scroll

commit faf0800f0b133607a8e3b5b807ab185c1b1c242b
parent ff2fbccd565b1f3e6f03cfc1fc4355a117af6faf
Author: Jochen Sprickerhof <git@jochen.sprickerhof.de>
Date:   Tue, 31 Mar 2020 19:34:31 +0200

Don't segfault when scrolling down with empty scrollback

Diffstat:
M
scroll.c
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scroll.c b/scroll.c
@@ -276,7 +276,7 @@ scrolldown(char *buf, size_t size)
 	int rows = ws.ws_row;
 
 	/* print one page */
-	for (; rows > 0 && TAILQ_PREV(bottom, tailhead, entries) != NULL; rows--) {
+	for (; rows > 0 && bottom != NULL && TAILQ_PREV(bottom, tailhead, entries) != NULL; rows--) {
 		bottom = TAILQ_PREV(bottom, tailhead, entries);
 		write(STDOUT_FILENO, bottom->buf, bottom->size);
 	}