Don't let it read off the front of empty relative URLs.

1 files changed, 2 insertions, 2 deletions

diff --git a/utils/nsurl.c b/utils/nsurl.c
index 1107d67f9..80c364654 100644
--- a/utils/nsurl.c
+++ b/utils/nsurl.c
@@ -454,9 +454,9 @@ static void nsurl__get_string_markers(const char * const url_s,
 	/* We got to the end of url_s.
 	 * Need to skip back over trailing whitespace to find end of URL */
 	pos--;
-	if (isspace(*pos)) {
+	if (pos >= url_s && isspace(*pos)) {
 		trailing_whitespace = true;
-		while (isspace(*pos))
+		while (pos >= url_s && isspace(*pos))
 			pos--;
 	}