Sketcher: fix access to isPerformingTransaction on null pointer

=============================================================== Fixes this crash: https://forum.freecadweb.org/viewtopic.php?f=3&t=48414#p414255
2020-07-07 18:09:55 +02:00
parent c3da895a1f
commit 39b81e40a9
1 changed files with 3 additions and 1 deletions
--- a/src/Mod/Sketcher/App/SketchObject.cpp
+++ b/src/Mod/Sketcher/App/SketchObject.cpp
@@ -7040,7 +7040,9 @@ void SketchObject::onChanged(const App::Property* prop)

    if (prop == &Geometry || prop == &Constraints) {

-        if(getDocument()->isPerformingTransaction()) { // undo/redo
+        auto doc = getDocument();
+
+        if(doc && doc->isPerformingTransaction()) { // undo/redo
            setStatus(App::PendingTransactionUpdate, true);
        }
        else {