Auto merge of #128761 - matthiaskrgr:rollup-5p1mlqq, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #124944 (On trait bound mismatch, detect multiple crate versions in dep tree)
 - #125048 (PinCoerceUnsized trait into core)
 - #128406 (implement BufReader::peek)
 - #128539 (Forbid unused unsafe in vxworks-specific std modules)
 - #128687 (interpret: refactor function call handling to be better-abstracted)
 - #128692 (Add a triagebot mention for `library/Cargo.lock`)
 - #128710 (Don't ICE when getting an input file name's stem fails)
 - #128718 (Consider `cfg_attr` checked by `CheckAttrVisitor`)
 - #128751 (std::thread: set_name implementation proposal for vxWorks.)

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

1 files changed, 7 insertions, 1 deletions

diff --git a/library/alloc/src/sync.rs b/library/alloc/src/sync.rs
index 3ad0dae77db..2c0d19b0ada 100644
--- a/library/alloc/src/sync.rs
+++ b/library/alloc/src/sync.rs
@@ -20,7 +20,7 @@ use core::marker::{PhantomData, Unsize};
 use core::mem::{self, align_of_val_raw, ManuallyDrop};
 use core::ops::{CoerceUnsized, Deref, DerefPure, DispatchFromDyn, Receiver};
 use core::panic::{RefUnwindSafe, UnwindSafe};
-use core::pin::Pin;
+use core::pin::{Pin, PinCoerceUnsized};
 use core::ptr::{self, NonNull};
 #[cfg(not(no_global_oom_handling))]
 use core::slice::from_raw_parts_mut;
@@ -2142,6 +2142,12 @@ impl<T: ?Sized, A: Allocator> Deref for Arc<T, A> {
     }
 }
 
+#[unstable(feature = "pin_coerce_unsized_trait", issue = "123430")]
+unsafe impl<T: ?Sized, A: Allocator> PinCoerceUnsized for Arc<T, A> {}
+
+#[unstable(feature = "pin_coerce_unsized_trait", issue = "123430")]
+unsafe impl<T: ?Sized, A: Allocator> PinCoerceUnsized for Weak<T, A> {}
+
 #[unstable(feature = "deref_pure_trait", issue = "87121")]
 unsafe impl<T: ?Sized, A: Allocator> DerefPure for Arc<T, A> {}