-43483.rs (renamed from tests/ui/issues/issue-43483.rs)1
-rw-r--r--tests/ui/associated-types/recursive-associated-type-overflow-21946.rs (renamed from tests/ui/issues/issue-21946.rs)1
-rw-r--r--tests/ui/associated-types/recursive-associated-type-overflow-21946.stderr (renamed from tests/ui/issues/issue-21946.stderr)2
-rw-r--r--tests/ui/borrowck/mismatched-pointer-type-in-self-7061.rs (renamed from tests/ui/issues/issue-7061.rs)1
-rw-r--r--tests/ui/borrowck/mismatched-pointer-type-in-self-7061.stderr (renamed from tests/ui/issues/issue-7061.stderr)2
-rw-r--r--tests/ui/borrowck/region-checker-map-closure-13665.rs (renamed from tests/ui/issues/issue-13665.rs)1
-rw-r--r--tests/ui/closures/aliasability-violation-with-closure-21600.rs (renamed from tests/ui/issues/issue-21600.rs)1
-rw-r--r--tests/ui/closures/aliasability-violation-with-closure-21600.stderr (renamed from tests/ui/issues/issue-21600.stderr)4
-rw-r--r--tests/ui/consts/const-pattern-rewrite-error-32086.rs (renamed from tests/ui/issues/issue-32086.rs)1
-rw-r--r--tests/ui/consts/const-pattern-rewrite-error-32086.stderr (renamed from tests/ui/issues/issue-32086.stderr)4
-rw-r--r--tests/ui/cross-crate/auxiliary/aux-5521.rs (renamed from tests/ui/issues/auxiliary/issue-5521.rs)0
-rw-r--r--tests/ui/cross-crate/cross-crate-map-usage-5521.rs (renamed from tests/ui/issues/issue-5521.rs)7
-rw-r--r--tests/ui/did_you_mean/typo-suggestion-improvement-46332.rs (renamed from tests/ui/issues/issue-46332.rs)1
-rw-r--r--tests/ui/did_you_mean/typo-suggestion-improvement-46332.stderr (renamed from tests/ui/issues/issue-46332.stderr)2
-rw-r--r--tests/ui/drop/destructor-run-for-let-ignore-6892.rs (renamed from tests/ui/issues/issue-6892.rs)1
-rw-r--r--tests/ui/drop/drop-count-assertion-16151.rs (renamed from tests/ui/issues/issue-16151.rs)1
-rw-r--r--tests/ui/dyn-compatibility/dyn-compatible-trait-implementation-20939.rs (renamed from tests/ui/issues/issue-20939.rs)1
-rw-r--r--tests/ui/dyn-compatibility/dyn-compatible-trait-implementation-20939.stderr (renamed from tests/ui/issues/issue-20939.stderr)2
-rw-r--r--tests/ui/generics/unused-type-parameter-regression-36075.rs (renamed from tests/ui/issues/issue-36075.rs)1
-rw-r--r--tests/ui/issues/issue-9188.rs11
-rw-r--r--tests/ui/iterators/fold-iterator-error-23966.rs (renamed from tests/ui/issues/issue-23966.rs)1
-rw-r--r--tests/ui/iterators/fold-iterator-error-23966.stderr (renamed from tests/ui/issues/issue-23966.stderr)2
-rw-r--r--tests/ui/lifetimes/lifetime-inference-miss-15735.rs (renamed from tests/ui/issues/issue-15735.rs)1
-rw-r--r--tests/ui/loops/infinite-loop-simplify-cfg-75704.rs (renamed from tests/ui/issues/issue-75704.rs)1
-rw-r--r--tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.fixed (renamed from tests/ui/issues/issue-19100.fixed)1
-rw-r--r--tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.rs (renamed from tests/ui/issues/issue-19100.rs)1
-rw-r--r--tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.stderr (renamed from tests/ui/issues/issue-19100.stderr)4
-rw-r--r--tests/ui/methods/trait-method-resolution-over-inherent-22684.rs (renamed from tests/ui/issues/issue-22684.rs)1
-rw-r--r--tests/ui/methods/trait-method-resolution-over-inherent-22684.stderr (renamed from tests/ui/issues/issue-22684.stderr)2
-rw-r--r--tests/ui/mismatched_types/float-integer-subtraction-error-24352.rs (renamed from tests/ui/issues/issue-24352.rs)1
-rw-r--r--tests/ui/mismatched_types/float-integer-subtraction-error-24352.stderr (renamed from tests/ui/issues/issue-24352.stderr)2
-rw-r--r--tests/ui/mismatched_types/for-loop-in-vec-type-mismatchrs-50585.rs (renamed from tests/ui/issues/issue-50585.rs)1
-rw-r--r--tests/ui/mismatched_types/for-loop-in-vec-type-mismatchrs-50585.stderr (renamed from tests/ui/issues/issue-50585.stderr)2
-rw-r--r--tests/ui/mismatched_types/starts-with-stringify-type-mismatch-48364.rs (renamed from tests/ui/issues/issue-48364.rs)1
-rw-r--r--tests/ui/mismatched_types/starts-with-stringify-type-mismatch-48364.stderr (renamed from tests/ui/issues/issue-48364.stderr)2
-rw-r--r--tests/ui/modules/circular-module-imports-32797.rs (renamed from tests/ui/issues/issue-32797.rs)1
-rw-r--r--tests/ui/moves/matching-partially-moved-value-17385.rs (renamed from tests/ui/issues/issue-17385.rs)1
-rw-r--r--tests/ui/moves/matching-partially-moved-value-17385.stderr (renamed from tests/ui/issues/issue-17385.stderr)8
-rw-r--r--tests/ui/numbers-arithmetic/f32-literal-rounding-32805.rs (renamed from tests/ui/issues/issue-32805.rs)1
-rw-r--r--tests/ui/privacy/private-field-access-violation-3763.rs (renamed from tests/ui/issues/issue-3763.rs)1
-rw-r--r--tests/ui/privacy/private-field-access-violation-3763.stderr (renamed from tests/ui/issues/issue-3763.stderr)10
-rw-r--r--tests/ui/resolve/cannot-find-value-in-scope-22811.rs (renamed from tests/ui/issues/issue-2281-part1.rs)1
-rw-r--r--tests/ui/resolve/cannot-find-value-in-scope-22811.stderr (renamed from tests/ui/issues/issue-2281-part1.stderr)2
-rw-r--r--tests/ui/resolve/unresolved-module-error-33293.rs (renamed from tests/ui/issues/issue-33293.rs)1
-rw-r--r--tests/ui/resolve/unresolved-module-error-33293.stderr (renamed from tests/ui/issues/issue-33293.stderr)2
-rw-r--r--tests/ui/structs/tuple-struct-field-naming-47073.rs (renamed from tests/ui/issues/issue-47073-zero-padded-tuple-struct-indices.rs)1
-rw-r--r--tests/ui/structs/tuple-struct-field-naming-47073.stderr (renamed from tests/ui/issues/issue-47073-zero-padded-tuple-struct-indices.stderr)4
-rw-r--r--tests/ui/symbol-names/auxiliary/aux-9188.rs (renamed from tests/ui/issues/auxiliary/issue-9188.rs)0
-rw-r--r--tests/ui/symbol-names/same-symbol-name-for-inner-statics-9188.rs11
-rw-r--r--tests/ui/trait-bounds/trait-selection-overflow-prevention-72839.rs (renamed from tests/ui/issues/issue-72839-error-overflow.rs)1
-rw-r--r--tests/ui/trait-bounds/trait-selection-overflow-prevention-72839.stderr (renamed from tests/ui/issues/issue-72839-error-overflow.stderr)2
-rw-r--r--tests/ui/trait-objects/trait-object-lifetime-conversion-47638.rs (renamed from tests/ui/issues/issue-47638.rs)1
-rw-r--r--tests/ui/traits/const-traits/const-closure-issue-125866-error.rs24
-rw-r--r--tests/ui/traits/const-traits/const-closure-issue-125866-error.stderr11
-rw-r--r--tests/ui/traits/const-traits/const-closure-issue-125866-pass.rs25
-rw-r--r--tests/ui/traits/const-traits/const-fn-trait-bound-issue-104314.rs13
-rw-r--r--tests/ui/traits/trait-impl-overflow-with-where-clause-20413.rs (renamed from tests/ui/issues/issue-20413.rs)1
-rw-r--r--tests/ui/traits/trait-impl-overflow-with-where-clause-20413.stderr (renamed from tests/ui/issues/issue-20413.stderr)24
-rw-r--r--tests/ui/try-trait/incompatible-types-with-question-mark-51632.rs (renamed from tests/ui/issues/issue-51632-try-desugar-incompatible-types.rs)1
-rw-r--r--tests/ui/try-trait/incompatible-types-with-question-mark-51632.stderr (renamed from tests/ui/issues/issue-51632-try-desugar-incompatible-types.stderr)2
-rw-r--r--triagebot.toml5
80 files changed, 260 insertions, 107 deletions
diff --git a/compiler/rustc_thread_pool/Cargo.toml b/compiler/rustc_thread_pool/Cargo.toml
index b0194834264..c92984470b7 100644
--- a/compiler/rustc_thread_pool/Cargo.toml
+++ b/compiler/rustc_thread_pool/Cargo.toml
@@ -7,7 +7,6 @@ authors = [
 ]
 description = "Core APIs for Rayon - fork for rustc"
 license = "MIT OR Apache-2.0"
-rust-version = "1.63"
 edition = "2021"
 readme = "README.md"
 keywords = ["parallel", "thread", "concurrency", "join", "performance"]
diff --git a/library/alloc/src/collections/btree/map.rs b/library/alloc/src/collections/btree/map.rs
index 17c16e4aaff..acbbb6df9a5 100644
--- a/library/alloc/src/collections/btree/map.rs
+++ b/library/alloc/src/collections/btree/map.rs
@@ -382,6 +382,7 @@ impl<'a, K: 'a, V: 'a> Default for Iter<'a, K, V> {
 /// documentation for more.
 ///
 /// [`iter_mut`]: BTreeMap::iter_mut
+#[must_use = "iterators are lazy and do nothing unless consumed"]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct IterMut<'a, K: 'a, V: 'a> {
     range: LazyLeafRange<marker::ValMut<'a>, K, V>,
@@ -391,7 +392,6 @@ pub struct IterMut<'a, K: 'a, V: 'a> {
     _marker: PhantomData<&'a mut (K, V)>,
 }
 
-#[must_use = "iterators are lazy and do nothing unless consumed"]
 #[stable(feature = "collection_debug", since = "1.17.0")]
 impl<K: fmt::Debug, V: fmt::Debug> fmt::Debug for IterMut<'_, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
diff --git a/library/core/src/intrinsics/mod.rs b/library/core/src/intrinsics/mod.rs
index 106cc725fee..c6b92df5fe1 100644
--- a/library/core/src/intrinsics/mod.rs
+++ b/library/core/src/intrinsics/mod.rs
@@ -2667,7 +2667,7 @@ pub unsafe fn vtable_align(ptr: *const ()) -> usize;
 /// More specifically, this is the offset in bytes between successive
 /// items of the same type, including alignment padding.
 ///
-/// The stabilized version of this intrinsic is [`size_of`].
+/// The stabilized version of this intrinsic is [`core::mem::size_of`].
 #[rustc_nounwind]
 #[unstable(feature = "core_intrinsics", issue = "none")]
 #[rustc_intrinsic_const_stable_indirect]
@@ -2681,7 +2681,7 @@ pub const fn size_of<T>() -> usize;
 /// Therefore, implementations must not require the user to uphold
 /// any safety invariants.
 ///
-/// The stabilized version of this intrinsic is [`align_of`].
+/// The stabilized version of this intrinsic is [`core::mem::align_of`].
 #[rustc_nounwind]
 #[unstable(feature = "core_intrinsics", issue = "none")]
 #[rustc_intrinsic_const_stable_indirect]
@@ -2704,7 +2704,7 @@ pub const fn variant_count<T>() -> usize;
 
 /// The size of the referenced value in bytes.
 ///
-/// The stabilized version of this intrinsic is [`size_of_val`].
+/// The stabilized version of this intrinsic is [`core::mem::size_of_val`].
 ///
 /// # Safety
 ///
@@ -2717,7 +2717,7 @@ pub const unsafe fn size_of_val<T: ?Sized>(ptr: *const T) -> usize;
 
 /// The required alignment of the referenced value.
 ///
-/// The stabilized version of this intrinsic is [`align_of_val`].
+/// The stabilized version of this intrinsic is [`core::mem::align_of_val`].
 ///
 /// # Safety
 ///
diff --git a/library/core/src/num/int_macros.rs b/library/core/src/num/int_macros.rs
index 5683d5ec92d..10efb8aff4a 100644
--- a/library/core/src/num/int_macros.rs
+++ b/library/core/src/num/int_macros.rs
@@ -177,14 +177,14 @@ macro_rules! int_impl {
         ///
         #[doc = concat!("let n: ", stringify!($SelfT), " = 0b_01100100;")]
         ///
-        /// assert_eq!(n.isolate_most_significant_one(), 0b_01000000);
-        #[doc = concat!("assert_eq!(0_", stringify!($SelfT), ".isolate_most_significant_one(), 0);")]
+        /// assert_eq!(n.isolate_highest_one(), 0b_01000000);
+        #[doc = concat!("assert_eq!(0_", stringify!($SelfT), ".isolate_highest_one(), 0);")]
         /// ```
         #[unstable(feature = "isolate_most_least_significant_one", issue = "136909")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline(always)]
-        pub const fn isolate_most_significant_one(self) -> Self {
+        pub const fn isolate_highest_one(self) -> Self {
             self & (((1 as $SelfT) << (<$SelfT>::BITS - 1)).wrapping_shr(self.leading_zeros()))
         }
 
@@ -198,14 +198,14 @@ macro_rules! int_impl {
         ///
         #[doc = concat!("let n: ", stringify!($SelfT), " = 0b_01100100;")]
         ///
-        /// assert_eq!(n.isolate_least_significant_one(), 0b_00000100);
-        #[doc = concat!("assert_eq!(0_", stringify!($SelfT), ".isolate_least_significant_one(), 0);")]
+        /// assert_eq!(n.isolate_lowest_one(), 0b_00000100);
+        #[doc = concat!("assert_eq!(0_", stringify!($SelfT), ".isolate_lowest_one(), 0);")]
         /// ```
         #[unstable(feature = "isolate_most_least_significant_one", issue = "136909")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline(always)]
-        pub const fn isolate_least_significant_one(self) -> Self {
+        pub const fn isolate_lowest_one(self) -> Self {
             self & self.wrapping_neg()
         }
 
diff --git a/library/core/src/num/nonzero.rs b/library/core/src/num/nonzero.rs
index f793602de50..2d3a680b348 100644
--- a/library/core/src/num/nonzero.rs
+++ b/library/core/src/num/nonzero.rs
@@ -629,7 +629,7 @@ macro_rules! nonzero_integer {
             #[doc = concat!("let a = NonZero::<", stringify!($Int), ">::new(0b_01100100)?;")]
             #[doc = concat!("let b = NonZero::<", stringify!($Int), ">::new(0b_01000000)?;")]
             ///
-            /// assert_eq!(a.isolate_most_significant_one(), b);
+            /// assert_eq!(a.isolate_highest_one(), b);
             /// # Some(())
             /// # }
             /// ```
@@ -637,7 +637,7 @@ macro_rules! nonzero_integer {
             #[must_use = "this returns the result of the operation, \
                         without modifying the original"]
             #[inline(always)]
-            pub const fn isolate_most_significant_one(self) -> Self {
+            pub const fn isolate_highest_one(self) -> Self {
                 let n = self.get() & (((1 as $Int) << (<$Int>::BITS - 1)).wrapping_shr(self.leading_zeros()));
 
                 // SAFETY:
@@ -659,7 +659,7 @@ macro_rules! nonzero_integer {
             #[doc = concat!("let a = NonZero::<", stringify!($Int), ">::new(0b_01100100)?;")]
             #[doc = concat!("let b = NonZero::<", stringify!($Int), ">::new(0b_00000100)?;")]
             ///
-            /// assert_eq!(a.isolate_least_significant_one(), b);
+            /// assert_eq!(a.isolate_lowest_one(), b);
             /// # Some(())
             /// # }
             /// ```
@@ -667,7 +667,7 @@ macro_rules! nonzero_integer {
             #[must_use = "this returns the result of the operation, \
                         without modifying the original"]
             #[inline(always)]
-            pub const fn isolate_least_significant_one(self) -> Self {
+            pub const fn isolate_lowest_one(self) -> Self {
                 let n = self.get();
                 let n = n & n.wrapping_neg();
 
diff --git a/library/core/src/num/uint_macros.rs b/library/core/src/num/uint_macros.rs
index 584cd60fbe5..5a41a302916 100644
--- a/library/core/src/num/uint_macros.rs
+++ b/library/core/src/num/uint_macros.rs
@@ -229,14 +229,14 @@ macro_rules! uint_impl {
         ///
         #[doc = concat!("let n: ", stringify!($SelfT), " = 0b_01100100;")]
         ///
-        /// assert_eq!(n.isolate_most_significant_one(), 0b_01000000);
-        #[doc = concat!("assert_eq!(0_", stringify!($SelfT), ".isolate_most_significant_one(), 0);")]
+        /// assert_eq!(n.isolate_highest_one(), 0b_01000000);
+        #[doc = concat!("assert_eq!(0_", stringify!($SelfT), ".isolate_highest_one(), 0);")]
         /// ```
         #[unstable(feature = "isolate_most_least_significant_one", issue = "136909")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline(always)]
-        pub const fn isolate_most_significant_one(self) -> Self {
+        pub const fn isolate_highest_one(self) -> Self {
             self & (((1 as $SelfT) << (<$SelfT>::BITS - 1)).wrapping_shr(self.leading_zeros()))
         }
 
@@ -250,14 +250,14 @@ macro_rules! uint_impl {
         ///
         #[doc = concat!("let n: ", stringify!($SelfT), " = 0b_01100100;")]
         ///
-        /// assert_eq!(n.isolate_least_significant_one(), 0b_00000100);
-        #[doc = concat!("assert_eq!(0_", stringify!($SelfT), ".isolate_least_significant_one(), 0);")]
+        /// assert_eq!(n.isolate_lowest_one(), 0b_00000100);
+        #[doc = concat!("assert_eq!(0_", stringify!($SelfT), ".isolate_lowest_one(), 0);")]
         /// ```
         #[unstable(feature = "isolate_most_least_significant_one", issue = "136909")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline(always)]
-        pub const fn isolate_least_significant_one(self) -> Self {
+        pub const fn isolate_lowest_one(self) -> Self {
             self & self.wrapping_neg()
         }
 
diff --git a/library/coretests/tests/nonzero.rs b/library/coretests/tests/nonzero.rs
index 00232c9b706..60e1149f6e6 100644
--- a/library/coretests/tests/nonzero.rs
+++ b/library/coretests/tests/nonzero.rs
@@ -321,7 +321,7 @@ fn nonzero_trailing_zeros() {
 }
 
 #[test]
-fn test_nonzero_isolate_most_significant_one() {
+fn test_nonzero_isolate_highest_one() {
     // Signed most significant one
     macro_rules! nonzero_int_impl {
         ($($T:ty),+) => {
@@ -335,8 +335,8 @@ fn test_nonzero_isolate_most_significant_one() {
                     let mut i = 0;
                     while i < <$T>::BITS {
                         assert_eq!(
-                            NonZero::<$T>::new(BITS >> i).unwrap().isolate_most_significant_one(),
-                            NonZero::<$T>::new(MOST_SIG_ONE >> i).unwrap().isolate_most_significant_one()
+                            NonZero::<$T>::new(BITS >> i).unwrap().isolate_highest_one(),
+                            NonZero::<$T>::new(MOST_SIG_ONE >> i).unwrap().isolate_highest_one()
                         );
                         i += 1;
                     }
@@ -356,8 +356,8 @@ fn test_nonzero_isolate_most_significant_one() {
                     let mut i = 0;
                     while i < <$T>::BITS {
                         assert_eq!(
-                            NonZero::<$T>::new(BITS >> i).unwrap().isolate_most_significant_one(),
-                            NonZero::<$T>::new(MOST_SIG_ONE >> i).unwrap().isolate_most_significant_one(),
+                            NonZero::<$T>::new(BITS >> i).unwrap().isolate_highest_one(),
+                            NonZero::<$T>::new(MOST_SIG_ONE >> i).unwrap().isolate_highest_one(),
                         );
                         i += 1;
                     }
@@ -371,7 +371,7 @@ fn test_nonzero_isolate_most_significant_one() {
 }
 
 #[test]
-fn test_nonzero_isolate_least_significant_one() {
+fn test_nonzero_isolate_lowest_one() {
     // Signed least significant one
     macro_rules! nonzero_int_impl {
         ($($T:ty),+) => {
@@ -385,8 +385,8 @@ fn test_nonzero_isolate_least_significant_one() {
                     let mut i = 0;
                     while i < <$T>::BITS {
                         assert_eq!(
-                            NonZero::<$T>::new(BITS << i).unwrap().isolate_least_significant_one(),
-                            NonZero::<$T>::new(LEAST_SIG_ONE << i).unwrap().isolate_least_significant_one()
+                            NonZero::<$T>::new(BITS << i).unwrap().isolate_lowest_one(),
+                            NonZero::<$T>::new(LEAST_SIG_ONE << i).unwrap().isolate_lowest_one()
                         );
                         i += 1;
                     }
@@ -406,8 +406,8 @@ fn test_nonzero_isolate_least_significant_one() {
                     let mut i = 0;
                     while i < <$T>::BITS {
                         assert_eq!(
-                            NonZero::<$T>::new(BITS << i).unwrap().isolate_least_significant_one(),
-                            NonZero::<$T>::new(LEAST_SIG_ONE << i).unwrap().isolate_least_significant_one(),
+                            NonZero::<$T>::new(BITS << i).unwrap().isolate_lowest_one(),
+                            NonZero::<$T>::new(LEAST_SIG_ONE << i).unwrap().isolate_lowest_one(),
                         );
                         i += 1;
                     }
diff --git a/library/coretests/tests/num/int_macros.rs b/library/coretests/tests/num/int_macros.rs
index 41d399c1ad9..ca32fce861f 100644
--- a/library/coretests/tests/num/int_macros.rs
+++ b/library/coretests/tests/num/int_macros.rs
@@ -194,7 +194,7 @@ macro_rules! int_module {
         }
 
         #[test]
-        fn test_isolate_most_significant_one() {
+        fn test_isolate_highest_one() {
             const BITS: $T = -1;
             const MOST_SIG_ONE: $T = 1 << (<$T>::BITS - 1);
 
@@ -203,15 +203,15 @@ macro_rules! int_module {
             let mut i = 0;
             while i < <$T>::BITS {
                 assert_eq!(
-                    (BITS >> i).isolate_most_significant_one(),
-                    (MOST_SIG_ONE >> i).isolate_most_significant_one()
+                    (BITS >> i).isolate_highest_one(),
+                    (MOST_SIG_ONE >> i).isolate_highest_one()
                 );
                 i += 1;
             }
         }
 
         #[test]
-        fn test_isolate_least_significant_one() {
+        fn test_isolate_lowest_one() {
             const BITS: $T = -1;
             const LEAST_SIG_ONE: $T = 1;
 
@@ -220,8 +220,8 @@ macro_rules! int_module {
             let mut i = 0;
             while i < <$T>::BITS {
                 assert_eq!(
-                    (BITS << i).isolate_least_significant_one(),
-                    (LEAST_SIG_ONE << i).isolate_least_significant_one()
+                    (BITS << i).isolate_lowest_one(),
+                    (LEAST_SIG_ONE << i).isolate_lowest_one()
                 );
                 i += 1;
             }
diff --git a/library/coretests/tests/num/uint_macros.rs b/library/coretests/tests/num/uint_macros.rs
index 7e02027bdd6..8f389de70aa 100644
--- a/library/coretests/tests/num/uint_macros.rs
+++ b/library/coretests/tests/num/uint_macros.rs
@@ -151,7 +151,7 @@ macro_rules! uint_module {
         }
 
         #[test]
-        fn test_isolate_most_significant_one() {
+        fn test_isolate_highest_one() {
             const BITS: $T = <$T>::MAX;
             const MOST_SIG_ONE: $T = 1 << (<$T>::BITS - 1);
 
@@ -160,15 +160,15 @@ macro_rules! uint_module {
             let mut i = 0;
             while i < <$T>::BITS {
                 assert_eq!(
-                    (BITS >> i).isolate_most_significant_one(),
-                    (MOST_SIG_ONE >> i).isolate_most_significant_one(),
+                    (BITS >> i).isolate_highest_one(),
+                    (MOST_SIG_ONE >> i).isolate_highest_one(),
                 );
                 i += 1;
             }
         }
 
         #[test]
-        fn test_isolate_least_significant_one() {
+        fn test_isolate_lowest_one() {
             const BITS: $T = <$T>::MAX;
             const LEAST_SIG_ONE: $T = 1;
 
@@ -177,8 +177,8 @@ macro_rules! uint_module {
             let mut i = 0;
             while i < <$T>::BITS {
                 assert_eq!(
-                    (BITS << i).isolate_least_significant_one(),
-                    (LEAST_SIG_ONE << i).isolate_least_significant_one(),
+                    (BITS << i).isolate_lowest_one(),
+                    (LEAST_SIG_ONE << i).isolate_lowest_one(),
                 );
                 i += 1;
             }
diff --git a/library/std/src/sys/args/common.rs b/library/std/src/sys/args/common.rs
index e787105a05a..33f3794ee63 100644
--- a/library/std/src/sys/args/common.rs
+++ b/library/std/src/sys/args/common.rs
@@ -12,7 +12,7 @@ impl !Sync for Args {}
 
 impl Args {
     #[inline]
-    pub(super) fn new(args: Vec<OsString>) -> Self {
+    pub fn new(args: Vec<OsString>) -> Self {
         Args { iter: args.into_iter() }
     }
 }
diff --git a/src/doc/rustc-dev-guide/src/stability.md b/src/doc/rustc-dev-guide/src/stability.md
index d0cee54adb6..c26d34273d7 100644
--- a/src/doc/rustc-dev-guide/src/stability.md
+++ b/src/doc/rustc-dev-guide/src/stability.md
@@ -181,4 +181,7 @@ the `deprecated_in_future` lint is triggered which is default `allow`, but most
 of the standard library raises it to a warning with
 `#![warn(deprecated_in_future)]`.
 
+## unstable_feature_bound
+The `#[unstable_feature_bound(foo)]` attribute can be used together with `#[unstable]` attribute to mark an `impl` of stable type and stable trait as unstable. In std/core, an item annotated with `#[unstable_feature_bound(foo)]` can only be used by another item that is also annotated with `#[unstable_feature_bound(foo)]`. Outside of std/core, using an item with `#[unstable_feature_bound(foo)]` requires the feature to be enabled with `#![feature(foo)]` attribute on the crate. Currently, only `impl`s and free functions can be annotated with `#[unstable_feature_bound]`.
+
 [blog]: https://www.ralfj.de/blog/2018/07/19/const.html
diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index 99b3da8b2cd..c48863b4681 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -1838,6 +1838,10 @@ instead, we check that it's not a "finger" cursor.
 	border-right: 3px solid var(--target-border-color);
 }
 
+a.tooltip {
+	font-family: var(--font-family);
+}
+
 .code-header a.tooltip {
 	color: inherit;
 	margin-right: 15px;
diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 35670ba89e9..84c6df5c744 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -356,7 +356,7 @@ impl<'test> TestCx<'test> {
             if proc_res.status.success() {
                 let err = &format!("{} test did not emit an error", self.config.mode);
                 let extra_note = (self.config.mode == crate::common::TestMode::Ui)
-                    .then_some("note: by default, ui tests are expected not to compile");
+                    .then_some("note: by default, ui tests are expected not to compile.\nhint: use check-pass, build-pass, or run-pass directive to change this behavior.");
                 self.fatal_proc_rec_general(err, extra_note, proc_res, || ());
             }
 
diff --git a/src/tools/run-make-support/src/diff/mod.rs b/src/tools/run-make-support/src/diff/mod.rs
index ee48e373366..739eff72f05 100644
--- a/src/tools/run-make-support/src/diff/mod.rs
+++ b/src/tools/run-make-support/src/diff/mod.rs
@@ -23,6 +23,7 @@ pub struct Diff {
     actual: Option<String>,
     actual_name: Option<String>,
     normalizers: Vec<(String, String)>,
+    bless_dir: Option<String>,
     drop_bomb: DropBomb,
 }
 
@@ -37,6 +38,7 @@ impl Diff {
             actual: None,
             actual_name: None,
             normalizers: Vec::new(),
+            bless_dir: std::env::var("RUSTC_BLESS_TEST").ok(),
             drop_bomb: DropBomb::arm("diff"),
         }
     }
@@ -44,6 +46,13 @@ impl Diff {
     /// Specify the expected output for the diff from a file.
     pub fn expected_file<P: AsRef<Path>>(&mut self, path: P) -> &mut Self {
         let path = path.as_ref();
+        // In `--bless` mode, create the snapshot file if it doesn't already exist.
+        // The empty file will be overwritten with the actual text.
+        if self.bless_dir.is_some()
+            && let Ok(false) = std::fs::exists(path)
+        {
+            fs::write(path, "");
+        }
         let content = fs::read_to_string(path);
         let name = path.to_string_lossy().to_string();
 
@@ -148,7 +157,7 @@ impl Diff {
         let Some(ref expected_file) = self.expected_file else {
             return false;
         };
-        let Ok(bless_dir) = std::env::var("RUSTC_BLESS_TEST") else {
+        let Some(ref bless_dir) = self.bless_dir else {
             return false;
         };
 
diff --git a/tests/rustdoc-gui/notable-trait.goml b/tests/rustdoc-gui/notable-trait.goml
index 7fc70e0675d..423a273fde7 100644
--- a/tests/rustdoc-gui/notable-trait.goml
+++ b/tests/rustdoc-gui/notable-trait.goml
@@ -8,10 +8,10 @@ define-function: (
     [x, i_x],
     block {
         // Checking they have the same y position.
-        compare-elements-position: (
+        compare-elements-position-near: (
             "//*[@id='method.create_an_iterator_from_read']//a[normalize-space()='NotableStructWithLongName']",
             "//*[@id='method.create_an_iterator_from_read']//*[@class='tooltip']",
-            ["y"],
+            {"y": 1},
         )
         // Checking they don't have the same x position.
         compare-elements-position-false: (
diff --git a/tests/rustdoc-gui/src/test_docs/lib.rs b/tests/rustdoc-gui/src/test_docs/lib.rs
index e8afe8b5687..623f5b33e9b 100644
--- a/tests/rustdoc-gui/src/test_docs/lib.rs
+++ b/tests/rustdoc-gui/src/test_docs/lib.rs
@@ -767,3 +767,17 @@ pub mod impls_indent {
         pub fn bar() {}
     }
 }
+
+pub mod tooltips {
+    pub struct X;
+
+    impl X {
+        pub fn bar() -> Vec<u8> {
+            Vec::new()
+        }
+    }
+
+    pub fn bar() -> Vec<u8> {
+        Vec::new()
+    }
+}
diff --git a/tests/rustdoc-gui/tooltips.goml b/tests/rustdoc-gui/tooltips.goml
new file mode 100644
index 00000000000..6e79196be27
--- /dev/null
+++ b/tests/rustdoc-gui/tooltips.goml
@@ -0,0 +1,15 @@
+// This test checks that the right font is applied to the `i` tooltip element.
+
+define-function: (
+    "check-font",
+    [path],
+    block {
+        go-to: "file://" + |DOC_PATH| + "/test_docs/" + |path|
+        assert-css: (
+            "a.tooltip", {"font-family": '"Source Serif 4", NanumBarunGothic, serif'}, ALL,
+        )
+    }
+)
+
+call-function: ("check-font", {"path": "tooltips/fn.bar.html"})
+call-function: ("check-font", {"path": "tooltips/struct.X.html"})
diff --git a/tests/ui/issues/issue-5754.rs b/tests/ui/abi/extern-c-two-doubles-x86_64-5754.rs
index 0aa09882959..7f44ef9c685 100644
--- a/tests/ui/issues/issue-5754.rs
+++ b/tests/ui/abi/extern-c-two-doubles-x86_64-5754.rs
@@ -1,8 +1,8 @@
+// https://github.com/rust-lang/rust/issues/5754
 //@ build-pass
 #![allow(dead_code)]
 #![allow(improper_ctypes)]
 
-
 struct TwoDoubles {
     r: f64,
     i: f64
diff --git a/tests/ui/issues/issue-8898.rs b/tests/ui/array-slice-vec/fixed-size-arrays-zero-size-types-8898.rs
index 4447704f059..fe627b00f53 100644
--- a/tests/ui/issues/issue-8898.rs
+++ b/tests/ui/array-slice-vec/fixed-size-arrays-zero-size-types-8898.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/8898
 //@ run-pass
 
 fn assert_repr_eq<T: std::fmt::Debug>(obj : T, expected : String) {
diff --git a/tests/ui/issues/issue-43483.rs b/tests/ui/associated-consts/trait-associated-const-usage-43483.rs
index 2c62671d0c7..c24157d45e7 100644
--- a/tests/ui/issues/issue-43483.rs
+++ b/tests/ui/associated-consts/trait-associated-const-usage-43483.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/43483
 //@ check-pass
 #![allow(dead_code)]
 #![allow(unused_variables)]
diff --git a/tests/ui/issues/issue-21946.rs b/tests/ui/associated-types/recursive-associated-type-overflow-21946.rs
index d0c052cb2fd..ba84ea11300 100644
--- a/tests/ui/issues/issue-21946.rs
+++ b/tests/ui/associated-types/recursive-associated-type-overflow-21946.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/21946
 trait Foo {
     type A;
 }
diff --git a/tests/ui/issues/issue-21946.stderr b/tests/ui/associated-types/recursive-associated-type-overflow-21946.stderr
index d1b4a808d2e..37fb0ed7eb8 100644
--- a/tests/ui/issues/issue-21946.stderr
+++ b/tests/ui/associated-types/recursive-associated-type-overflow-21946.stderr
@@ -1,5 +1,5 @@
 error[E0275]: overflow evaluating the requirement `<FooStruct as Foo>::A == _`
-  --> $DIR/issue-21946.rs:8:14
+  --> $DIR/recursive-associated-type-overflow-21946.rs:9:14
    |
 LL |     type A = <FooStruct as Foo>::A;
    |              ^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/issues/issue-7061.rs b/tests/ui/borrowck/mismatched-pointer-type-in-self-7061.rs
index c5d5a9d9498..521a5ee9c37 100644
--- a/tests/ui/issues/issue-7061.rs
+++ b/tests/ui/borrowck/mismatched-pointer-type-in-self-7061.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/7061
 //@ dont-require-annotations: NOTE
 
 struct BarStruct;
diff --git a/tests/ui/issues/issue-7061.stderr b/tests/ui/borrowck/mismatched-pointer-type-in-self-7061.stderr
index b4c0ebfbdd5..39b9072dc30 100644
--- a/tests/ui/issues/issue-7061.stderr
+++ b/tests/ui/borrowck/mismatched-pointer-type-in-self-7061.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-7061.rs:6:46
+  --> $DIR/mismatched-pointer-type-in-self-7061.rs:7:46
    |
 LL |     fn foo(&'a mut self) -> Box<BarStruct> { self }
    |                             --------------   ^^^^ expected `Box<BarStruct>`, found `&mut BarStruct`
diff --git a/tests/ui/issues/issue-13665.rs b/tests/ui/borrowck/region-checker-map-closure-13665.rs
index e1d8be16f45..72efa42fe38 100644
--- a/tests/ui/issues/issue-13665.rs
+++ b/tests/ui/borrowck/region-checker-map-closure-13665.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/13665
 //@ run-pass
 
 fn foo<'r>() {
diff --git a/tests/ui/issues/issue-21600.rs b/tests/ui/closures/aliasability-violation-with-closure-21600.rs
index 2e22e5e6fa2..d4c658319ab 100644
--- a/tests/ui/issues/issue-21600.rs
+++ b/tests/ui/closures/aliasability-violation-with-closure-21600.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/21600
 fn call_it<F>(f: F) where F: Fn() { f(); }
 
 struct A;
diff --git a/tests/ui/issues/issue-21600.stderr b/tests/ui/closures/aliasability-violation-with-closure-21600.stderr
index f7905934424..2d2397a2141 100644
--- a/tests/ui/issues/issue-21600.stderr
+++ b/tests/ui/closures/aliasability-violation-with-closure-21600.stderr
@@ -1,5 +1,5 @@
 error[E0596]: cannot borrow `x` as mutable, as it is a captured variable in a `Fn` closure
-  --> $DIR/issue-21600.rs:14:20
+  --> $DIR/aliasability-violation-with-closure-21600.rs:15:20
    |
 LL | fn call_it<F>(f: F) where F: Fn() { f(); }
    |                  - change this to accept `FnMut` instead of `Fn`
@@ -11,7 +11,7 @@ LL |         call_it(|| x.gen_mut());
    |         expects `Fn` instead of `FnMut`
 
 error[E0596]: cannot borrow `x` as mutable, as it is a captured variable in a `Fn` closure
-  --> $DIR/issue-21600.rs:14:17
+  --> $DIR/aliasability-violation-with-closure-21600.rs:15:17
    |
 LL | fn call_it<F>(f: F) where F: Fn() { f(); }
    |                  - change this to accept `FnMut` instead of `Fn`
diff --git a/tests/ui/issues/issue-32086.rs b/tests/ui/consts/const-pattern-rewrite-error-32086.rs
index d595d1dd7e6..d35dfe57687 100644
--- a/tests/ui/issues/issue-32086.rs
+++ b/tests/ui/consts/const-pattern-rewrite-error-32086.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/32086
 struct S(u8);
 const C: S = S(10);
 
diff --git a/tests/ui/issues/issue-32086.stderr b/tests/ui/consts/const-pattern-rewrite-error-32086.stderr
index e566dea8908..47616b06632 100644
--- a/tests/ui/issues/issue-32086.stderr
+++ b/tests/ui/consts/const-pattern-rewrite-error-32086.stderr
@@ -1,5 +1,5 @@
 error[E0532]: expected tuple struct or tuple variant, found constant `C`
-  --> $DIR/issue-32086.rs:5:9
+  --> $DIR/const-pattern-rewrite-error-32086.rs:6:9
    |
 LL | struct S(u8);
    | ------------- similarly named tuple struct `S` defined here
@@ -8,7 +8,7 @@ LL |     let C(a) = S(11);
    |         ^ help: a tuple struct with a similar name exists: `S`
 
 error[E0532]: expected tuple struct or tuple variant, found constant `C`
-  --> $DIR/issue-32086.rs:6:9
+  --> $DIR/const-pattern-rewrite-error-32086.rs:7:9
    |
 LL | struct S(u8);
    | ------------- similarly named tuple struct `S` defined here
diff --git a/tests/ui/issues/auxiliary/issue-5521.rs b/tests/ui/cross-crate/auxiliary/aux-5521.rs
index c2f81779b35..c2f81779b35 100644
--- a/tests/ui/issues/auxiliary/issue-5521.rs
+++ b/tests/ui/cross-crate/auxiliary/aux-5521.rs
diff --git a/tests/ui/issues/issue-5521.rs b/tests/ui/cross-crate/cross-crate-map-usage-5521.rs
index 45896ae8128..ffce846be2c 100644
--- a/tests/ui/issues/issue-5521.rs
+++ b/tests/ui/cross-crate/cross-crate-map-usage-5521.rs
@@ -1,10 +1,9 @@
+// https://github.com/rust-lang/rust/issues/5521
 //@ run-pass
 #![allow(dead_code)]
-//@ aux-build:issue-5521.rs
+//@ aux-build:aux-5521.rs
 
-
-
-extern crate issue_5521 as foo;
+extern crate aux_5521 as foo;
 
 fn bar(a: foo::map) {
     if false {
diff --git a/tests/ui/issues/issue-46332.rs b/tests/ui/did_you_mean/typo-suggestion-improvement-46332.rs
index bed74e3138a..3dd686a66b0 100644
--- a/tests/ui/issues/issue-46332.rs
+++ b/tests/ui/did_you_mean/typo-suggestion-improvement-46332.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/46332
 // Original Levenshtein distance for both of this is 1. We improved accuracy with
 // additional case insensitive comparison.
 
diff --git a/tests/ui/issues/issue-46332.stderr b/tests/ui/did_you_mean/typo-suggestion-improvement-46332.stderr
index 8c0c1dfa6ee..502f8151878 100644
--- a/tests/ui/issues/issue-46332.stderr
+++ b/tests/ui/did_you_mean/typo-suggestion-improvement-46332.stderr
@@ -1,5 +1,5 @@
 error[E0422]: cannot find struct, variant or union type `TyUInt` in this scope
-  --> $DIR/issue-46332.rs:9:5
+  --> $DIR/typo-suggestion-improvement-46332.rs:10:5
    |
 LL | struct TyUint {}
    | ------------- similarly named struct `TyUint` defined here
diff --git a/tests/ui/issues/issue-6892.rs b/tests/ui/drop/destructor-run-for-let-ignore-6892.rs
index 7d99aef4ac5..0fcf133c2b1 100644
--- a/tests/ui/issues/issue-6892.rs
+++ b/tests/ui/drop/destructor-run-for-let-ignore-6892.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/6892
 //@ run-pass
 #![allow(dead_code)]
 // Ensures that destructors are run for expressions of the form "let _ = e;"
diff --git a/tests/ui/issues/issue-16151.rs b/tests/ui/drop/drop-count-assertion-16151.rs
index b18108e0a8a..ede6bc23e73 100644
--- a/tests/ui/issues/issue-16151.rs
+++ b/tests/ui/drop/drop-count-assertion-16151.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/16151
 //@ run-pass
 
 // FIXME(static_mut_refs): Do not allow `static_mut_refs` lint
diff --git a/tests/ui/issues/issue-20939.rs b/tests/ui/dyn-compatibility/dyn-compatible-trait-implementation-20939.rs
index c0c22297897..c7938b275e9 100644
--- a/tests/ui/issues/issue-20939.rs
+++ b/tests/ui/dyn-compatibility/dyn-compatible-trait-implementation-20939.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/20939
 trait Foo {}
 
 impl<'a> Foo for dyn Foo + 'a {}
diff --git a/tests/ui/issues/issue-20939.stderr b/tests/ui/dyn-compatibility/dyn-compatible-trait-implementation-20939.stderr
index 00357155c8a..196d8b6a880 100644
--- a/tests/ui/issues/issue-20939.stderr
+++ b/tests/ui/dyn-compatibility/dyn-compatible-trait-implementation-20939.stderr
@@ -1,5 +1,5 @@
 error[E0371]: the object type `(dyn Foo + 'a)` automatically implements the trait `Foo`
-  --> $DIR/issue-20939.rs:3:1
+  --> $DIR/dyn-compatible-trait-implementation-20939.rs:4:1
    |
 LL | impl<'a> Foo for dyn Foo + 'a {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Foo + 'a)` automatically implements trait `Foo`
diff --git a/tests/ui/issues/issue-36075.rs b/tests/ui/generics/unused-type-parameter-regression-36075.rs
index a563332ad78..4d6eb617b59 100644
--- a/tests/ui/issues/issue-36075.rs
+++ b/tests/ui/generics/unused-type-parameter-regression-36075.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/36075
 //@ check-pass
 #![allow(dead_code)]
 trait DeclarationParser {
diff --git a/tests/ui/issues/issue-9188.rs b/tests/ui/issues/issue-9188.rs
deleted file mode 100644
index df2f90a0f16..00000000000
--- a/tests/ui/issues/issue-9188.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-//@ run-pass
-//@ aux-build:issue-9188.rs
-
-
-extern crate issue_9188;
-
-pub fn main() {
-    let a = issue_9188::bar();
-    let b = issue_9188::foo::<isize>();
-    assert_eq!(*a, *b);
-}
diff --git a/tests/ui/issues/issue-23966.rs b/tests/ui/iterators/fold-iterator-error-23966.rs
index 5fdec28ac2c..970c943da0b 100644
--- a/tests/ui/issues/issue-23966.rs
+++ b/tests/ui/iterators/fold-iterator-error-23966.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/23966
 fn main() {
     "".chars().fold(|_, _| (), ());
     //~^ ERROR E0277
diff --git a/tests/ui/issues/issue-23966.stderr b/tests/ui/iterators/fold-iterator-error-23966.stderr
index 3f7a4fa312f..15249a93597 100644
--- a/tests/ui/issues/issue-23966.stderr
+++ b/tests/ui/iterators/fold-iterator-error-23966.stderr
@@ -1,5 +1,5 @@
 error[E0277]: expected a `FnMut(_, char)` closure, found `()`
-  --> $DIR/issue-23966.rs:2:32
+  --> $DIR/fold-iterator-error-23966.rs:3:32
    |
 LL |     "".chars().fold(|_, _| (), ());
    |                ----            ^^ expected an `FnMut(_, char)` closure, found `()`
diff --git a/tests/ui/issues/issue-15735.rs b/tests/ui/lifetimes/lifetime-inference-miss-15735.rs
index f5b3803f155..c75d59a2f4b 100644
--- a/tests/ui/issues/issue-15735.rs
+++ b/tests/ui/lifetimes/lifetime-inference-miss-15735.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/15735
 //@ check-pass
 #![allow(dead_code)]
 struct A<'a> {
diff --git a/tests/ui/issues/issue-75704.rs b/tests/ui/loops/infinite-loop-simplify-cfg-75704.rs
index 1672bf0b4c3..8bc5fba7a68 100644
--- a/tests/ui/issues/issue-75704.rs
+++ b/tests/ui/loops/infinite-loop-simplify-cfg-75704.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/75704
 // Caused an infinite loop during SimlifyCfg MIR transform previously.
 //
 //@ build-pass
diff --git a/tests/ui/issues/issue-19100.fixed b/tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.fixed
index 1162490048c..40c92322519 100644
--- a/tests/ui/issues/issue-19100.fixed
+++ b/tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.fixed
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/19100
 //@ run-rustfix
 
 #![allow(non_snake_case)]
diff --git a/tests/ui/issues/issue-19100.rs b/tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.rs
index fefed0daa72..9ef6fd77b50 100644
--- a/tests/ui/issues/issue-19100.rs
+++ b/tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/19100
 //@ run-rustfix
 
 #![allow(non_snake_case)]
diff --git a/tests/ui/issues/issue-19100.stderr b/tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.stderr
index ebbf083b7de..7356a4a003b 100644
--- a/tests/ui/issues/issue-19100.stderr
+++ b/tests/ui/match/unreachable-pattern-if-variant-not-imported-19100.stderr
@@ -1,5 +1,5 @@
 error[E0170]: pattern binding `Bar` is named the same as one of the variants of the type `Foo`
-  --> $DIR/issue-19100.rs:17:1
+  --> $DIR/unreachable-pattern-if-variant-not-imported-19100.rs:18:1
    |
 LL | Bar if true
    | ^^^ help: to match on the variant, qualify the path: `Foo::Bar`
@@ -7,7 +7,7 @@ LL | Bar if true
    = note: `#[deny(bindings_with_variant_name)]` on by default
 
 error[E0170]: pattern binding `Baz` is named the same as one of the variants of the type `Foo`
-  --> $DIR/issue-19100.rs:21:1
+  --> $DIR/unreachable-pattern-if-variant-not-imported-19100.rs:22:1
    |
 LL | Baz if false
    | ^^^ help: to match on the variant, qualify the path: `Foo::Baz`
diff --git a/tests/ui/issues/issue-22684.rs b/tests/ui/methods/trait-method-resolution-over-inherent-22684.rs
index a5b042706ed..9f317b576e6 100644
--- a/tests/ui/issues/issue-22684.rs
+++ b/tests/ui/methods/trait-method-resolution-over-inherent-22684.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/22684
 mod foo {
     pub struct Foo;
     impl Foo {
diff --git a/tests/ui/issues/issue-22684.stderr b/tests/ui/methods/trait-method-resolution-over-inherent-22684.stderr
index e2ca54caeac..0ab7701fa9e 100644
--- a/tests/ui/issues/issue-22684.stderr
+++ b/tests/ui/methods/trait-method-resolution-over-inherent-22684.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-22684.rs:17:17
+  --> $DIR/trait-method-resolution-over-inherent-22684.rs:18:17
    |
 LL |     let _: () = foo::Foo.bar();
    |            --   ^^^^^^^^^^^^^^ expected `()`, found `bool`
diff --git a/tests/ui/issues/issue-24352.rs b/tests/ui/mismatched_types/float-integer-subtraction-error-24352.rs
index 5c8246d179f..eb632398c62 100644
--- a/tests/ui/issues/issue-24352.rs
+++ b/tests/ui/mismatched_types/float-integer-subtraction-error-24352.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/24352
 fn main() {
     1.0f64 - 1.0;
     1.0f64 - 1 //~ ERROR E0277
diff --git a/tests/ui/issues/issue-24352.stderr b/tests/ui/mismatched_types/float-integer-subtraction-error-24352.stderr
index 3e0f812b5c7..7dc1fa777fc 100644
--- a/tests/ui/issues/issue-24352.stderr
+++ b/tests/ui/mismatched_types/float-integer-subtraction-error-24352.stderr
@@ -1,5 +1,5 @@
 error[E0277]: cannot subtract `{integer}` from `f64`
-  --> $DIR/issue-24352.rs:3:12
+  --> $DIR/float-integer-subtraction-error-24352.rs:4:12
    |
 LL |     1.0f64 - 1
    |            ^ no implementation for `f64 - {integer}`
diff --git a/tests/ui/issues/issue-50585.rs b/tests/ui/mismatched_types/for-loop-in-vec-type-mismatchrs-50585.rs
index ca2ece8d53b..4abef0bee81 100644
--- a/tests/ui/issues/issue-50585.rs
+++ b/tests/ui/mismatched_types/for-loop-in-vec-type-mismatchrs-50585.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/50585
 fn main() {
     |y: Vec<[(); for x in 0..2 {}]>| {};
     //~^ ERROR mismatched types
diff --git a/tests/ui/issues/issue-50585.stderr b/tests/ui/mismatched_types/for-loop-in-vec-type-mismatchrs-50585.stderr
index 7e83ea35fbb..d60d97a02ab 100644
--- a/tests/ui/issues/issue-50585.stderr
+++ b/tests/ui/mismatched_types/for-loop-in-vec-type-mismatchrs-50585.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-50585.rs:2:18
+  --> $DIR/for-loop-in-vec-type-mismatchrs-50585.rs:3:18
    |
 LL |     |y: Vec<[(); for x in 0..2 {}]>| {};
    |                  ^^^^^^^^^^^^^^^^ expected `usize`, found `()`
diff --git a/tests/ui/issues/issue-48364.rs b/tests/ui/mismatched_types/starts-with-stringify-type-mismatch-48364.rs
index 14ee75e7c9c..13ba8b1e59c 100644
--- a/tests/ui/issues/issue-48364.rs
+++ b/tests/ui/mismatched_types/starts-with-stringify-type-mismatch-48364.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/48364
 fn foo() -> bool {
     b"".starts_with(stringify!(foo))
     //~^ ERROR mismatched types
diff --git a/tests/ui/issues/issue-48364.stderr b/tests/ui/mismatched_types/starts-with-stringify-type-mismatch-48364.stderr
index 74bfa1e0693..bb767d50bb0 100644
--- a/tests/ui/issues/issue-48364.stderr
+++ b/tests/ui/mismatched_types/starts-with-stringify-type-mismatch-48364.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-48364.rs:2:21
+  --> $DIR/starts-with-stringify-type-mismatch-48364.rs:3:21
    |
 LL |     b"".starts_with(stringify!(foo))
    |         ----------- ^^^^^^^^^^^^^^^ expected `&[u8]`, found `&str`
diff --git a/tests/ui/issues/issue-32797.rs b/tests/ui/modules/circular-module-imports-32797.rs
index 470d661cb28..5a2f2990795 100644
--- a/tests/ui/issues/issue-32797.rs
+++ b/tests/ui/modules/circular-module-imports-32797.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/32797
 //@ check-pass
 
 pub use bar::*;
diff --git a/tests/ui/issues/issue-17385.rs b/tests/ui/moves/matching-partially-moved-value-17385.rs
index 7400aadb059..c50fe048bfb 100644
--- a/tests/ui/issues/issue-17385.rs
+++ b/tests/ui/moves/matching-partially-moved-value-17385.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/17385
 struct X(isize);
 
 enum Enum {
diff --git a/tests/ui/issues/issue-17385.stderr b/tests/ui/moves/matching-partially-moved-value-17385.stderr
index 3c451a859e9..906f7868bcc 100644
--- a/tests/ui/issues/issue-17385.stderr
+++ b/tests/ui/moves/matching-partially-moved-value-17385.stderr
@@ -1,5 +1,5 @@
 error[E0382]: use of moved value: `foo`
-  --> $DIR/issue-17385.rs:18:5
+  --> $DIR/matching-partially-moved-value-17385.rs:19:5
    |
 LL |     let foo = X(1);
    |         --- move occurs because `foo` has type `X`, which does not implement the `Copy` trait
@@ -9,7 +9,7 @@ LL |     match foo {
    |     ^^^^^^^^^ value used here after move
    |
 note: if `X` implemented `Clone`, you could clone the value
-  --> $DIR/issue-17385.rs:1:1
+  --> $DIR/matching-partially-moved-value-17385.rs:2:1
    |
 LL | struct X(isize);
    | ^^^^^^^^ consider implementing `Clone` for this type
@@ -18,7 +18,7 @@ LL |     drop(foo);
    |          --- you could clone this value
 
 error[E0382]: use of moved value: `e`
-  --> $DIR/issue-17385.rs:25:11
+  --> $DIR/matching-partially-moved-value-17385.rs:26:11
    |
 LL |     let e = Enum::Variant2;
    |         - move occurs because `e` has type `Enum`, which does not implement the `Copy` trait
@@ -28,7 +28,7 @@ LL |     match e {
    |           ^ value used here after move
    |
 note: if `Enum` implemented `Clone`, you could clone the value
-  --> $DIR/issue-17385.rs:3:1
+  --> $DIR/matching-partially-moved-value-17385.rs:4:1
    |
 LL | enum Enum {
    | ^^^^^^^^^ consider implementing `Clone` for this type
diff --git a/tests/ui/issues/issue-32805.rs b/tests/ui/numbers-arithmetic/f32-literal-rounding-32805.rs
index 717c00a248a..59efdb9a1aa 100644
--- a/tests/ui/issues/issue-32805.rs
+++ b/tests/ui/numbers-arithmetic/f32-literal-rounding-32805.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/32805
 //@ run-pass
 fn const_mir() -> f32 { 9007199791611905.0 }
 
diff --git a/tests/ui/issues/issue-3763.rs b/tests/ui/privacy/private-field-access-violation-3763.rs
index 893009a2cd9..3fc2337086d 100644
--- a/tests/ui/issues/issue-3763.rs
+++ b/tests/ui/privacy/private-field-access-violation-3763.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/3763
 // Regression test for #3763
 
 mod my_mod {
diff --git a/tests/ui/issues/issue-3763.stderr b/tests/ui/privacy/private-field-access-violation-3763.stderr
index d101e4c33ad..6ba83dc4d78 100644
--- a/tests/ui/issues/issue-3763.stderr
+++ b/tests/ui/privacy/private-field-access-violation-3763.stderr
@@ -1,17 +1,17 @@
 error[E0616]: field `priv_field` of struct `MyStruct` is private
-  --> $DIR/issue-3763.rs:17:32
+  --> $DIR/private-field-access-violation-3763.rs:18:32
    |
 LL |     let _woohoo = (&my_struct).priv_field;
    |                                ^^^^^^^^^^ private field
 
 error[E0616]: field `priv_field` of struct `MyStruct` is private
-  --> $DIR/issue-3763.rs:20:41
+  --> $DIR/private-field-access-violation-3763.rs:21:41
    |
 LL |     let _woohoo = (Box::new(my_struct)).priv_field;
    |                                         ^^^^^^^^^^ private field
 
 error[E0624]: method `happyfun` is private
-  --> $DIR/issue-3763.rs:23:18
+  --> $DIR/private-field-access-violation-3763.rs:24:18
    |
 LL |         fn happyfun(&self) {}
    |         ------------------ private method defined here
@@ -20,7 +20,7 @@ LL |     (&my_struct).happyfun();
    |                  ^^^^^^^^ private method
 
 error[E0624]: method `happyfun` is private
-  --> $DIR/issue-3763.rs:25:27
+  --> $DIR/private-field-access-violation-3763.rs:26:27
    |
 LL |         fn happyfun(&self) {}
    |         ------------------ private method defined here
@@ -29,7 +29,7 @@ LL |     (Box::new(my_struct)).happyfun();
    |                           ^^^^^^^^ private method
 
 error[E0616]: field `priv_field` of struct `MyStruct` is private
-  --> $DIR/issue-3763.rs:26:26
+  --> $DIR/private-field-access-violation-3763.rs:27:26
    |
 LL |     let nope = my_struct.priv_field;
    |                          ^^^^^^^^^^ private field
diff --git a/tests/ui/issues/issue-2281-part1.rs b/tests/ui/resolve/cannot-find-value-in-scope-22811.rs
index 8340ade2239..fc07ae5e60e 100644
--- a/tests/ui/issues/issue-2281-part1.rs
+++ b/tests/ui/resolve/cannot-find-value-in-scope-22811.rs
@@ -1 +1,2 @@
+// https://github.com/rust-lang/rust/issues/22811
 fn main() { println!("{}", foobar); } //~ ERROR cannot find value `foobar` in this scope
diff --git a/tests/ui/issues/issue-2281-part1.stderr b/tests/ui/resolve/cannot-find-value-in-scope-22811.stderr
index 47a1ef8cc02..529fd7e8f49 100644
--- a/tests/ui/issues/issue-2281-part1.stderr
+++ b/tests/ui/resolve/cannot-find-value-in-scope-22811.stderr
@@ -1,5 +1,5 @@
 error[E0425]: cannot find value `foobar` in this scope
-  --> $DIR/issue-2281-part1.rs:1:28
+  --> $DIR/cannot-find-value-in-scope-22811.rs:2:28
    |
 LL | fn main() { println!("{}", foobar); }
    |                            ^^^^^^ not found in this scope
diff --git a/tests/ui/issues/issue-33293.rs b/tests/ui/resolve/unresolved-module-error-33293.rs
index 115ae3aad20..354f9914d44 100644
--- a/tests/ui/issues/issue-33293.rs
+++ b/tests/ui/resolve/unresolved-module-error-33293.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/33293
 fn main() {
     match 0 {
         aaa::bbb(_) => ()
diff --git a/tests/ui/issues/issue-33293.stderr b/tests/ui/resolve/unresolved-module-error-33293.stderr
index a82813194d7..28528148387 100644
--- a/tests/ui/issues/issue-33293.stderr
+++ b/tests/ui/resolve/unresolved-module-error-33293.stderr
@@ -1,5 +1,5 @@
 error[E0433]: failed to resolve: use of unresolved module or unlinked crate `aaa`
-  --> $DIR/issue-33293.rs:3:9
+  --> $DIR/unresolved-module-error-33293.rs:4:9
    |
 LL |         aaa::bbb(_) => ()
    |         ^^^ use of unresolved module or unlinked crate `aaa`
diff --git a/tests/ui/issues/issue-47073-zero-padded-tuple-struct-indices.rs b/tests/ui/structs/tuple-struct-field-naming-47073.rs
index 6cd1f144359..6cf27e55c4b 100644
--- a/tests/ui/issues/issue-47073-zero-padded-tuple-struct-indices.rs
+++ b/tests/ui/structs/tuple-struct-field-naming-47073.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/47073
 type Guilty = bool;
 type FineDollars = u32;
 
diff --git a/tests/ui/issues/issue-47073-zero-padded-tuple-struct-indices.stderr b/tests/ui/structs/tuple-struct-field-naming-47073.stderr
index 0a6fe24d5e3..efbdaeca4ea 100644
--- a/tests/ui/issues/issue-47073-zero-padded-tuple-struct-indices.stderr
+++ b/tests/ui/structs/tuple-struct-field-naming-47073.stderr
@@ -1,5 +1,5 @@
 error[E0609]: no field `00` on type `Verdict`
-  --> $DIR/issue-47073-zero-padded-tuple-struct-indices.rs:8:30
+  --> $DIR/tuple-struct-field-naming-47073.rs:9:30
    |
 LL |     let _condemned = justice.00;
    |                              ^^ unknown field
@@ -11,7 +11,7 @@ LL +     let _condemned = justice.0;
    |
 
 error[E0609]: no field `001` on type `Verdict`
-  --> $DIR/issue-47073-zero-padded-tuple-struct-indices.rs:10:31
+  --> $DIR/tuple-struct-field-naming-47073.rs:11:31
    |
 LL |     let _punishment = justice.001;
    |                               ^^^ unknown field
diff --git a/tests/ui/issues/auxiliary/issue-9188.rs b/tests/ui/symbol-names/auxiliary/aux-9188.rs
index 3bc5697a1a6..3bc5697a1a6 100644
--- a/tests/ui/issues/auxiliary/issue-9188.rs
+++ b/tests/ui/symbol-names/auxiliary/aux-9188.rs
diff --git a/tests/ui/symbol-names/same-symbol-name-for-inner-statics-9188.rs b/tests/ui/symbol-names/same-symbol-name-for-inner-statics-9188.rs
new file mode 100644
index 00000000000..a1014bb813f
--- /dev/null
+++ b/tests/ui/symbol-names/same-symbol-name-for-inner-statics-9188.rs
@@ -0,0 +1,11 @@
+// https://github.com/rust-lang/rust/issues/9188
+//@ run-pass
+//@ aux-build:aux-9188.rs
+
+extern crate aux_9188 as lib;
+
+pub fn main() {
+    let a = lib::bar();
+    let b = lib::foo::<isize>();
+    assert_eq!(*a, *b);
+}
diff --git a/tests/ui/issues/issue-72839-error-overflow.rs b/tests/ui/trait-bounds/trait-selection-overflow-prevention-72839.rs
index 6562d228409..436657e3de5 100644
--- a/tests/ui/issues/issue-72839-error-overflow.rs
+++ b/tests/ui/trait-bounds/trait-selection-overflow-prevention-72839.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/72839
 // Regression test for issue #72839
 // Tests that we do not overflow during trait selection after
 // a type error occurs
diff --git a/tests/ui/issues/issue-72839-error-overflow.stderr b/tests/ui/trait-bounds/trait-selection-overflow-prevention-72839.stderr
index 35be632f579..da7500f77e1 100644
--- a/tests/ui/issues/issue-72839-error-overflow.stderr
+++ b/tests/ui/trait-bounds/trait-selection-overflow-prevention-72839.stderr
@@ -1,5 +1,5 @@
 error[E0425]: cannot find value `missing_var` in this scope
-  --> $DIR/issue-72839-error-overflow.rs:18:8
+  --> $DIR/trait-selection-overflow-prevention-72839.rs:19:8
    |
 LL |     if missing_var % 8 == 0 {}
    |        ^^^^^^^^^^^ not found in this scope
diff --git a/tests/ui/issues/issue-47638.rs b/tests/ui/trait-objects/trait-object-lifetime-conversion-47638.rs
index e5a51ce0c06..c70dc74f3e5 100644
--- a/tests/ui/issues/issue-47638.rs
+++ b/tests/ui/trait-objects/trait-object-lifetime-conversion-47638.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/47638
 //@ run-pass
 #![allow(unused_variables)]
 fn id<'c, 'b>(f: &'c &'b dyn Fn(&i32)) -> &'c &'b dyn Fn(&'static i32) {
diff --git a/tests/ui/traits/const-traits/const-closure-issue-125866-error.rs b/tests/ui/traits/const-traits/const-closure-issue-125866-error.rs
new file mode 100644
index 00000000000..7a44920bb72
--- /dev/null
+++ b/tests/ui/traits/const-traits/const-closure-issue-125866-error.rs
@@ -0,0 +1,24 @@
+#![allow(incomplete_features)]
+#![feature(const_closures, const_trait_impl)]
+
+const fn create_array<const N: usize>(mut f: impl FnMut(usize) -> u32 + Copy) -> [u32; N] {
+    let mut array = [0; N];
+    let mut i = 0;
+    loop {
+        array[i] = f(i);
+        //~^ ERROR the trait bound `impl FnMut(usize) -> u32 + Copy: [const] FnMut(usize)` is not satisfied [E0277]
+        i += 1;
+        if i == N {
+            break;
+        }
+    }
+    array
+}
+
+fn main() {
+    let x = create_array(const |i| 2 * i as u32);
+    assert_eq!(x, [0, 2, 4, 6, 8]);
+
+    let y = create_array(const |i| 2 * i as u32 + 1);
+    assert_eq!(y, [1, 3, 5, 7, 9]);
+}
diff --git a/tests/ui/traits/const-traits/const-closure-issue-125866-error.stderr b/tests/ui/traits/const-traits/const-closure-issue-125866-error.stderr
new file mode 100644
index 00000000000..1eadd1d8426
--- /dev/null
+++ b/tests/ui/traits/const-traits/const-closure-issue-125866-error.stderr
@@ -0,0 +1,11 @@
+error[E0277]: the trait bound `impl FnMut(usize) -> u32 + Copy: [const] FnMut(usize)` is not satisfied
+  --> $DIR/const-closure-issue-125866-error.rs:8:22
+   |
+LL |         array[i] = f(i);
+   |                    - ^
+   |                    |
+   |                    required by a bound introduced by this call
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/tests/ui/traits/const-traits/const-closure-issue-125866-pass.rs b/tests/ui/traits/const-traits/const-closure-issue-125866-pass.rs
new file mode 100644
index 00000000000..af7375172e6
--- /dev/null
+++ b/tests/ui/traits/const-traits/const-closure-issue-125866-pass.rs
@@ -0,0 +1,25 @@
+//@ check-pass
+
+#![allow(incomplete_features)]
+#![feature(const_closures, const_trait_impl)]
+
+const fn create_array<const N: usize>(mut f: impl [const] FnMut(usize) -> u32 + Copy) -> [u32; N] {
+    let mut array = [0; N];
+    let mut i = 0;
+    loop {
+        array[i] = f(i);
+        i += 1;
+        if i == N {
+            break;
+        }
+    }
+    array
+}
+
+fn main() {
+    let x = create_array(const |i| 2 * i as u32);
+    assert_eq!(x, [0, 2, 4, 6, 8]);
+
+    let y = create_array(const |i| 2 * i as u32 + 1);
+    assert_eq!(y, [1, 3, 5, 7, 9]);
+}
diff --git a/tests/ui/traits/const-traits/const-fn-trait-bound-issue-104314.rs b/tests/ui/traits/const-traits/const-fn-trait-bound-issue-104314.rs
new file mode 100644
index 00000000000..09c89c9cecd
--- /dev/null
+++ b/tests/ui/traits/const-traits/const-fn-trait-bound-issue-104314.rs
@@ -0,0 +1,13 @@
+//@ check-pass
+
+#![feature(const_trait_impl, const_destruct, const_clone)]
+
+use std::marker::Destruct;
+
+const fn f<T, F: [const] Fn(&T) -> T + [const] Destruct>(_: F) {}
+
+const fn g<T: [const] Clone>() {
+    f(<T as Clone>::clone);
+}
+
+fn main() {}
diff --git a/tests/ui/issues/issue-20413.rs b/tests/ui/traits/trait-impl-overflow-with-where-clause-20413.rs
index 138a235e675..e8c27ff5cc8 100644
--- a/tests/ui/issues/issue-20413.rs
+++ b/tests/ui/traits/trait-impl-overflow-with-where-clause-20413.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/20413
 trait Foo {
     fn answer(self);
 }
diff --git a/tests/ui/issues/issue-20413.stderr b/tests/ui/traits/trait-impl-overflow-with-where-clause-20413.stderr
index 42f3cd2d062..72aff1b9ee8 100644
--- a/tests/ui/issues/issue-20413.stderr
+++ b/tests/ui/traits/trait-impl-overflow-with-where-clause-20413.stderr
@@ -1,5 +1,5 @@
 error[E0392]: type parameter `T` is never used
-  --> $DIR/issue-20413.rs:5:15
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:6:15
    |
 LL | struct NoData<T>;
    |               ^ unused type parameter
@@ -8,14 +8,14 @@ LL | struct NoData<T>;
    = help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
 
 error[E0275]: overflow evaluating the requirement `NoData<NoData<NoData<NoData<NoData<NoData<NoData<...>>>>>>>: Foo`
-  --> $DIR/issue-20413.rs:8:36
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:9:36
    |
 LL | impl<T> Foo for T where NoData<T>: Foo {
    |                                    ^^^
    |
-   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_20413`)
+   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`trait_impl_overflow_with_where_clause_20413`)
 note: required for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>` to implement `Foo`
-  --> $DIR/issue-20413.rs:8:9
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:9:9
    |
 LL | impl<T> Foo for T where NoData<T>: Foo {
    |         ^^^     ^                  --- unsatisfied trait bound introduced here
@@ -23,19 +23,19 @@ LL | impl<T> Foo for T where NoData<T>: Foo {
    = note: required for `NoData<T>` to implement `Foo`
 
 error[E0275]: overflow evaluating the requirement `AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<...>>>>>>>: Bar`
-  --> $DIR/issue-20413.rs:27:42
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:28:42
    |
 LL | impl<T> Bar for T where EvenLessData<T>: Baz {
    |                                          ^^^
    |
-   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_20413`)
+   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`trait_impl_overflow_with_where_clause_20413`)
 note: required for `EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>` to implement `Baz`
-  --> $DIR/issue-20413.rs:34:9
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:35:9
    |
 LL | impl<T> Baz for T where AlmostNoData<T>: Bar {
    |         ^^^     ^                        --- unsatisfied trait bound introduced here
 note: required for `AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>` to implement `Bar`
-  --> $DIR/issue-20413.rs:27:9
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:28:9
    |
 LL | impl<T> Bar for T where EvenLessData<T>: Baz {
    |         ^^^     ^                        --- unsatisfied trait bound introduced here
@@ -43,19 +43,19 @@ LL | impl<T> Bar for T where EvenLessData<T>: Baz {
    = note: required for `EvenLessData<T>` to implement `Baz`
 
 error[E0275]: overflow evaluating the requirement `EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<...>>>>>>>: Baz`
-  --> $DIR/issue-20413.rs:34:42
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:35:42
    |
 LL | impl<T> Baz for T where AlmostNoData<T>: Bar {
    |                                          ^^^
    |
-   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_20413`)
+   = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`trait_impl_overflow_with_where_clause_20413`)
 note: required for `AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>` to implement `Bar`
-  --> $DIR/issue-20413.rs:27:9
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:28:9
    |
 LL | impl<T> Bar for T where EvenLessData<T>: Baz {
    |         ^^^     ^                        --- unsatisfied trait bound introduced here
 note: required for `EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<EvenLessData<AlmostNoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>` to implement `Baz`
-  --> $DIR/issue-20413.rs:34:9
+  --> $DIR/trait-impl-overflow-with-where-clause-20413.rs:35:9
    |
 LL | impl<T> Baz for T where AlmostNoData<T>: Bar {
    |         ^^^     ^                        --- unsatisfied trait bound introduced here
diff --git a/tests/ui/issues/issue-51632-try-desugar-incompatible-types.rs b/tests/ui/try-trait/incompatible-types-with-question-mark-51632.rs
index 35402dff675..4b2081d14d0 100644
--- a/tests/ui/issues/issue-51632-try-desugar-incompatible-types.rs
+++ b/tests/ui/try-trait/incompatible-types-with-question-mark-51632.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/51632
 #![allow(dead_code)]
 
 fn missing_discourses() -> Result<isize, ()> {
diff --git a/tests/ui/issues/issue-51632-try-desugar-incompatible-types.stderr b/tests/ui/try-trait/incompatible-types-with-question-mark-51632.stderr
index 99fce1eeea6..c624605d76a 100644
--- a/tests/ui/issues/issue-51632-try-desugar-incompatible-types.stderr
+++ b/tests/ui/try-trait/incompatible-types-with-question-mark-51632.stderr
@@ -1,5 +1,5 @@
 error[E0308]: `?` operator has incompatible types
-  --> $DIR/issue-51632-try-desugar-incompatible-types.rs:8:5
+  --> $DIR/incompatible-types-with-question-mark-51632.rs:9:5
    |
 LL | fn forbidden_narratives() -> Result<isize, ()> {
    |                              ----------------- expected `Result<isize, ()>` because of return type
diff --git a/triagebot.toml b/triagebot.toml
index fefff78d64e..e8c15bb9bfd 100644
--- a/triagebot.toml
+++ b/triagebot.toml
@@ -287,6 +287,11 @@ trigger_files = [
     "compiler/rustc_codegen_llvm/src/llvm/enzyme_ffi.rs",
 ]
 
+[autolabel."F-explicit_tail_calls"]
+trigger_files = [
+    "tests/ui/explicit-tail-calls",
+]
+
 [autolabel."T-rustdoc-frontend"]
 trigger_labels = [
     "A-rustdoc-search",