Closes #19523: Merged fix from 3.3.

Lib/logging/__init__.py

@@ -990,8 +990,10 @@ class FileHandler(StreamHandler):
                 self.flush()
                 if hasattr(self.stream, "close"):
                     self.stream.close()
-                StreamHandler.close(self)
                 self.stream = None
+            # Issue #19523: call unconditionally to
+            # prevent a handler leak when delay is set
+            StreamHandler.close(self)
         finally:
             self.release()
 

Misc/NEWS

@@ -47,6 +47,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #19523: Closed FileHandler leak which occurred when delay was set.
+
 - Issue #19544 and #6516: Restore support for --user and --group parameters to
   sdist command accidentally rolled back as part of the distutils2 rollback.