From cb42cbf6513f2f586059d4b4620d6b8c54b79b16 Mon Sep 17 00:00:00 2001
From: "jan.nijtmans" <nijtmans@users.sourceforge.net>
Date: Fri, 7 Jun 2024 11:26:32 +0000
Subject: Fix CFLAGS=-ftrapv build

---
 generic/tclUtil.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/generic/tclUtil.c b/generic/tclUtil.c
index b87b5d6..a3bfc09 100644
--- a/generic/tclUtil.c
+++ b/generic/tclUtil.c
@@ -3706,6 +3706,8 @@ GetEndOffsetFromObj(
          * as endValue will have to adjust accordingly.
 	 */
 	*widePtr = (endValue == -1) ? WIDE_MAX : endValue + 1;
+    } else if (offset == WIDE_MIN) {
+	*widePtr = (endValue == -1) ? WIDE_MIN : -1;
     } else if (offset < 0) {
 	/* end-(n-1) - Different signs, sum cannot overflow */
 	*widePtr = endValue + offset + 1;
-- 
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