I was playing a song when the crash occurred and happened to be recording events. I was using the fixorderlist branch, but I doubt that is relevant, as it does not contain modifications to the C code in trunk.
Some events immediately before crash...
[u'Arow', [0, 739382861]]
[u'qlocation', None]
[u'Atrack', 0]
[u'Asystem', 1]
[u'Apattern', 2]
[u'Arow', [0, 773885168]]
[u'qlocation', None]
[u'Atrack', 0]
[u'Asystem', 1]
[u'Apattern', 2]
[u'Arow', [0, 808387475]]
[u'qlocation', None]
[u'Atrack', 0]
[u'Asystem', 1]
[u'Apattern', 2]
[u'Arow', [0, 842889782]]
The crash...
libkunquat: src/lib/events/Event_global_jump.c:111: Trigger_global_jump_process: Assertion `jc != NULL' failed.
Backtrace:
/home/twruottu/kunquat/lib/libkunquat.so(Trigger_global_jump_process+0x161) [0x7fc83ad2caf1]
/home/twruottu/kunquat/lib/libkunquat.so(Pattern_mix+0x895) [0x7fc83acfb4b5]
/home/twruottu/kunquat/lib/libkunquat.so(Song_mix+0x3f3) [0x7fc83ad11f13]
/home/twruottu/kunquat/lib/libkunquat.so(kqt_Handle_mix+0x60) [0x7fc83acf7e70]
/usr/lib/python2.7/lib-dynload/_ctypes.so(ffi_call_unix64+0x4c) [0x7fc83b187ea4]
/usr/lib/python2.7/lib-dynload/_ctypes.so(ffi_call+0x1e5) [0x7fc83b1878c5]
/usr/lib/python2.7/lib-dynload/_ctypes.so(_ctypes_callproc+0x4d2) [0x7fc83b1782c2]
/usr/lib/python2.7/lib-dynload/_ctypes.so(+0xbaa2) [0x7fc83b178aa2]
python(PyObject_Call+0x36) [0x4e9f36]
python(PyEval_EvalFrameEx+0x86a) [0x49846a]
python(PyEval_EvalCodeEx+0x1a0) [0x49f1c0]
python(PyEval_EvalFrameEx+0x7b8) [0x4983b8]
python(PyEval_EvalCodeEx+0x1a0) [0x49f1c0]
python() [0x4a8960]
python(PyObject_Call+0x36) [0x4e9f36]
python() [0x4ec11a]
python(PyObject_Call+0x36) [0x4e9f36]
python(PyEval_CallObjectWithKeywords+0x36) [0x4ea396]
/usr/lib/python2.7/dist-packages/sip.so(sip_api_invoke_slot+0x1a0) [0x7fc835c42f80]
/usr/lib/python2.7/dist-packages/PyQt4/QtCore.so(+0x17d396) [0x7fc835968396]
/usr/lib/python2.7/dist-packages/PyQt4/QtCore.so(+0x17d690) [0x7fc835968690]
/usr/lib/python2.7/dist-packages/PyQt4/QtCore.so(+0x17d772) [0x7fc835968772]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(_ZN11QMetaObject8activateEP7QObjectPKS_iPPv+0x4b9) [0x7fc8391bb489]
/usr/lib/python2.7/dist-packages/PyQt4/QtCore.so(+0xc6f5f) [0x7fc8358b1f5f]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(_ZN7QObject5eventEP6QEvent+0x99) [0x7fc8391c0179]
/usr/lib/python2.7/dist-packages/PyQt4/QtCore.so(+0xc7e5d) [0x7fc8358b2e5d]
/usr/lib/x86_64-linux-gnu/libQtGui.so.4(_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent+0xb4) [0x7fc8396c9894]
/usr/lib/x86_64-linux-gnu/libQtGui.so.4(_ZN12QApplication6notifyEP7QObjectP6QEvent+0x113) [0x7fc8396ce713]
/usr/lib/python2.7/dist-packages/PyQt4/QtGui.so(+0x4b3a99) [0x7fc83a67fa99]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(_ZN16QCoreApplication14notifyInternalEP7QObjectP6QEvent+0x8c) [0x7fc8391a6e9c]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(+0x1ac1f2) [0x7fc8391d81f2]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(+0x1a9c0d) [0x7fc8391d5c0d]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(+0x1a9c31) [0x7fc8391d5c31]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_context_dispatch+0x133) [0x7fc838630d53]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(+0x480a0) [0x7fc8386310a0]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_context_iteration+0x34) [0x7fc838631164]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0x6f) [0x7fc8391d63bf]
/usr/lib/x86_64-linux-gnu/libQtGui.so.4(+0x273d5e) [0x7fc839771d5e]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(_ZN10QEventLoop13processEventsE6QFlagsINS_17ProcessEventsFlagEE+0x32) [0x7fc8391a5c82]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE+0xf7) [0x7fc8391a5ed7]
/usr/lib/x86_64-linux-gnu/libQtCore.so.4(_ZN16QCoreApplication4execEv+0x87) [0x7fc8391aaf67]
/usr/lib/python2.7/dist-packages/PyQt4/QtGui.so(+0x47fc5e) [0x7fc83a64bc5e]
python(PyEval_EvalFrameEx+0x2a4) [0x497ea4]
python(PyEval_EvalCodeEx+0x1a0) [0x49f1c0]
python(PyEval_EvalFrameEx+0x7b8) [0x4983b8]
python(PyEval_EvalCodeEx+0x1a0) [0x49f1c0]
python(PyRun_FileExFlags+0xe1) [0x4a9081]
python(PyRun_SimpleFileExFlags+0x1d1) [0x4a9311]
python(Py_Main+0x55d) [0x4aa8bd]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7fc83c83c76d]
python() [0x41b9b1]
Aborted (core dumped)