1 files changed, 2 insertions, 0 deletions
diff --git a/parse.c b/parse.c
index 78a5b1c..f64ffed 100644
--- a/parse.c
+++ b/parse.c
@@ -2016,6 +2016,8 @@ static void fprint_arg_exprs(FILE *out, Expression *args) {
 	fprintf(out, "(");
 	arr_foreach(args, Expression, arg) {
 		if (arg != args) fprintf(out, ", ");
+		Expression *last = arr_last(args);
+		assert(arg<=last);
 		fprint_expr(out, arg);
 	}
 	fprintf(out, ")");