ext/stack_trace/argument.c in stack_trace-0.6.0 vs ext/stack_trace/argument.c in stack_trace-0.7.0

@@ -2,10 +2,10 @@
 
 void free_arguments(Argument *arguments, int count) {
   int i;
 
   for(i = 0; i < count; i++) {
-    free(arguments[i].value);
+    if(arguments[i].value != NULL) free(arguments[i].value);
   }
 
   free(arguments);
 }