From c4317f88f8c9171b7715c3688d8f42141ef7f9af Mon Sep 17 00:00:00 2001
From: "chris jones @ipatch" <chris.r.jones.1983@gmail.com>
Date: Wed, 4 Feb 2026 13:26:16 -0600
Subject: [PATCH] sketcher: fixes #27281 fix access out of bounds crash with
 "remove axes alignment"

---
 src/Mod/Sketcher/App/SketchObject.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/Mod/Sketcher/App/SketchObject.cpp b/src/Mod/Sketcher/App/SketchObject.cpp
index d1ee015004..816e9e0400 100644
--- a/src/Mod/Sketcher/App/SketchObject.cpp
+++ b/src/Mod/Sketcher/App/SketchObject.cpp
@@ -24,6 +24,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <cstddef>
 #include <limits>
 #include <vector>
 
@@ -5666,9 +5667,10 @@ int SketchObject::removeAxesAlignment(const std::vector<int>& geoIdList)
         {{Sketcher::Horizontal, GeoEnum::GeoUndef},
          {Sketcher::Vertical, GeoEnum::GeoUndef}};
 
-    int cindex = 0;
+    size_t cindex = 0;
     for (size_t i = 0; i < constrvals.size(); i++) {
-        if (i != changeConstraintIndices[cindex].first) {
+        if (cindex >= changeConstraintIndices.size()
+        || i != changeConstraintIndices[cindex].first) {
             newconstrVals.push_back(constrvals[i]);
             continue;
         }