1 files changed, 2 insertions, 0 deletions
diff --git a/src/util.c b/src/util.c
index 6eda622..a5bc860 100644
--- a/src/util.c
+++ b/src/util.c
@@ -40,6 +40,8 @@ trim(char * str)
   int begin = 0;
   int end = strlen(str) - 1;
 
+  if (end == -1) return;
+
   while (isspace((unsigned char) str[begin]))
       begin++;