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-rw-r--r--src/buildstream/_signals.py3
1 files changed, 1 insertions, 2 deletions
diff --git a/src/buildstream/_signals.py b/src/buildstream/_signals.py
index 03b55b052..d760aaf71 100644
--- a/src/buildstream/_signals.py
+++ b/src/buildstream/_signals.py
@@ -21,11 +21,10 @@ import signal
import sys
import threading
import traceback
-from contextlib import contextmanager, ExitStack
from collections import deque
+from contextlib import ExitStack, contextmanager
from typing import Callable, Deque
-
# Global per process state for handling of sigterm/sigtstp/sigcont,
# note that it is expected that this only ever be used by new processes
# the scheduler starts, not the main process.