diff --git a/a1/prog b/a1/prog
index ed39b41..8b4dbc3 100755
Binary files a/a1/prog and b/a1/prog differ
diff --git a/a1/program.c b/a1/program.c
index 92cd967..8798314 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -80,7 +80,11 @@ int main() {
             }
             char c = input[err - 1];
             if (c == ')' || c == ']' || c == '}' || c == '>') {
-                printf("Crossed bracket %c in %d, expected %c\n", c, err-1, getExpectedClosing(stack[top]));   
+		if (top <-1) {
+                    printf("Unexpected closing bracket %c at position %d\n", c, err-1);
+                } else {
+                    printf("Crossed bracket %c at position %d, expected %c\n", c, err-1, getExpectedClosing(stack[top]));
+                }
             } else {
                 printf("Unclosed bracket %c in %d\n", stack[top], err-1);
             }