Auto merge of #77198 - jonas-schievink:rollup-i59i41h, r=jonas-schievink

Rollup of 15 pull requests

Successful merges:

 - #76932 (Relax promises about condition variable.)
 - #76973 (Unstably allow assume intrinsic in const contexts)
 - #77005 (BtreeMap: refactoring around edges)
 - #77066 (Fix dest prop miscompilation around references)
 - #77073 (dead_code: look at trait impls even if they don't contain items)
 - #77086 (Include libunwind in the rust-src component.)
 - #77097 (Make [].as_[mut_]ptr_range() (unstably) const.)
 - #77106 (clarify that `changelog-seen = 1` goes to the beginning of config.toml)
 - #77120 (Add `--keep-stage-std` to `x.py` for keeping only standard library artifacts)
 - #77126 (Invalidate local LLVM cache less often)
 - #77146 (Install std for non-host targets)
 - #77155 (remove enum name from ImplSource variants)
 - #77176 (Removing erroneous semicolon in transmute documentation)
 - #77183 (Allow multiple allow_internal_unstable attributes)
 - #77189 (Remove extra space from vec drawing)

Failed merges:

r? `@ghost`

1 files changed, 5 insertions, 11 deletions

diff --git a/library/std/src/sync/condvar.rs b/library/std/src/sync/condvar.rs
index bc01c26a86a..7e2155dae6f 100644
--- a/library/std/src/sync/condvar.rs
+++ b/library/std/src/sync/condvar.rs
@@ -78,13 +78,9 @@ impl WaitTimeoutResult {
 /// and a mutex. The predicate is always verified inside of the mutex before
 /// determining that a thread must block.
 ///
-/// Functions in this module will block the current **thread** of execution and
-/// are bindings to system-provided condition variables where possible. Note
-/// that this module places one additional restriction over the system condition
-/// variables: each condvar can be used with precisely one mutex at runtime. Any
-/// attempt to use multiple mutexes on the same condition variable will result
-/// in a runtime panic. If this is not desired, then the unsafe primitives in
-/// `sys` do not have this restriction but may result in undefined behavior.
+/// Functions in this module will block the current **thread** of execution.
+/// Note that any attempt to use multiple mutexes on the same condition
+/// variable may result in a runtime panic.
 ///
 /// # Examples
 ///
@@ -159,10 +155,8 @@ impl Condvar {
     ///
     /// # Panics
     ///
-    /// This function will [`panic!`] if it is used with more than one mutex
-    /// over time. Each condition variable is dynamically bound to exactly one
-    /// mutex to ensure defined behavior across platforms. If this functionality
-    /// is not desired, then unsafe primitives in `sys` are provided.
+    /// This function may [`panic!`] if it is used with more than one mutex
+    /// over time.
     ///
     /// [`notify_one`]: Self::notify_one
     /// [`notify_all`]: Self::notify_all