ls_colors: don't crash on non posix strings

1 files changed, 2 insertions, 1 deletions

diff --git a/fff b/fff
index c5ae5b8..a4124fb 100755
--- a/fff
+++ b/fff
@@ -207,7 +207,8 @@ print_line() {
 
     # Color files that end in a pattern as defined in LS_COLORS.
     # 'BASH_REMATCH' is an array that stores each REGEX match.
-    elif [[ $file_name =~ .*($ls_patterns)$ ]]; then
+    elif [[ $file_name =~ [a-zA-Z_][a-zA-Z0-9_]*$ &&
+            $file_name =~ .*($ls_patterns)$ ]]; then
         # Dynamically use the variable 'file_${BASH_REMATCH[1]}'
         # which stores the color from LS_COLORS.
         file_ext="file_${BASH_REMATCH[1]}"