diff --git a/bin/bash-back b/bin/bash-back
index beb281c..dc1f996 100755
--- a/bin/bash-back
+++ b/bin/bash-back
@@ -88,7 +88,7 @@ function on_exit {
       # lib/utility.bash # which contains error
       # ```
       regex="^	.*:[0-9]*	.*\$"
-      [[ "$last_error" =~ $regex ]] || stack_summary+=("ERROR $code: <undefined>")
+      [[ "$last_error" =~ $regex ]] || stack_summary+=("ERROR $code:") # <undefined>
     fi
 
     for i in "${!stack_functions[@]}"; do