Auto merge of #130303 - Zalathar:rollup-8vsqdox, r=Zalathar

Rollup of 3 pull requests

Successful merges:

 - #130245 (make basic allocation functions track_caller in Miri for nicer backtraces)
 - #130261 (skip target sanity check when it's a `local-rebuild`)
 - #130287 (rustdoc: rename `issue-\d+.rs` tests to have meaningful names (part 9))

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

tests/fail/alloc/deallocate-bad-alignment.rs

@@ -1,10 +1,8 @@
 use std::alloc::{alloc, dealloc, Layout};
 
-//@error-in-other-file: has size 1 and alignment 1, but gave size 1 and alignment 2
-
 fn main() {
     unsafe {
         let x = alloc(Layout::from_size_align_unchecked(1, 1));
-        dealloc(x, Layout::from_size_align_unchecked(1, 2));
+        dealloc(x, Layout::from_size_align_unchecked(1, 2)); //~ERROR: has size 1 and alignment 1, but gave size 1 and alignment 2
     }
 }

tests/fail/alloc/deallocate-bad-alignment.stderr

@@ -1,18 +1,13 @@
 error: Undefined Behavior: incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 1 and alignment ALIGN
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> $DIR/deallocate-bad-alignment.rs:LL:CC
    |
-LL |     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 1 and alignment ALIGN
+LL |         dealloc(x, Layout::from_size_align_unchecked(1, 2));
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 1 and alignment ALIGN
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
    = note: BACKTRACE:
-   = note: inside `std::alloc::dealloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-note: inside `main`
-  --> $DIR/deallocate-bad-alignment.rs:LL:CC
-   |
-LL |         dealloc(x, Layout::from_size_align_unchecked(1, 2));
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: inside `main` at $DIR/deallocate-bad-alignment.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 

tests/fail/alloc/deallocate-bad-size.rs

@@ -1,10 +1,8 @@
 use std::alloc::{alloc, dealloc, Layout};
 
-//@error-in-other-file: has size 1 and alignment 1, but gave size 2 and alignment 1
-
 fn main() {
     unsafe {
         let x = alloc(Layout::from_size_align_unchecked(1, 1));
-        dealloc(x, Layout::from_size_align_unchecked(2, 1));
+        dealloc(x, Layout::from_size_align_unchecked(2, 1)); //~ERROR: has size 1 and alignment 1, but gave size 2 and alignment 1
     }
 }

tests/fail/alloc/deallocate-bad-size.stderr

@@ -1,18 +1,13 @@
 error: Undefined Behavior: incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 2 and alignment ALIGN
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> $DIR/deallocate-bad-size.rs:LL:CC
    |
-LL |     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 2 and alignment ALIGN
+LL |         dealloc(x, Layout::from_size_align_unchecked(2, 1));
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 2 and alignment ALIGN
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
    = note: BACKTRACE:
-   = note: inside `std::alloc::dealloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-note: inside `main`
-  --> $DIR/deallocate-bad-size.rs:LL:CC
-   |
-LL |         dealloc(x, Layout::from_size_align_unchecked(2, 1));
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: inside `main` at $DIR/deallocate-bad-size.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 

tests/fail/alloc/deallocate-twice.rs

@@ -1,11 +1,9 @@
 use std::alloc::{alloc, dealloc, Layout};
 
-//@error-in-other-file: has been freed
-
 fn main() {
     unsafe {
         let x = alloc(Layout::from_size_align_unchecked(1, 1));
         dealloc(x, Layout::from_size_align_unchecked(1, 1));
-        dealloc(x, Layout::from_size_align_unchecked(1, 1));
+        dealloc(x, Layout::from_size_align_unchecked(1, 1)); //~ERROR: has been freed
     }
 }

tests/fail/alloc/deallocate-twice.stderr

@@ -1,8 +1,8 @@
 error: Undefined Behavior: memory access failed: ALLOC has been freed, so this pointer is dangling
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> $DIR/deallocate-twice.rs:LL:CC
    |
-LL |     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ memory access failed: ALLOC has been freed, so this pointer is dangling
+LL |         dealloc(x, Layout::from_size_align_unchecked(1, 1));
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ memory access failed: ALLOC has been freed, so this pointer is dangling
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
@@ -17,12 +17,7 @@ help: ALLOC was deallocated here:
 LL |         dealloc(x, Layout::from_size_align_unchecked(1, 1));
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: BACKTRACE (of the first span):
-   = note: inside `std::alloc::dealloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-note: inside `main`
-  --> $DIR/deallocate-twice.rs:LL:CC
-   |
-LL |         dealloc(x, Layout::from_size_align_unchecked(1, 1));
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: inside `main` at $DIR/deallocate-twice.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 

tests/fail/alloc/reallocate-bad-size.rs

@@ -1,10 +1,8 @@
 use std::alloc::{alloc, realloc, Layout};
 
-//@error-in-other-file: has size 1 and alignment 1, but gave size 2 and alignment 1
-
 fn main() {
     unsafe {
         let x = alloc(Layout::from_size_align_unchecked(1, 1));
-        let _y = realloc(x, Layout::from_size_align_unchecked(2, 1), 1);
+        let _y = realloc(x, Layout::from_size_align_unchecked(2, 1), 1); //~ERROR: has size 1 and alignment 1, but gave size 2 and alignment 1
     }
 }

tests/fail/alloc/reallocate-bad-size.stderr

@@ -1,18 +1,13 @@
 error: Undefined Behavior: incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 2 and alignment ALIGN
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> $DIR/reallocate-bad-size.rs:LL:CC
    |
-LL |     unsafe { __rust_realloc(ptr, layout.size(), layout.align(), new_size) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 2 and alignment ALIGN
+LL |         let _y = realloc(x, Layout::from_size_align_unchecked(2, 1), 1);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect layout on deallocation: ALLOC has size 1 and alignment ALIGN, but gave size 2 and alignment ALIGN
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
    = note: BACKTRACE:
-   = note: inside `std::alloc::realloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-note: inside `main`
-  --> $DIR/reallocate-bad-size.rs:LL:CC
-   |
-LL |         let _y = realloc(x, Layout::from_size_align_unchecked(2, 1), 1);
-   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: inside `main` at $DIR/reallocate-bad-size.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 

tests/fail/alloc/reallocate-dangling.rs

@@ -1,11 +1,9 @@
 use std::alloc::{alloc, dealloc, realloc, Layout};
 
-//@error-in-other-file: has been freed
-
 fn main() {
     unsafe {
         let x = alloc(Layout::from_size_align_unchecked(1, 1));
         dealloc(x, Layout::from_size_align_unchecked(1, 1));
-        let _z = realloc(x, Layout::from_size_align_unchecked(1, 1), 1);
+        let _z = realloc(x, Layout::from_size_align_unchecked(1, 1), 1); //~ERROR: has been freed
     }
 }

tests/fail/alloc/reallocate-dangling.stderr

@@ -1,8 +1,8 @@
 error: Undefined Behavior: memory access failed: ALLOC has been freed, so this pointer is dangling
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> $DIR/reallocate-dangling.rs:LL:CC
    |
-LL |     unsafe { __rust_realloc(ptr, layout.size(), layout.align(), new_size) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ memory access failed: ALLOC has been freed, so this pointer is dangling
+LL |         let _z = realloc(x, Layout::from_size_align_unchecked(1, 1), 1);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ memory access failed: ALLOC has been freed, so this pointer is dangling
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
@@ -17,12 +17,7 @@ help: ALLOC was deallocated here:
 LL |         dealloc(x, Layout::from_size_align_unchecked(1, 1));
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: BACKTRACE (of the first span):
-   = note: inside `std::alloc::realloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-note: inside `main`
-  --> $DIR/reallocate-dangling.rs:LL:CC
-   |
-LL |         let _z = realloc(x, Layout::from_size_align_unchecked(1, 1), 1);
-   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: inside `main` at $DIR/reallocate-dangling.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 

tests/fail/alloc/stack_free.stderr

@@ -1,14 +1,12 @@
 error: Undefined Behavior: deallocating ALLOC, which is stack variable memory, using Rust heap deallocation operation
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> RUSTLIB/alloc/src/boxed.rs:LL:CC
    |
-LL |     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocating ALLOC, which is stack variable memory, using Rust heap deallocation operation
+LL |                 self.1.deallocate(From::from(ptr.cast()), layout);
+   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocating ALLOC, which is stack variable memory, using Rust heap deallocation operation
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
    = note: BACKTRACE:
-   = note: inside `std::alloc::dealloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `<std::alloc::Global as std::alloc::Allocator>::deallocate` at RUSTLIB/alloc/src/alloc.rs:LL:CC
    = note: inside `<std::boxed::Box<i32> as std::ops::Drop>::drop` at RUSTLIB/alloc/src/boxed.rs:LL:CC
    = note: inside `std::ptr::drop_in_place::<std::boxed::Box<i32>> - shim(Some(std::boxed::Box<i32>))` at RUSTLIB/core/src/ptr/mod.rs:LL:CC
    = note: inside `std::mem::drop::<std::boxed::Box<i32>>` at RUSTLIB/core/src/mem/mod.rs:LL:CC

tests/fail/both_borrows/newtype_pair_retagging.tree.stderr

@@ -1,8 +1,8 @@
 error: Undefined Behavior: deallocation through <TAG> at ALLOC[0x0] is forbidden
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> RUSTLIB/alloc/src/boxed.rs:LL:CC
    |
-LL |     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocation through <TAG> at ALLOC[0x0] is forbidden
+LL |                 self.1.deallocate(From::from(ptr.cast()), layout);
+   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocation through <TAG> at ALLOC[0x0] is forbidden
    |
    = help: this indicates a potential bug in the program: it performed an invalid operation, but the Tree Borrows rules it violated are still experimental
    = help: the accessed tag <TAG> is foreign to the protected tag <TAG> (i.e., it is not a child)
@@ -25,8 +25,6 @@ LL |             || drop(Box::from_raw(ptr)),
    |                     ^^^^^^^^^^^^^^^^^^
    = help: this transition corresponds to a temporary loss of write permissions until function exit
    = note: BACKTRACE (of the first span):
-   = note: inside `std::alloc::dealloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `<std::alloc::Global as std::alloc::Allocator>::deallocate` at RUSTLIB/alloc/src/alloc.rs:LL:CC
    = note: inside `<std::boxed::Box<i32> as std::ops::Drop>::drop` at RUSTLIB/alloc/src/boxed.rs:LL:CC
    = note: inside `std::ptr::drop_in_place::<std::boxed::Box<i32>> - shim(Some(std::boxed::Box<i32>))` at RUSTLIB/core/src/ptr/mod.rs:LL:CC
    = note: inside `std::mem::drop::<std::boxed::Box<i32>>` at RUSTLIB/core/src/mem/mod.rs:LL:CC

tests/fail/both_borrows/newtype_retagging.tree.stderr

@@ -1,8 +1,8 @@
 error: Undefined Behavior: deallocation through <TAG> at ALLOC[0x0] is forbidden
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> RUSTLIB/alloc/src/boxed.rs:LL:CC
    |
-LL |     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocation through <TAG> at ALLOC[0x0] is forbidden
+LL |                 self.1.deallocate(From::from(ptr.cast()), layout);
+   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocation through <TAG> at ALLOC[0x0] is forbidden
    |
    = help: this indicates a potential bug in the program: it performed an invalid operation, but the Tree Borrows rules it violated are still experimental
    = help: the accessed tag <TAG> is foreign to the protected tag <TAG> (i.e., it is not a child)
@@ -25,8 +25,6 @@ LL |             || drop(Box::from_raw(ptr)),
    |                     ^^^^^^^^^^^^^^^^^^
    = help: this transition corresponds to a temporary loss of write permissions until function exit
    = note: BACKTRACE (of the first span):
-   = note: inside `std::alloc::dealloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `<std::alloc::Global as std::alloc::Allocator>::deallocate` at RUSTLIB/alloc/src/alloc.rs:LL:CC
    = note: inside `<std::boxed::Box<i32> as std::ops::Drop>::drop` at RUSTLIB/alloc/src/boxed.rs:LL:CC
    = note: inside `std::ptr::drop_in_place::<std::boxed::Box<i32>> - shim(Some(std::boxed::Box<i32>))` at RUSTLIB/core/src/ptr/mod.rs:LL:CC
    = note: inside `std::mem::drop::<std::boxed::Box<i32>>` at RUSTLIB/core/src/mem/mod.rs:LL:CC

tests/fail/both_borrows/zero-sized-protected.rs

@@ -1,13 +1,12 @@
 //@revisions: stack tree
 //@[tree]compile-flags: -Zmiri-tree-borrows
-//@[tree]error-in-other-file: /deallocation .* is forbidden/
 use std::alloc::{alloc, dealloc, Layout};
 
 // `x` is strongly protected but covers zero bytes.
 // Let's see if deallocating the allocation x points to is UB:
 // in TB, it is UB, but in SB it is not.
 fn test(_x: &mut (), ptr: *mut u8, l: Layout) {
-    unsafe { dealloc(ptr, l) };
+    unsafe { dealloc(ptr, l) }; //~[tree] ERROR: /deallocation .* is forbidden/
 }
 
 fn main() {

tests/fail/both_borrows/zero-sized-protected.tree.stderr

@@ -1,8 +1,8 @@
 error: Undefined Behavior: deallocation through <TAG> (root of the allocation) at ALLOC[0x0] is forbidden
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> $DIR/zero-sized-protected.rs:LL:CC
    |
-LL |     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocation through <TAG> (root of the allocation) at ALLOC[0x0] is forbidden
+LL |     unsafe { dealloc(ptr, l) };
+   |              ^^^^^^^^^^^^^^^ deallocation through <TAG> (root of the allocation) at ALLOC[0x0] is forbidden
    |
    = help: this indicates a potential bug in the program: it performed an invalid operation, but the Tree Borrows rules it violated are still experimental
    = help: the allocation of the accessed tag <TAG> (root of the allocation) also contains the strongly protected tag <TAG>
@@ -18,12 +18,7 @@ help: the strongly protected tag <TAG> was created here, in the initial state Re
 LL | fn test(_x: &mut (), ptr: *mut u8, l: Layout) {
    |         ^^
    = note: BACKTRACE (of the first span):
-   = note: inside `std::alloc::dealloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-note: inside `test`
-  --> $DIR/zero-sized-protected.rs:LL:CC
-   |
-LL |     unsafe { dealloc(ptr, l) };
-   |              ^^^^^^^^^^^^^^^
+   = note: inside `test` at $DIR/zero-sized-protected.rs:LL:CC
 note: inside `main`
   --> $DIR/zero-sized-protected.rs:LL:CC
    |

tests/fail/memleak.rs

@@ -1,6 +1,5 @@
-//@error-in-other-file: memory leaked
 //@normalize-stderr-test: ".*│.*" -> "$$stripped$$"
 
 fn main() {
-    std::mem::forget(Box::new(42));
+    std::mem::forget(Box::new(42)); //~ERROR: memory leaked
 }

tests/fail/memleak.stderr

@@ -1,20 +1,11 @@
 error: memory leaked: ALLOC (Rust heap, size: 4, align: 4), allocated here:
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
-   |
-LL |         __rust_alloc(layout.size(), layout.align())
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: BACKTRACE:
-   = note: inside `std::alloc::alloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `std::alloc::Global::alloc_impl` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `<std::alloc::Global as std::alloc::Allocator>::allocate` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `alloc::alloc::exchange_malloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `std::boxed::Box::<i32>::new` at RUSTLIB/alloc/src/boxed.rs:LL:CC
-note: inside `main`
   --> $DIR/memleak.rs:LL:CC
    |
 LL |     std::mem::forget(Box::new(42));
    |                      ^^^^^^^^^^^^
+   |
+   = note: BACKTRACE:
+   = note: inside `main` at $DIR/memleak.rs:LL:CC
 
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 

tests/fail/memleak_rc.stderr

@@ -1,15 +1,10 @@
 error: memory leaked: ALLOC (Rust heap, SIZE, ALIGN), allocated here:
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> RUSTLIB/alloc/src/rc.rs:LL:CC
    |
-LL |         __rust_alloc(layout.size(), layout.align())
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |                 Box::leak(Box::new(RcBox { strong: Cell::new(1), weak: Cell::new(1), value }))
+   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: BACKTRACE:
-   = note: inside `std::alloc::alloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `std::alloc::Global::alloc_impl` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `<std::alloc::Global as std::alloc::Allocator>::allocate` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `alloc::alloc::exchange_malloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `std::boxed::Box::<std::rc::RcBox<std::cell::RefCell<std::option::Option<Dummy>>>>::new` at RUSTLIB/alloc/src/boxed.rs:LL:CC
    = note: inside `std::rc::Rc::<std::cell::RefCell<std::option::Option<Dummy>>>::new` at RUSTLIB/alloc/src/rc.rs:LL:CC
 note: inside `main`
   --> $DIR/memleak_rc.rs:LL:CC

tests/fail/stacked_borrows/deallocate_against_protector1.stderr

@@ -1,14 +1,12 @@
 error: Undefined Behavior: deallocating while item [Unique for <TAG>] is strongly protected
-  --> RUSTLIB/alloc/src/alloc.rs:LL:CC
+  --> RUSTLIB/alloc/src/boxed.rs:LL:CC
    |
-LL |     unsafe { __rust_dealloc(ptr, layout.size(), layout.align()) }
-   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocating while item [Unique for <TAG>] is strongly protected
+LL |                 self.1.deallocate(From::from(ptr.cast()), layout);
+   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ deallocating while item [Unique for <TAG>] is strongly protected
    |
    = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
    = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
    = note: BACKTRACE:
-   = note: inside `std::alloc::dealloc` at RUSTLIB/alloc/src/alloc.rs:LL:CC
-   = note: inside `<std::alloc::Global as std::alloc::Allocator>::deallocate` at RUSTLIB/alloc/src/alloc.rs:LL:CC
    = note: inside `<std::boxed::Box<i32> as std::ops::Drop>::drop` at RUSTLIB/alloc/src/boxed.rs:LL:CC
    = note: inside `std::ptr::drop_in_place::<std::boxed::Box<i32>> - shim(Some(std::boxed::Box<i32>))` at RUSTLIB/core/src/ptr/mod.rs:LL:CC
    = note: inside `std::mem::drop::<std::boxed::Box<i32>>` at RUSTLIB/core/src/mem/mod.rs:LL:CC