scc

commit 4aff072f0bc195635c23adeccf0f436df02ac890
parent e34631905f3dcfacb80f3e4cd3f9dca067980c5d
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Tue, 31 Mar 2026 18:23:38 +0200

cc1: Exit when we cannot discard

If the input parameter is null then we don't have any input
that we can discard, and it just generates a segfault because
the for loop assumes that the input parameter is different
than 0, but it still checks if it can ask for more input
using the function moreinput().

Diffstat:
M
src/cmd/scc-cc/cc1/lex.c
 | 
2
++

1 file changed, 2 insertions(+), 0 deletions(-)
diff --git a/src/cmd/scc-cc/cc1/lex.c b/src/cmd/scc-cc/cc1/lex.c
@@ -998,6 +998,8 @@ discard(void)
 	extern jmp_buf recover;
 	int c;
 
+	if (!input)
+		exit(EXIT_FAILURE);
 	for (c = yytoken; ; c = *input->p++) {
 		switch (safe) {
 		case END_COMP: