Auto merge of #93457 - matthiaskrgr:rollup-e43ry1l, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #88205 (Add Explanation For Error E0772)
 - #92274 (Add `intrinsics::const_deallocate`)
 - #93236 (Make `NonNull::new` `const`)
 - #93299 (Fix dot separator when there is no source link)
 - #93410 (kmc-solid: Implement `net::FileDesc::duplicate`)
 - #93424 (fix nit)
 - #93431 (remove unused `jemallocator` crate)
 - #93453 (Add GUI theme change test)

Failed merges:

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

17 files changed, 234 insertions, 9 deletions

diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
index d4701a25614..c547e12f5b6 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
@@ -72,7 +72,7 @@ ENV PATH="/node-v14.4.0-linux-x64/bin:${PATH}"
 # https://github.com/puppeteer/puppeteer/issues/375
 #
 # We also specify the version in case we need to update it to go around cache limitations.
-RUN npm install -g browser-ui-test@0.5.3 --unsafe-perm=true
+RUN npm install -g browser-ui-test@0.5.8 --unsafe-perm=true
 
 ENV RUST_CONFIGURE_ARGS \
   --build=x86_64-unknown-linux-gnu \
diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs
index 32e4a829184..0b6faa4b13e 100644
--- a/src/librustdoc/html/render/mod.rs
+++ b/src/librustdoc/html/render/mod.rs
@@ -1676,11 +1676,12 @@ fn render_rightside(
         containing_item.stable_since(tcx),
         const_stable_since,
     );
-    if has_stability {
+    let mut tmp_buf = Buffer::empty_from(w);
+    write_srclink(cx, item, &mut tmp_buf);
+    if has_stability && !tmp_buf.is_empty() {
         w.write_str(" · ");
     }
-
-    write_srclink(cx, item, w);
+    w.push_buffer(tmp_buf);
     w.write_str("</div>");
 }
 
diff --git a/src/test/rustdoc-gui/theme-change.goml b/src/test/rustdoc-gui/theme-change.goml
index 60d089ffa37..73edee64e43 100644
--- a/src/test/rustdoc-gui/theme-change.goml
+++ b/src/test/rustdoc-gui/theme-change.goml
@@ -9,3 +9,19 @@ click: "#theme-choices > button:last-child"
 wait-for: 500
 // should be the light theme so let's check the color
 assert-css: ("body", { "background-color": "rgb(255, 255, 255)" })
+
+goto: file://|DOC_PATH|/settings.html
+click: "#theme-light"
+wait-for: 500
+assert-css: ("body", { "background-color": "rgb(255, 255, 255)" })
+assert-local-storage: { "rustdoc-theme": "light" }
+
+click: "#theme-dark"
+wait-for: 500
+assert-css: ("body", { "background-color": "rgb(53, 53, 53)" })
+assert-local-storage: { "rustdoc-theme": "dark" }
+
+click: "#theme-ayu"
+wait-for: 500
+assert-css: ("body", { "background-color": "rgb(15, 20, 25)" })
+assert-local-storage: { "rustdoc-theme": "ayu" }
diff --git a/src/test/rustdoc/version-separator-without-source.rs b/src/test/rustdoc/version-separator-without-source.rs
new file mode 100644
index 00000000000..bffe5030a84
--- /dev/null
+++ b/src/test/rustdoc/version-separator-without-source.rs
@@ -0,0 +1,23 @@
+#![doc(html_no_source)]
+#![feature(staged_api)]
+#![stable(feature = "bar", since = "1.0")]
+#![crate_name = "foo"]
+
+// @has foo/fn.foo.html
+// @has - '//div[@class="main-heading"]/*[@class="out-of-band"]' '1.0 · '
+// @!has - '//div[@class="main-heading"]/*[@class="out-of-band"]' '1.0 · source · '
+#[stable(feature = "bar", since = "1.0")]
+pub fn foo() {}
+
+// @has foo/struct.Bar.html
+// @has - '//div[@class="main-heading"]/*[@class="out-of-band"]' '1.0 · '
+// @!has - '//div[@class="main-heading"]/*[@class="out-of-band"]' '1.0 · source · '
+#[stable(feature = "bar", since = "1.0")]
+pub struct Bar;
+
+impl Bar {
+    // @has - '//div[@id="method.bar"]/*[@class="rightside"]' '2.0'
+    // @!has - '//div[@id="method.bar"]/*[@class="rightside"]' '2.0 ·'
+    #[stable(feature = "foobar", since = "2.0")]
+    pub fn bar() {}
+}
diff --git a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.rs b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.rs
index 1a1d9a6d540..ac9e8b64b48 100644
--- a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.rs
+++ b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.rs
@@ -6,11 +6,10 @@ use std::intrinsics;
 const FOO: i32 = foo();
 const fn foo() -> i32 {
     unsafe {
-        let _ = intrinsics::const_allocate(4, 3) as * mut i32;
+        let _ = intrinsics::const_allocate(4, 3) as *mut i32;
         //~^ error: evaluation of constant value failed
     }
     1
-
 }
 
 fn main() {}
diff --git a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.stderr b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.stderr
index 74fb65ca1a6..2628a78455c 100644
--- a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.stderr
+++ b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.stderr
@@ -4,7 +4,7 @@ error[E0080]: evaluation of constant value failed
 LL | const FOO: i32 = foo();
    |                  ----- inside `FOO` at $DIR/alloc_intrinsic_errors.rs:6:18
 ...
-LL |         let _ = intrinsics::const_allocate(4, 3) as * mut i32;
+LL |         let _ = intrinsics::const_allocate(4, 3) as *mut i32;
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |                 |
    |                 align has to be a power of 2, `3` is not a power of 2
diff --git a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_zero_sized.rs b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_zero_sized.rs
new file mode 100644
index 00000000000..407e69d41a0
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_zero_sized.rs
@@ -0,0 +1,16 @@
+// run-pass
+#![feature(core_intrinsics)]
+#![feature(const_heap)]
+#![feature(inline_const)]
+
+use std::intrinsics;
+
+struct ZST;
+
+fn main() {
+    const {
+        unsafe {
+            let _ = intrinsics::const_allocate(0, 0) as *mut ZST;
+        }
+    }
+}
diff --git a/src/test/ui/consts/const-eval/heap/dealloc_intrinsic.rs b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic.rs
new file mode 100644
index 00000000000..aac90cd54cc
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic.rs
@@ -0,0 +1,36 @@
+// run-pass
+#![feature(core_intrinsics)]
+#![feature(const_heap)]
+#![feature(const_mut_refs)]
+
+use std::intrinsics;
+
+const _X: () = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4);
+    intrinsics::const_deallocate(ptr, 4, 4);
+};
+
+const Y: &u32 = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4) as *mut u32;
+    *ptr = 42;
+    &*ptr
+};
+
+const Z: &u32 = &42;
+
+const _Z: () = unsafe {
+    let ptr1 = Y as *const _ as *mut u8;
+    intrinsics::const_deallocate(ptr1, 4, 4); // nop
+    intrinsics::const_deallocate(ptr1, 2, 4); // nop
+    intrinsics::const_deallocate(ptr1, 4, 2); // nop
+
+    let ptr2 = Z as *const _ as *mut u8;
+    intrinsics::const_deallocate(ptr2, 4, 4); // nop
+    intrinsics::const_deallocate(ptr2, 2, 4); // nop
+    intrinsics::const_deallocate(ptr2, 4, 2); // nop
+};
+
+fn main() {
+    assert_eq!(*Y, 42);
+    assert_eq!(*Z, 42);
+}
diff --git a/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_dangling.rs b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_dangling.rs
new file mode 100644
index 00000000000..b6d89a58dce
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_dangling.rs
@@ -0,0 +1,22 @@
+#![feature(core_intrinsics)]
+#![feature(const_heap)]
+#![feature(const_mut_refs)]
+
+use std::intrinsics;
+
+const _X: &'static u8 = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4);
+    intrinsics::const_deallocate(ptr, 4, 4);
+    &*ptr
+    //~^ error: evaluation of constant value failed
+};
+
+const _Y: u8 = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4);
+    let reference = &*ptr;
+    intrinsics::const_deallocate(ptr, 4, 4);
+    *reference
+    //~^ error: evaluation of constant value failed
+};
+
+fn main() {}
diff --git a/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_dangling.stderr b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_dangling.stderr
new file mode 100644
index 00000000000..4eb1c42e1f7
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_dangling.stderr
@@ -0,0 +1,15 @@
+error[E0080]: evaluation of constant value failed
+  --> $DIR/dealloc_intrinsic_dangling.rs:10:5
+   |
+LL |     &*ptr
+   |     ^^^^^ pointer to alloc2 was dereferenced after this allocation got freed
+
+error[E0080]: evaluation of constant value failed
+  --> $DIR/dealloc_intrinsic_dangling.rs:18:5
+   |
+LL |     *reference
+   |     ^^^^^^^^^^ pointer to alloc4 was dereferenced after this allocation got freed
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_duplicate.rs b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_duplicate.rs
new file mode 100644
index 00000000000..4010b476990
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_duplicate.rs
@@ -0,0 +1,13 @@
+#![feature(core_intrinsics)]
+#![feature(const_heap)]
+
+use std::intrinsics;
+
+const _X: () = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4);
+    intrinsics::const_deallocate(ptr, 4, 4);
+    intrinsics::const_deallocate(ptr, 4, 4);
+    //~^ error: evaluation of constant value failed
+};
+
+fn main() {}
diff --git a/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_duplicate.stderr b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_duplicate.stderr
new file mode 100644
index 00000000000..8177a08504b
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_duplicate.stderr
@@ -0,0 +1,9 @@
+error[E0080]: evaluation of constant value failed
+  --> $DIR/dealloc_intrinsic_duplicate.rs:9:5
+   |
+LL |     intrinsics::const_deallocate(ptr, 4, 4);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ pointer to alloc2 was dereferenced after this allocation got freed
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_incorrect_layout.rs b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_incorrect_layout.rs
new file mode 100644
index 00000000000..031d70fdc88
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_incorrect_layout.rs
@@ -0,0 +1,29 @@
+#![feature(core_intrinsics)]
+#![feature(const_heap)]
+
+use std::intrinsics;
+
+const _X: () = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4);
+    intrinsics::const_deallocate(ptr, 4, 2);
+    //~^ error: evaluation of constant value failed
+};
+const _Y: () = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4);
+    intrinsics::const_deallocate(ptr, 2, 4);
+    //~^ error: evaluation of constant value failed
+};
+
+const _Z: () = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4);
+    intrinsics::const_deallocate(ptr, 3, 4);
+    //~^ error: evaluation of constant value failed
+};
+
+const _W: () = unsafe {
+    let ptr = intrinsics::const_allocate(4, 4);
+    intrinsics::const_deallocate(ptr, 4, 3);
+    //~^ error: evaluation of constant value failed
+};
+
+fn main() {}
diff --git a/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_incorrect_layout.stderr b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_incorrect_layout.stderr
new file mode 100644
index 00000000000..650b409b190
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_incorrect_layout.stderr
@@ -0,0 +1,27 @@
+error[E0080]: evaluation of constant value failed
+  --> $DIR/dealloc_intrinsic_incorrect_layout.rs:8:5
+   |
+LL |     intrinsics::const_deallocate(ptr, 4, 2);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: alloc2 has size 4 and alignment 4, but gave size 4 and alignment 2
+
+error[E0080]: evaluation of constant value failed
+  --> $DIR/dealloc_intrinsic_incorrect_layout.rs:13:5
+   |
+LL |     intrinsics::const_deallocate(ptr, 2, 4);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: alloc4 has size 4 and alignment 4, but gave size 2 and alignment 4
+
+error[E0080]: evaluation of constant value failed
+  --> $DIR/dealloc_intrinsic_incorrect_layout.rs:19:5
+   |
+LL |     intrinsics::const_deallocate(ptr, 3, 4);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: alloc6 has size 4 and alignment 4, but gave size 3 and alignment 4
+
+error[E0080]: evaluation of constant value failed
+  --> $DIR/dealloc_intrinsic_incorrect_layout.rs:25:5
+   |
+LL |     intrinsics::const_deallocate(ptr, 4, 3);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ align has to be a power of 2, `3` is not a power of 2
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_zero_sized.rs b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_zero_sized.rs
new file mode 100644
index 00000000000..84fb4d2ea87
--- /dev/null
+++ b/src/test/ui/consts/const-eval/heap/dealloc_intrinsic_zero_sized.rs
@@ -0,0 +1,17 @@
+// run-pass
+#![feature(core_intrinsics)]
+#![feature(const_heap)]
+#![feature(inline_const)]
+
+use std::intrinsics;
+
+fn main() {
+    const {
+        unsafe {
+            let ptr1 = intrinsics::const_allocate(0, 0);
+            let ptr2 = intrinsics::const_allocate(0, 0);
+            intrinsics::const_deallocate(ptr1, 0, 0);
+            intrinsics::const_deallocate(ptr2, 0, 0);
+        }
+    }
+}
diff --git a/src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound-needing-more-suggestions.stderr b/src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound-needing-more-suggestions.stderr
index 63d291ed7cd..b125eacfb6c 100644
--- a/src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound-needing-more-suggestions.stderr
+++ b/src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound-needing-more-suggestions.stderr
@@ -38,4 +38,5 @@ LL |     impl MyTrait for Box<dyn ObjectTrait<Assoc = i32> + '_> {
 
 error: aborting due to 4 previous errors
 
-For more information about this error, try `rustc --explain E0515`.
+Some errors have detailed explanations: E0515, E0772.
+For more information about an error, try `rustc --explain E0515`.
diff --git a/src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound.stderr b/src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound.stderr
index 55a1bbf18ab..ed094c1365c 100644
--- a/src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound.stderr
+++ b/src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound.stderr
@@ -131,4 +131,5 @@ LL |     impl MyTrait for Box<dyn ObjectTrait + '_> {
 
 error: aborting due to 6 previous errors
 
-For more information about this error, try `rustc --explain E0759`.
+Some errors have detailed explanations: E0759, E0772.
+For more information about an error, try `rustc --explain E0759`.