From 18eb696a176e34a64c31d5d3769c8be59bd221ed Mon Sep 17 00:00:00 2001
From: Thomas Waldmann <tw@waldmann-edv.de>
Date: Sun, 8 May 2022 18:46:13 +0200
Subject: [PATCH] fix create_filter_process exception handler, fixes #6681

if cmd was falsy (e.g. None), there is no proc.
then, if "yield stream" raises an exception, the exception handler crashed at "proc.kill()".
---
 src/borg/helpers/process.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/borg/helpers/process.py b/src/borg/helpers/process.py
index 7af8d5fcb..0cedcb7b7 100644
--- a/src/borg/helpers/process.py
+++ b/src/borg/helpers/process.py
@@ -332,7 +332,8 @@ def create_filter_process(cmd, stream, stream_close, inbound=True):
     except Exception:
         # something went wrong with processing the stream by borg
         logger.debug('Exception, killing the filter...')
-        proc.kill()
+        if cmd:
+            proc.kill()
         borg_succeeded = False
         raise
     else: