Bug 338467

Select a vecot layer, pless Ctrl+E. Tested on Mohit's branch, so it might be a cumulative undo problem.

Thread 1 (Thread 0x7f4aadffe7a0 (LWP 6962)):
[KCrash Handler]
#6  0x00007f4aa5179d95 in raise () from /lib64/libc.so.6
#7  0x00007f4aa517b2ab in abort () from /lib64/libc.so.6
#8  0x00007f4aa61329f4 in qt_message_output (msgType=<optimized out>, buf=<optimized out>) at global/qglobal.cpp:2291
#9  0x00007f4aa6132baf in qt_message(QtMsgType, const char *, typedef __va_list_tag __va_list_tag *) (msgType=QtFatalMsg, msg=0x7f4aa6281648 "ASSERT failure in %s: \"%s\", file %s, line %d", ap=0x7fff666cb908) at global/qglobal.cpp:2337
#10 0x00007f4aa6132d54 in qFatal (msg=<optimized out>) at global/qglobal.cpp:2520
#11 0x00007f4aa6132d7e in qt_assert_x (where=<optimized out>, what=<optimized out>, file=<optimized out>, line=<optimized out>) at global/qglobal.cpp:2044
#12 0x00007f4aa8ed85ee in at (i=1, this=0xffc0c0) at /usr/include/QtCore/qlist.h:456
#13 KUndo2QStack::undoText (this=0xffc0b0) at /home/devel/kde-src/calligra-secondary/libs/kundo2/kundo2stack.cpp:976
#14 0x00007f4aa8ed874d in KUndo2QStack::setIndex (this=0xffc0b0, idx=<optimized out>, clean=false) at /home/devel/kde-src/calligra-secondary/libs/kundo2/kundo2stack.cpp:508
#15 0x00007f4aacc717c0 in KisLegacyUndoAdapter::endMacro (this=0x38fc6e0) at /home/devel/kde-src/calligra-secondary/krita/image/kis_legacy_undo_adapter.cpp:73
#16 0x00007f4aacbaf0e9 in KisImage::mergeDown (this=0x38e86e0, layer=..., strategy=0x7f4aacc71c30) at /home/devel/kde-src/calligra-secondary/krita/image/kis_image.cc:1031
#17 0x00007f4aad465b00 in KisLayerManager::mergeLayer (this=0x5f54b40) at /home/devel/kde-src/calligra-secondary/krita/ui/kis_layer_manager.cc:732
#18 0x00007f4aad468bf0 in KisLayerManager::qt_metacall (this=0x5f54b40, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fff666cc390) at /home/devel/kde-build/calligra-secondary/krita/ui/kis_layer_manager.moc:117
#19 0x00007f4aa623559a in QMetaObject::activate (sender=0x5f56100, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff666cc390) at kernel/qobject.cpp:3287
#20 0x00007f4aa6e725d2 in QAction::triggered (this=<optimized out>, _t1=false) at .moc/release-shared/moc_qaction.cpp:263
#21 0x00007f4aa6e727bf in QAction::activate (this=0x5f56100, event=<optimized out>) at kernel/qaction.cpp:1257
#22 0x00007f4aa6e7292f in QAction::event (this=<optimized out>, e=<optimized out>) at kernel/qaction.cpp:1183
#23 0x00007f4aa7aa5cda in KAction::event (this=<optimized out>, event=0x7fff666cc9c0) at /usr/src/debug/kdelibs-4.7.2/kdeui/actions/kaction.cpp:131
#24 0x00007f4aa6e78be4 in notify_helper (e=0x7fff666cc9c0, receiver=0x5f56100, this=0x705830) at kernel/qapplication.cpp:4481
#25 QApplicationPrivate::notify_helper (this=0x705830, receiver=0x5f56100, e=0x7fff666cc9c0) at kernel/qapplication.cpp:4453
#26 0x00007f4aa6e7da71 in QApplication::notify (this=0x7fff666cdcf0, receiver=0x5f56100, e=0x7fff666cc9c0) at kernel/qapplication.cpp:4360
#27 0x00007f4aac66bafe in KoApplication::notify (this=<optimized out>, receiver=0x5f56100, event=0x7fff666cc9c0) at /home/devel/kde-src/calligra-secondary/libs/main/KoApplication.cpp:621
#28 0x00007f4aa622281c in QCoreApplication::notifyInternal (this=0x7fff666cdcf0, receiver=0x5f56100, event=0x7fff666cc9c0) at kernel/qcoreapplication.cpp:787
#29 0x00007f4aa6eaabc9 in sendEvent (event=0x7fff666cc9c0, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:215
#30 QShortcutMap::dispatchEvent (this=<optimized out>, e=0x7fff666ccf70) at kernel/qshortcutmap.cpp:879
#31 0x00007f4aa6eac0bd in QShortcutMap::tryShortcutEvent (this=0x705958, o=<optimized out>, e=0x7fff666ccf70) at kernel/qshortcutmap.cpp:364
#32 0x00007f4aa6e7f6d9 in QApplication::notify (this=0x7fff666cdcf0, receiver=0x5b03640, e=0x7fff666ccf70) at kernel/qapplication.cpp:3923
#33 0x00007f4aac66bafe in KoApplication::notify (this=<optimized out>, receiver=0x5b03640, event=0x7fff666ccf70) at /home/devel/kde-src/calligra-secondary/libs/main/KoApplication.cpp:621
#34 0x00007f4aa622281c in QCoreApplication::notifyInternal (this=0x7fff666cdcf0, receiver=0x5b03640, event=0x7fff666ccf70) at kernel/qcoreapplication.cpp:787
#35 0x00007f4aa6f17f09 in QKeyMapper::sendKeyEvent (keyWidget=0x5b03640, grab=<optimized out>, type=QEvent::KeyPress, code=69, modifiers=..., text=..., autorepeat=false, count=1, nativeScanCode=26, nativeVirtualKey=101, nativeModifiers=20) at kernel/qkeymapper_x11.cpp:1866
#36 0x00007f4aa6f1837b in QKeyMapperPrivate::translateKeyEvent (this=0x747ab0, keyWidget=0x5b03640, event=0x7fff666cda60, grab=false) at kernel/qkeymapper_x11.cpp:1836
#37 0x00007f4aa6ef4564 in QApplication::x11ProcessEvent (this=0x7fff666cdcf0, event=0x7fff666cda60) at kernel/qapplication_x11.cpp:3491
#38 0x00007f4aa6f1ccba in QEventDispatcherX11::processEvents (this=0x60df00, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#39 0x00007f4aa6221a22 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#40 0x00007f4aa6221c1f in QEventLoop::exec (this=0x7fff666cdcb0, flags=...) at kernel/qeventloop.cpp:201
#41 0x00007f4aa6225de7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#42 0x00007f4aadadbb73 in kdemain (argc=<optimized out>, argv=<optimized out>) at /home/devel/kde-src/calligra-secondary/krita/main.cc:108
#43 0x00007f4aa516623d in __libc_start_main () from /lib64/libc.so.6
#44 0x0000000000400921 in _start () at ../sysdeps/x86_64/elf/start.S:113