noam@nikanor:~/work/doubleclick$ gdb /opt/qt59/bin/qmlscene /tmp/crash/CoreDump GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1 Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /opt/qt59/bin/qmlscene...(no debugging symbols found)...done. [New LWP 12931] [New LWP 12933] [New LWP 12934] [New LWP 12932] [New LWP 12936] [New LWP 12935] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `/opt/qt59/bin/qmlscene main.qml'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007fcc3582b935 in QtSharedPointer::ExternalRefCountData::getAndRef(QObject const*) () from /opt/qt59/bin/../lib/libQt5Core.so.5 [Current thread is 1 (Thread 0x7fcc370a6740 (LWP 12931))] (gdb) where #0 0x00007fcc3582b935 in QtSharedPointer::ExternalRefCountData::getAndRef(QObject const*) () from /opt/qt59/bin/../lib/libQt5Core.so.5 #1 0x00007fcc36a17998 in QV4::QObjectWrapper::create(QV4::ExecutionEngine*, QObject*) () from /opt/qt59/bin/../lib/libQt5Qml.so.5 #2 0x00007fcc36a1962c in QV4::QObjectWrapper::wrap_slowPath(QV4::ExecutionEngine*, QObject*) () from /opt/qt59/bin/../lib/libQt5Qml.so.5 #3 0x00007fcc36a1cd36 in ?? () from /opt/qt59/bin/../lib/libQt5Qml.so.5 #4 0x00007fcc36a30eda in QV4::Runtime::method_getQmlQObjectProperty(QV4::ExecutionEngine*, QV4::Value const&, int, bool) () from /opt/qt59/bin/../lib/libQt5Qml.so.5 #5 0x00007fcc3709ab5a in ?? () #6 0x0000000000000000 in ?? () (gdb) quit