Crash on find

To reproduce:
1) Load creator master project
2) Open gitclient.cpp
3) Ctrl+Shift+F, type: "SLOT(show" - after a while there is a crash.

Call stack:
#0 0xb7fdd424 in __kernel_vsyscall ()
#1 0xb69011df in raise () from /lib/i386-linux-gnu/libc.so.6
#2 0xb6904825 in abort () from /lib/i386-linux-gnu/libc.so.6
#3 0xb693e39a in ?? () from /lib/i386-linux-gnu/libc.so.6
#4 0xb6948ee2 in ?? () from /lib/i386-linux-gnu/libc.so.6
#5 0xb6c55648 in QArrayData::deallocate (data=0xa1aff680, objectSize=2,
alignment=4) at tools/qarraydata.cpp:125
#6 0xb1e90326 in QTypedArrayData<unsigned short>::deallocate (data=0xa1aff680)
at /home/jkobus/dev/qt-53-stable/qtbase/include/QtCore/../../src/corelib/tools/qarraydata.h:230
#7 0xb1e8f97d in QString::~QString (this=0xa71ff190,
__in_chrg=<optimized out>)
at /home/jkobus/dev/qt-53-stable/qtbase/include/QtCore/../../src/corelib/tools/qstring.h:991
#8 0xb1ea1521 in (anonymous namespace)::runFileSearch (future=...,
searchTerm=..., files=0xb8dc6a0, flags=..., fileToContentsMap=...)
at /home/jkobus/dev/creator-31/src/libs/utils/filesearch.cpp:173
#9 0xb1ea83bf in QtConcurrent::StoredInterfaceFunctionCall4<QList<Utils::FileSearchResult>, void (QFutureInterface<QList<Utils::FileSearchResult> >&, QString, Utils::FileIterator*, QFlags<QTextDocument::FindFlag>, QMap<QString, QString>), QString, Utils::FileIterator*, QFlags<QTextDocument::FindFlag>, QMap<QString, QString> >::run (this=0xb894238)
at /home/jkobus/dev/creator-31/src/libs/utils/runextensions.h:266
#10 0xb6c4dec5 in QThreadPoolThread::run (this=0x93b41f8)
at thread/qthreadpool.cpp:101
#11 0xb6c53bc8 in QThreadPrivate::start (arg=0x93b41f8)
at thread/qthread_unix.cpp:345
#12 0xb6b87d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#13 0xb69c2bae in clone () from /lib/i386-linux-gnu/libc.so.6