Auto merge of #96134 - Dylan-DPC:rollup-ejug3yq, r=Dylan-DPC

Rollup of 6 pull requests

Successful merges:

 - #95346 (Stablize `const_extern_fn` for "Rust" and "C")
 - #95933 (htmldocck: Compare HTML tree instead of plain text html)
 - #96105 (Make the debug output for `TargetSelection` less verbose)
 - #96112 (Strict provenance lint diagnostics improvements)
 - #96119 (update Miri)
 - #96124 (to_digit tweak)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

8 files changed, 137 insertions, 69 deletions

diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs
index 9534cc5f434..d7c29f6900a 100644
--- a/src/bootstrap/config.rs
+++ b/src/bootstrap/config.rs
@@ -221,7 +221,7 @@ impl FromStr for LlvmLibunwind {
     }
 }
 
-#[derive(Debug, Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct TargetSelection {
     pub triple: Interned<String>,
     file: Option<Interned<String>>,
@@ -276,6 +276,12 @@ impl fmt::Display for TargetSelection {
     }
 }
 
+impl fmt::Debug for TargetSelection {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
 impl PartialEq<&str> for TargetSelection {
     fn eq(&self, other: &&str) -> bool {
         self.triple == *other
diff --git a/src/etc/htmldocck.py b/src/etc/htmldocck.py
index 6bb235b2c83..df215f31823 100644
--- a/src/etc/htmldocck.py
+++ b/src/etc/htmldocck.py
@@ -285,6 +285,11 @@ def flatten(node):
     return ''.join(acc)
 
 
+def make_xml(text):
+    xml = ET.XML('<xml>%s</xml>' % text)
+    return xml
+
+
 def normalize_xpath(path):
     path = path.replace("{{channel}}", channel)
     if path.startswith('//'):
@@ -401,7 +406,7 @@ def get_tree_count(tree, path):
     return len(tree.findall(path))
 
 
-def check_snapshot(snapshot_name, tree, normalize_to_text):
+def check_snapshot(snapshot_name, actual_tree, normalize_to_text):
     assert rust_test_path.endswith('.rs')
     snapshot_path = '{}.{}.{}'.format(rust_test_path[:-3], snapshot_name, 'html')
     try:
@@ -414,11 +419,15 @@ def check_snapshot(snapshot_name, tree, normalize_to_text):
             raise FailedCheck('No saved snapshot value')
 
     if not normalize_to_text:
-        actual_str = ET.tostring(tree).decode('utf-8')
+        actual_str = ET.tostring(actual_tree).decode('utf-8')
     else:
-        actual_str = flatten(tree)
+        actual_str = flatten(actual_tree)
+
+    if not expected_str \
+        or (not normalize_to_text and
+            not compare_tree(make_xml(actual_str), make_xml(expected_str), stderr)) \
+        or (normalize_to_text and actual_str != expected_str):
 
-    if expected_str != actual_str:
         if bless:
             with open(snapshot_path, 'w') as snapshot_file:
                 snapshot_file.write(actual_str)
@@ -430,6 +439,59 @@ def check_snapshot(snapshot_name, tree, normalize_to_text):
             print()
             raise FailedCheck('Actual snapshot value is different than expected')
 
+
+# Adapted from https://github.com/formencode/formencode/blob/3a1ba9de2fdd494dd945510a4568a3afeddb0b2e/formencode/doctest_xml_compare.py#L72-L120
+def compare_tree(x1, x2, reporter=None):
+    if x1.tag != x2.tag:
+        if reporter:
+            reporter('Tags do not match: %s and %s' % (x1.tag, x2.tag))
+        return False
+    for name, value in x1.attrib.items():
+        if x2.attrib.get(name) != value:
+            if reporter:
+                reporter('Attributes do not match: %s=%r, %s=%r'
+                         % (name, value, name, x2.attrib.get(name)))
+            return False
+    for name in x2.attrib:
+        if name not in x1.attrib:
+            if reporter:
+                reporter('x2 has an attribute x1 is missing: %s'
+                         % name)
+            return False
+    if not text_compare(x1.text, x2.text):
+        if reporter:
+            reporter('text: %r != %r' % (x1.text, x2.text))
+        return False
+    if not text_compare(x1.tail, x2.tail):
+        if reporter:
+            reporter('tail: %r != %r' % (x1.tail, x2.tail))
+        return False
+    cl1 = list(x1)
+    cl2 = list(x2)
+    if len(cl1) != len(cl2):
+        if reporter:
+            reporter('children length differs, %i != %i'
+                     % (len(cl1), len(cl2)))
+        return False
+    i = 0
+    for c1, c2 in zip(cl1, cl2):
+        i += 1
+        if not compare_tree(c1, c2, reporter=reporter):
+            if reporter:
+                reporter('children %i do not match: %s'
+                         % (i, c1.tag))
+            return False
+    return True
+
+
+def text_compare(t1, t2):
+    if not t1 and not t2:
+        return True
+    if t1 == '*' or t2 == '*':
+        return True
+    return (t1 or '').strip() == (t2 or '').strip()
+
+
 def stderr(*args):
     if sys.version_info.major < 3:
         file = codecs.getwriter('utf-8')(sys.stderr)
diff --git a/src/test/ui/consts/const-extern-fn/feature-gate-const_extern_fn.rs b/src/test/ui/consts/const-extern-fn/feature-gate-const_extern_fn.rs
index 5667d553527..f7bed91b037 100644
--- a/src/test/ui/consts/const-extern-fn/feature-gate-const_extern_fn.rs
+++ b/src/test/ui/consts/const-extern-fn/feature-gate-const_extern_fn.rs
@@ -1,10 +1,13 @@
-// Check that `const extern fn` and `const unsafe extern fn` are feature-gated.
+// Check that `const extern fn` and `const unsafe extern fn` are feature-gated
+// for certain ABIs.
 
-const extern fn foo1() {} //~ ERROR `const extern fn` definitions are unstable
-const extern "C" fn foo2() {} //~ ERROR `const extern fn` definitions are unstable
-const extern "Rust" fn foo3() {} //~ ERROR `const extern fn` definitions are unstable
-const unsafe extern fn bar1() {} //~ ERROR `const extern fn` definitions are unstable
-const unsafe extern "C" fn bar2() {} //~ ERROR `const extern fn` definitions are unstable
-const unsafe extern "Rust" fn bar3() {} //~ ERROR `const extern fn` definitions are unstable
+const extern fn foo1() {}
+const extern "C" fn foo2() {}
+const extern "Rust" fn foo3() {}
+const extern "cdecl" fn foo4() {} //~ ERROR `cdecl` as a `const fn` ABI is unstable
+const unsafe extern fn bar1() {}
+const unsafe extern "C" fn bar2() {}
+const unsafe extern "Rust" fn bar3() {}
+const unsafe extern "cdecl" fn bar4() {} //~ ERROR `cdecl` as a `const fn` ABI is unstable
 
 fn main() {}
diff --git a/src/test/ui/consts/const-extern-fn/feature-gate-const_extern_fn.stderr b/src/test/ui/consts/const-extern-fn/feature-gate-const_extern_fn.stderr
index bd5940a3fd6..f8c3107bd22 100644
--- a/src/test/ui/consts/const-extern-fn/feature-gate-const_extern_fn.stderr
+++ b/src/test/ui/consts/const-extern-fn/feature-gate-const_extern_fn.stderr
@@ -1,57 +1,21 @@
-error[E0658]: `const extern fn` definitions are unstable
-  --> $DIR/feature-gate-const_extern_fn.rs:3:1
+error[E0658]: `cdecl` as a `const fn` ABI is unstable
+  --> $DIR/feature-gate-const_extern_fn.rs:7:14
    |
-LL | const extern fn foo1() {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^
+LL | const extern "cdecl" fn foo4() {}
+   |              ^^^^^^^
    |
    = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
    = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
 
-error[E0658]: `const extern fn` definitions are unstable
-  --> $DIR/feature-gate-const_extern_fn.rs:4:1
+error[E0658]: `cdecl` as a `const fn` ABI is unstable
+  --> $DIR/feature-gate-const_extern_fn.rs:11:21
    |
-LL | const extern "C" fn foo2() {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL | const unsafe extern "cdecl" fn bar4() {}
+   |                     ^^^^^^^
    |
    = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
    = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
 
-error[E0658]: `const extern fn` definitions are unstable
-  --> $DIR/feature-gate-const_extern_fn.rs:5:1
-   |
-LL | const extern "Rust" fn foo3() {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
-   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
-
-error[E0658]: `const extern fn` definitions are unstable
-  --> $DIR/feature-gate-const_extern_fn.rs:6:1
-   |
-LL | const unsafe extern fn bar1() {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
-   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
-
-error[E0658]: `const extern fn` definitions are unstable
-  --> $DIR/feature-gate-const_extern_fn.rs:7:1
-   |
-LL | const unsafe extern "C" fn bar2() {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
-   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
-
-error[E0658]: `const extern fn` definitions are unstable
-  --> $DIR/feature-gate-const_extern_fn.rs:8:1
-   |
-LL | const unsafe extern "Rust" fn bar3() {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
-   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable
-
-error: aborting due to 6 previous errors
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0658`.
diff --git a/src/test/ui/lint/lint-strict-provenance-fuzzy-casts.stderr b/src/test/ui/lint/lint-strict-provenance-fuzzy-casts.stderr
index e50d243b6ad..c85934aa3ba 100644
--- a/src/test/ui/lint/lint-strict-provenance-fuzzy-casts.stderr
+++ b/src/test/ui/lint/lint-strict-provenance-fuzzy-casts.stderr
@@ -13,7 +13,7 @@ LL | #![deny(fuzzy_provenance_casts)]
 help: use `.with_addr()` to adjust a valid pointer in the same allocation, to this address
    |
 LL |     let dangling = (...).with_addr(16_usize);
-   |                    ~~~~~~~~~~~~~~~~~~~~~~~~~
+   |                    ++++++++++++++++        ~
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/lint/lint-strict-provenance-lossy-casts.rs b/src/test/ui/lint/lint-strict-provenance-lossy-casts.rs
index 3690fbc904d..9799a053756 100644
--- a/src/test/ui/lint/lint-strict-provenance-lossy-casts.rs
+++ b/src/test/ui/lint/lint-strict-provenance-lossy-casts.rs
@@ -8,4 +8,11 @@ fn main() {
 
     let addr_32bit = &x as *const u8 as u32;
     //~^ ERROR under strict provenance it is considered bad style to cast pointer `*const u8` to integer `u32`
+
+    // don't add unnecessary parens in the suggestion
+    let ptr = &x as *const u8;
+    let ptr_addr = ptr as usize;
+    //~^ ERROR under strict provenance it is considered bad style to cast pointer `*const u8` to integer `usize`
+    let ptr_addr_32bit = ptr as u32;
+    //~^ ERROR under strict provenance it is considered bad style to cast pointer `*const u8` to integer `u32`
 }
diff --git a/src/test/ui/lint/lint-strict-provenance-lossy-casts.stderr b/src/test/ui/lint/lint-strict-provenance-lossy-casts.stderr
index e7a6c1837bd..05178b34b11 100644
--- a/src/test/ui/lint/lint-strict-provenance-lossy-casts.stderr
+++ b/src/test/ui/lint/lint-strict-provenance-lossy-casts.stderr
@@ -2,7 +2,7 @@ error: under strict provenance it is considered bad style to cast pointer `*cons
   --> $DIR/lint-strict-provenance-lossy-casts.rs:6:23
    |
 LL |     let addr: usize = &x as *const u8 as usize;
-   |                       ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `.addr()` to obtain the address of a pointer: `(&x as *const u8).addr()`
+   |                       ^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: the lint level is defined here
   --> $DIR/lint-strict-provenance-lossy-casts.rs:2:9
@@ -10,14 +10,42 @@ note: the lint level is defined here
 LL | #![deny(lossy_provenance_casts)]
    |         ^^^^^^^^^^^^^^^^^^^^^^
    = help: if you can't comply with strict provenance and need to expose the pointer provenance you can use `.expose_addr()` instead
+help: use `.addr()` to obtain the address of a pointer
+   |
+LL |     let addr: usize = (&x as *const u8).addr();
+   |                       +               ~~~~~~~~
 
 error: under strict provenance it is considered bad style to cast pointer `*const u8` to integer `u32`
   --> $DIR/lint-strict-provenance-lossy-casts.rs:9:22
    |
 LL |     let addr_32bit = &x as *const u8 as u32;
-   |                      ^^^^^^^^^^^^^^^^^^^^^^ help: use `.addr()` to obtain the address of a pointer: `(&x as *const u8).addr() as u32`
+   |                      ^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: if you can't comply with strict provenance and need to expose the pointer provenance you can use `.expose_addr()` instead
+help: use `.addr()` to obtain the address of a pointer
+   |
+LL |     let addr_32bit = (&x as *const u8).addr() as u32;
+   |                      +               ~~~~~~~~~~~~~~~
+
+error: under strict provenance it is considered bad style to cast pointer `*const u8` to integer `usize`
+  --> $DIR/lint-strict-provenance-lossy-casts.rs:14:20
+   |
+LL |     let ptr_addr = ptr as usize;
+   |                    ^^^---------
+   |                       |
+   |                       help: use `.addr()` to obtain the address of a pointer: `.addr()`
+   |
+   = help: if you can't comply with strict provenance and need to expose the pointer provenance you can use `.expose_addr()` instead
+
+error: under strict provenance it is considered bad style to cast pointer `*const u8` to integer `u32`
+  --> $DIR/lint-strict-provenance-lossy-casts.rs:16:26
+   |
+LL |     let ptr_addr_32bit = ptr as u32;
+   |                          ^^^-------
+   |                             |
+   |                             help: use `.addr()` to obtain the address of a pointer: `.addr() as u32`
    |
    = help: if you can't comply with strict provenance and need to expose the pointer provenance you can use `.expose_addr()` instead
 
-error: aborting due to 2 previous errors
+error: aborting due to 4 previous errors
 
diff --git a/src/tools/miri b/src/tools/miri
-Subproject c568f32f165d86aba51ec544756c3c833acbabd
+Subproject 1ef91e122775060acb1fbda2c9a366891af3ea8