Stabilize poison API of Once, rename poisoned()

This stabilizes:

* `OnceState`
* `OnceState::is_poisoned()` (previously named `poisoned()`)
* `Once::call_once_force()`

`poisoned()` was renamed because the new name is more clear as a few
people agreed and nobody objected.

Closes #33577

1 files changed, 2 insertions, 2 deletions

diff --git a/library/std/src/sync/once/tests.rs b/library/std/src/sync/once/tests.rs
index fae2752526e..0c35597e11c 100644
--- a/library/std/src/sync/once/tests.rs
+++ b/library/std/src/sync/once/tests.rs
@@ -69,7 +69,7 @@ fn poison_bad() {
     let mut called = false;
     O.call_once_force(|p| {
         called = true;
-        assert!(p.poisoned())
+        assert!(p.is_poisoned())
     });
     assert!(called);
 
@@ -92,7 +92,7 @@ fn wait_for_force_to_finish() {
     let (tx2, rx2) = channel();
     let t1 = thread::spawn(move || {
         O.call_once_force(|p| {
-            assert!(p.poisoned());
+            assert!(p.is_poisoned());
             tx1.send(()).unwrap();
             rx2.recv().unwrap();
         });