adenilson@asusbloat:~/Desktop/digia/qjsonbug$ gdb qjsonbug core
GNU gdb (GDB) 7.5-ubuntu
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/adenilson/Desktop/digia/qjsonbug/qjsonbug...(no debugging symbols found)...done.
[New LWP 7933]

warning: Can't read pathname for load map: Input/output error.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `./qjsonbug'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007f7a25e685d6 in objectContentToJson(QJsonPrivate::Object const*, QByteArray&, int, bool) ()
   from /home/adenilson/apps/qt5/qtbase/lib/libQt5Core.so.5
(gdb) bt
#0  0x00007f7a25e685d6 in objectContentToJson(QJsonPrivate::Object const*, QByteArray&, int, bool) ()
   from /home/adenilson/apps/qt5/qtbase/lib/libQt5Core.so.5
#1  0x00007f7a25e6808a in valueToJson(QJsonPrivate::Base const*, QJsonPrivate::Value const&, QByteArray&, int, bool)
    () from /home/adenilson/apps/qt5/qtbase/lib/libQt5Core.so.5
#2  0x00007f7a25e687a9 in arrayContentToJson(QJsonPrivate::Array const*, QByteArray&, int, bool) ()
   from /home/adenilson/apps/qt5/qtbase/lib/libQt5Core.so.5
#3  0x00007f7a25e68a4a in QJsonPrivate::Writer::arrayToJson(QJsonPrivate::Array const*, QByteArray&, int, bool) ()
   from /home/adenilson/apps/qt5/qtbase/lib/libQt5Core.so.5
#4  0x00007f7a25e62850 in QJsonDocument::toJson() const () from /home/adenilson/apps/qt5/qtbase/lib/libQt5Core.so.5
#5  0x00000000004015e7 in generate() ()
#6  0x00000000004010cb in main ()