1 files changed, 3 insertions, 0 deletions
diff --git a/hence.c b/hence.c
index fbcb917..1fcd835 100644
--- a/hence.c
+++ b/hence.c
@@ -24,6 +24,9 @@ int main(int argc, char **argv) {
 	}
 
 	struct token *tok = lex_file(argv[1], fd);
+	if (!tok) {
+		return 1;
+	}
 	int p = parse(argv[1], fd, tok);
 
 //	gate_set_input("a", LOGIC_LOW);