X-Git-Url: https://gitweb.ps.run/ps-cgit/blobdiff_plain/2b9fab8d30420d935745c4d84ea22412ab2485e5..7ea35f9f8ecf61ab42be9947aae1176ab6e089bd:/parsing.c

diff --git a/parsing.c b/parsing.c
index 602e3de..1b2a551 100644
--- a/parsing.c
+++ b/parsing.c
@@ -56,6 +56,8 @@ char *substr(const char *head, const char *tail)
 {
 	char *buf;
 
+	if (tail < head)
+		return xstrdup("");
 	buf = xmalloc(tail - head + 1);
 	strncpy(buf, head, tail - head);
 	buf[tail - head] = '\0';