Fixed asyncio lock.locked returning False when waiters exist

Author: Emerson Beckwith

Lib/asyncio/locks.py

@@ -84,8 +84,8 @@ def __repr__(self):
         return f'<{res[1:-1]} [{extra}]>'
 
     def locked(self):
-        """Return True if lock is acquired."""
-        return self._locked
+        """Return True if lock is acquired or if there are active waiters."""
+        return self._locked or self._waiters
 
     async def acquire(self):
         """Acquire a lock.

Lib/test/test_asyncio/test_locks.py

@@ -186,10 +186,11 @@ async def lockit(name, blocker):
         tb.cancel()
         self.assertTrue(lock._waiters[0].cancelled())
         await asyncio.sleep(0)
-        self.assertFalse(lock.locked())
+        self.assertTrue(lock.locked())
         self.assertTrue(ta.done())
         self.assertTrue(tb.cancelled())
         await tc
+        self.assertTrue(tc.done())
 
     async def test_cancel_release_race(self):
         # Issue 32734