File browser crashes when selecting a "qt file type" in the Qt Creator open dialog. Doesn't happen with Qt 4.8.3.

How to reproduce:
1) create a dummy project, e.g. File > New > Applications > Qt Gui Application
2) close the project again
3) File > Open File or Project
4) navigate to the dummy project and select one of the Qt file types (pro, ui, ...) by single clicking on it
5) after a short moment --> crash

The crash doesn't happen when directly double-clicking the .pro file.

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libobjc.A.dylib 0x00007fff84feb250 objc_msgSend + 16
1 com.apple.AppKit 0x00007fff8cefe9de -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] + 3540
2 com.apple.AppKit 0x00007fff8cec8d73 -[NSView displayIfNeeded] + 1830
3 com.apple.AppKit 0x00007fff8cec82ac _handleWindowNeedsDisplayOrLayoutOrUpdateConstraints + 738
4 com.apple.AppKit 0x00007fff8d493971 __83-[NSWindow _postWindowNeedsDisplayOrLayoutOrUpdateConstraintsUnlessPostingDisabled]_block_invoke_01208 + 46
5 com.apple.CoreFoundation 0x00007fff8a1fb9b7 _CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION_ + 23
6 com.apple.CoreFoundation 0x00007fff8a1fb921 __CFRunLoopDoObservers + 369
7 com.apple.CoreFoundation 0x00007fff8a1d6d88 __CFRunLoopRun + 728
8 com.apple.CoreFoundation 0x00007fff8a1d66b2 CFRunLoopRunSpecific + 290
9 com.apple.HIToolbox 0x00007fff83f3e0a4 RunCurrentEventLoopInMode + 209
10 com.apple.HIToolbox 0x00007fff83f3de42 ReceiveNextEventCommon + 356
11 com.apple.HIToolbox 0x00007fff83f3dcd3 BlockUntilNextEventMatchingListInMode + 62
12 com.apple.AppKit 0x00007fff8cec5613 _DPSNextEvent + 685
13 com.apple.AppKit 0x00007fff8cec4ed2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
14 com.apple.AppKit 0x00007fff8d10f709 -[NSApplication _realDoModalLoop:peek:] + 485
15 com.apple.AppKit 0x00007fff8d10f9ce -[NSApplication runModalForWindow:] + 120
16 com.apple.AppKit 0x00007fff8d35adb6 -[NSSavePanel runModal] + 302
17 libqcocoa.dylib 0x0000000102f249b7 -[QNSOpenSavePanelDelegate runApplicationModalPanel] + 279
18 libqcocoa.dylib 0x0000000102f2754a QCocoaFileDialogHelper::exec() + 26
19 QtWidgets 0x00000001002d22b5 QDialog::exec() + 261
20 QtWidgets 0x00000001002dd1c6 QFileDialog::getOpenFileNames(QWidget*, QString const&, QString const&, QString const&, QString*, QFlags<QFileDialog::Option>) + 358
21 libCore_debug.dylib 0x0000000108166776 Core::DocumentManager::getOpenFileNames(QString const&, QString, QString*) + 614 (documentmanager.cpp:805)
22 libCore_debug.dylib 0x0000000108052116 Core::EditorManager::getOpenFileNames() const + 118 (editormanager.cpp:1354)
23 libCore_debug.dylib 0x00000001080142d5 Core::Internal::MainWindow::openFile() + 37 (mainwindow.cpp:815)
24 libCore_debug.dylib 0x000000010817512f Core::Internal::MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 2399 (moc_mainwindow.cpp:201)
25 QtCore 0x0000000100cce380 QMetaObject::activate(QObject*, int, int, void**) + 2656
26 QtWidgets 0x00000001000edd49 QAction::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 153
27 QtCore 0x0000000100cce380 QMetaObject::activate(QObject*, int, int, void**) + 2656
28 QtWidgets 0x00000001000ed998 QAction::activate(QAction::ActionEvent) + 264
29 QtWidgets 0x00000001000edd98 QAction::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 232
30 QtCore 0x0000000100cce380 QMetaObject::activate(QObject*, int, int, void**) + 2656
31 com.apple.AppKit 0x00007fff8cfb5a59 -[NSApplication sendAction:to:from:] + 342
32 com.apple.AppKit 0x00007fff8d0eb44c -[NSMenuItem _corePerformAction] + 406
33 com.apple.AppKit 0x00007fff8d0eb13a -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] + 133
34 com.apple.AppKit 0x00007fff8d0e9dc0 -[NSMenu performKeyEquivalent:] + 271
35 com.apple.AppKit 0x00007fff8d0e9283 -[NSApplication _handleKeyEquivalent:] + 829
36 com.apple.AppKit 0x00007fff8cfa6243 -[NSApplication sendEvent:] + 4480
37 com.apple.AppKit 0x00007fff8cebc2fa -[NSApplication run] + 636
38 libqcocoa.dylib 0x0000000102f10d3b QCocoaEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 1259
39 QtCore 0x0000000100c9dd53 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 355
40 QtCore 0x0000000100ca0985 QCoreApplication::exec() + 357
41 com.nokia.qtcreator 0x000000010000c4ec main + 12700 (main.cpp:435)
42 com.nokia.qtcreator 0x0000000100005894 start + 52