Fix signal handler types.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

zulip/integrations/jabber/jabber_mirror.py

@@ -6,11 +6,12 @@ import subprocess
 import sys
 import traceback
 from types import FrameType
+from typing import Optional
 
 from zulip import RandomExponentialBackoff
 
 
-def die(signal: int, frame: FrameType) -> None:
+def die(signal: int, frame: Optional[FrameType]) -> None:
     """We actually want to exit, so run os._exit (so as not to be caught and restarted)"""
     os._exit(1)
 

zulip/integrations/zephyr/zephyr_mirror.py

@@ -6,16 +6,16 @@ import signal
 import subprocess
 import sys
 import traceback
+from types import FrameType
+from typing import Optional
 
 sys.path[:0] = [os.path.dirname(__file__)]
 from zephyr_mirror_backend import parse_args
 
 (options, args) = parse_args()
 
-from types import FrameType
 
-
-def die(signal: int, frame: FrameType) -> None:
+def die(signal: int, frame: Optional[FrameType]) -> None:
     # We actually want to exit, so run os._exit (so as not to be caught and restarted)
     os._exit(1)
 

zulip/integrations/zephyr/zephyr_mirror_backend.py

@@ -1238,7 +1238,7 @@ def parse_args() -> Tuple[optparse.Values, List[str]]:
     return parser.parse_args()
 
 
-def die_gracefully(signal: int, frame: FrameType) -> None:
+def die_gracefully(signal: int, frame: Optional[FrameType]) -> None:
     if CURRENT_STATE == States.ZulipToZephyr:
         # this is a child process, so we want os._exit (no clean-up necessary)
         os._exit(1)