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-rw-r--r--Completion/Base/Utility/_call_program4
1 files changed, 2 insertions, 2 deletions
diff --git a/Completion/Base/Utility/_call_program b/Completion/Base/Utility/_call_program
index b65764827..010e09476 100644
--- a/Completion/Base/Utility/_call_program
+++ b/Completion/Base/Utility/_call_program
@@ -2,8 +2,8 @@
 
 local tmp err_fd=-1
 
-if (( ${debug_fd:--1} > 2 ))
-then exec {err_fd}>&2	# debug_fd is saved stderr, 2 is log file
+if (( ${debug_fd:--1} > 2 )) || [[ ! -t 2 ]]
+then exec {err_fd}>&2	# debug_fd is saved stderr, 2 is trace or redirect
 else exec {err_fd}>/dev/null
 fi