(gdb) bt #0 0x00007fff90599ce2 in __pthread_kill () #1 0x00007fff933467d2 in pthread_kill () #2 0x00007fff93337a7a in abort () #3 0x00007fff9339684c in free () #4 0x00007fff8eb28702 in std::string::_Rep::_M_dispose () #5 0x00007fff8eb292ba in std::string::assign () #6 0x0000000105363f5d in PropSetSimple::Set () #7 0x000000010539f1a3 in ScintillaBase::WndProc () #8 0x0000000105298741 in QsciScintilla::setLexer () #9 0x000000010301b0c8 in file_editor_tab::update_lexer (this=0x1143e6d10) at ../../octave/libgui/src/m-editor/file-editor-tab.cc:328 #10 0x000000010301f095 in file_editor_tab::notice_settings (this=0x1143e6d10, settings=0x109e68580) at ../../octave/libgui/src/m-editor/file-editor-tab.cc:1230 #11 0x0000000103019d48 in file_editor_tab::file_editor_tab (this=0x1143e6d10, address@hidden) at ../../octave/libgui/src/m-editor/file-editor-tab.cc:139 #12 0x0000000103022e95 in file_editor::request_new_file (this=0x10b0b2530, address@hidden) at ../../octave/libgui/src/m-editor/file-editor.cc:135 #13 0x000000010307d898 in file_editor_interface::qt_metacall (this=0x10b0b2530, _c=InvokeMetaMethod, _id=0, _a=0x7fff5fbfbf68) at src/m-editor/moc-file-editor-interface.cc:99 #14 0x000000010307ece8 in file_editor::qt_metacall (this=0x10b0b2530, _c=InvokeMetaMethod, _id=45, _a=0x7fff5fbfbf68) at src/m-editor/moc-file-editor.cc:262 #15 0x00000001020e41b2 in QMetaObject::activate () #16 0x0000000102322e12 in QAction::activate () #17 0x0000000102653aab in QAbstractButtonPrivate::click () #18 0x0000000102653cc6 in QAbstractButton::mouseReleaseEvent () #19 0x00000001027114fe in QToolButton::mouseReleaseEvent () #20 0x000000010237636b in QWidget::event () #21 0x0000000102652d56 in QAbstractButton::event () #22 0x000000010271111e in QToolButton::event () #23 0x0000000102326b38 in QApplicationPrivate::notify_helper () #24 0x00000001023275c8 in QApplication::notify () #25 0x00000001020d0272 in QCoreApplication::notifyInternal () #26 0x00000001023262ca in qt_sendSpontaneousEvent () #27 0x00000001022e0a5a in qt_mac_handleMouseEvent () #28 0x00000001022d43d6 in -[QCocoaView mouseUp:] () #29 0x00007fff8b46ad5e in -[NSWindow sendEvent:] () #30 0x00000001022d8ee5 in -[QCocoaWindow sendEvent:] () #31 0x00007fff8b4043a5 in -[NSApplication sendEvent:] () #32 0x00000001022dc36b in -[QNSApplication sendEvent:] () #33 0x00007fff8b39aa0e in -[NSApplication run] () #34 0x00000001022e45cb in QEventDispatcherMac::processEvents () #35 0x00000001020cd885 in QEventLoop::exec () #36 0x00000001020d08c7 in QCoreApplication::exec () #37 0x000000010304389a in octave_start_gui (argc=8, argv=0x7fff5fbfd190, fork=) at ../../octave/libgui/src/octave-gui.cc:178 #38 0x0000000100002a48 in main (argc=8, argv=0x7fff5fbfd190) at ../../octave/src/main.cc:44