From b7cb49c3e3cb70b7c5ae086f80fa576318fca96f Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sat, 15 Mar 2014 11:32:03 +0100
Subject: [PATCH] + issue #0001474: crash selecting constraint

---
 src/Mod/Sketcher/App/Sketch.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Mod/Sketcher/App/Sketch.cpp b/src/Mod/Sketcher/App/Sketch.cpp
index 0d1ca669a..36839636e 100644
--- a/src/Mod/Sketcher/App/Sketch.cpp
+++ b/src/Mod/Sketcher/App/Sketch.cpp
@@ -1868,6 +1868,9 @@ int Sketch::setDatum(int constrId, double value)
 
 int Sketch::getPointId(int geoId, PointPos pos) const
 {
+    // do a range check first
+    if (geoId < 0 || geoId >= Geoms.size())
+        return -1;
     switch (pos) {
     case start:
         return Geoms[geoId].startPointId;