Auto merge of #31359 - steveklabnik:rollup, r=steveklabnik

- Successful merges: #30971, #31202, #31247, #31270, #31281, #31327, #31339, #31340, #31342, #31344, #31345, #31346, #31348
- Failed merges:

3 files changed, 11 insertions, 11 deletions

diff --git a/src/libstd/sync/condvar.rs b/src/libstd/sync/condvar.rs
index 1f7fe820bf8..9a786752365 100644
--- a/src/libstd/sync/condvar.rs
+++ b/src/libstd/sync/condvar.rs
@@ -129,7 +129,7 @@ impl Condvar {
     /// the predicate must always be checked each time this function returns to
     /// protect against spurious wakeups.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// This function will return an error if the mutex being waited on is
     /// poisoned when this thread re-acquires the lock. For more information,
diff --git a/src/libstd/sync/mutex.rs b/src/libstd/sync/mutex.rs
index 6b20e51967d..fe9f0371abd 100644
--- a/src/libstd/sync/mutex.rs
+++ b/src/libstd/sync/mutex.rs
@@ -205,7 +205,7 @@ impl<T: ?Sized> Mutex<T> {
     /// held. An RAII guard is returned to allow scoped unlock of the lock. When
     /// the guard goes out of scope, the mutex will be unlocked.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// If another user of this mutex panicked while holding the mutex, then
     /// this call will return an error once the mutex is acquired.
@@ -223,7 +223,7 @@ impl<T: ?Sized> Mutex<T> {
     ///
     /// This function does not block.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// If another user of this mutex panicked while holding the mutex, then
     /// this call will return failure if the mutex would otherwise be
@@ -250,7 +250,7 @@ impl<T: ?Sized> Mutex<T> {
 
     /// Consumes this mutex, returning the underlying data.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// If another user of this mutex panicked while holding the mutex, then
     /// this call will return an error instead.
@@ -280,7 +280,7 @@ impl<T: ?Sized> Mutex<T> {
     /// Since this call borrows the `Mutex` mutably, no actual locking needs to
     /// take place---the mutable borrow statically guarantees no locks exist.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// If another user of this mutex panicked while holding the mutex, then
     /// this call will return an error instead.
diff --git a/src/libstd/sync/rwlock.rs b/src/libstd/sync/rwlock.rs
index 3dbef435481..63ef7732ad6 100644
--- a/src/libstd/sync/rwlock.rs
+++ b/src/libstd/sync/rwlock.rs
@@ -169,7 +169,7 @@ impl<T: ?Sized> RwLock<T> {
     /// Returns an RAII guard which will release this thread's shared access
     /// once it is dropped.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// This function will return an error if the RwLock is poisoned. An RwLock
     /// is poisoned whenever a writer panics while holding an exclusive lock.
@@ -192,7 +192,7 @@ impl<T: ?Sized> RwLock<T> {
     /// This function does not provide any guarantees with respect to the ordering
     /// of whether contentious readers or writers will acquire the lock first.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// This function will return an error if the RwLock is poisoned. An RwLock
     /// is poisoned whenever a writer panics while holding an exclusive lock. An
@@ -217,7 +217,7 @@ impl<T: ?Sized> RwLock<T> {
     /// Returns an RAII guard which will drop the write access of this rwlock
     /// when dropped.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// This function will return an error if the RwLock is poisoned. An RwLock
     /// is poisoned whenever a writer panics while holding an exclusive lock.
@@ -240,7 +240,7 @@ impl<T: ?Sized> RwLock<T> {
     /// This function does not provide any guarantees with respect to the ordering
     /// of whether contentious readers or writers will acquire the lock first.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// This function will return an error if the RwLock is poisoned. An RwLock
     /// is poisoned whenever a writer panics while holding an exclusive lock. An
@@ -269,7 +269,7 @@ impl<T: ?Sized> RwLock<T> {
 
     /// Consumes this `RwLock`, returning the underlying data.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// This function will return an error if the RwLock is poisoned. An RwLock
     /// is poisoned whenever a writer panics while holding an exclusive lock. An
@@ -301,7 +301,7 @@ impl<T: ?Sized> RwLock<T> {
     /// Since this call borrows the `RwLock` mutably, no actual locking needs to
     /// take place---the mutable borrow statically guarantees no locks exist.
     ///
-    /// # Failure
+    /// # Errors
     ///
     /// This function will return an error if the RwLock is poisoned. An RwLock
     /// is poisoned whenever a writer panics while holding an exclusive lock. An