From f17186825609c292c275e963cefff8e953504e63 Mon Sep 17 00:00:00 2001 From: "jan.nijtmans" Date: Mon, 13 Dec 2021 11:39:15 +0000 Subject: Fix [41b1406f51]: AppendUtfToUtfRep(): undefined behavior involving pointers --- generic/tclStringObj.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c index 22e025c..e30b9af 100644 --- a/generic/tclStringObj.c +++ b/generic/tclStringObj.c @@ -1737,8 +1737,8 @@ AppendUtfToUtfRep( * the reallocs below. */ - if (bytes && bytes >= objPtr->bytes - && bytes <= objPtr->bytes + objPtr->length) { + if (bytes && objPtr->bytes && (bytes >= objPtr->bytes) + && (bytes <= objPtr->bytes + objPtr->length)) { offset = bytes - objPtr->bytes; } -- cgit v0.12