diff -up vim80/src/search.c.cve1629 vim80/src/search.c
--- vim80/src/search.c.cve1629	2022-05-24 13:55:06.789859865 +0200
+++ vim80/src/search.c	2022-05-24 13:56:31.889218958 +0200
@@ -4349,7 +4349,11 @@ find_next_quote(
 	if (c == NUL)
 	    return -1;
 	else if (escape != NULL && vim_strchr(escape, c))
+	{
 	    ++col;
+	    if (line[col] == NUL)
+		return -1;
+	}
 	else if (c == quotechar)
 	    break;
 #ifdef FEAT_MBYTE