QMimeDatabase::mimeTypeForFile freezes application when accessing symlink to named pipe

#0  0x00007f89fa70d40d in open64 () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f89f74c2b6c in open64 (__oflag=<optimized out>, __path=0x2190c18 "/home/ilia/test/test") at /usr/include/x86_64-linux-gnu/bits/fcntl2.h:91
#2  qt_safe_open (mode=438, flags=<optimized out>, pathname=0x2190c18 "/home/ilia/test/test")
    at ../../include/QtCore/5.4.2/QtCore/private/../../../../../src/corelib/kernel/qcore_unix_p.h:166
#3  QFSFileEnginePrivate::nativeOpen (this=this@entry=0x218eec0, openMode=...) at io/qfsfileengine_unix.cpp:160
#4  0x00007f89f74b02fd in QFSFileEngine::open (this=0x1d777e0, openMode=...) at io/qfsfileengine.cpp:218
#5  0x00007f89f7453217 in QFile::open (this=this@entry=0x7ffd817fa560, mode=..., mode@entry=...) at io/qfile.cpp:881
#6  0x00007f89f75b27cd in QMimeDatabase::mimeTypeForFile (this=this@entry=0x7ffd817fa710, fileInfo=..., mode=mode@entry=QMimeDatabase::MatchDefault) at mimetypes/qmimedatabase.cpp:372
#7  0x00007f89f75b2b8d in QMimeDatabase::mimeTypeForFile (this=this@entry=0x7ffd817fa710, fileName=..., mode=mode@entry=QMimeDatabase::MatchDefault) at mimetypes/qmimedatabase.cpp:413
#8  0x00007f89f75b3081 in QMimeDatabase::mimeTypeForUrl (this=0x7ffd817fa710, url=...) at mimetypes/qmimedatabase.cpp:511
#9  0x00007f89f997c268 in KFileItem::determineMimeType() const () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#10 0x00007f89f6837f20 in KFilePreviewGenerator::Private::resolveMimeType() () from /usr/lib/x86_64-linux-gnu/libKF5KIOFileWidgets.so.5
#11 0x00007f89f6837fb9 in KFilePreviewGenerator::Private::startMimeTypeResolving() () from /usr/lib/x86_64-linux-gnu/libKF5KIOFileWidgets.so.5
#12 0x00007f89f68389d8 in KFilePreviewGenerator::Private::updateIcons(KFileItemList const&) () from /usr/lib/x86_64-linux-gnu/libKF5KIOFileWidgets.so.5
#13 0x00007f89f75672fa in QMetaObject::activate (sender=0x1cf1770, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3717
#14 0x00007f89f9a03b35 in KCoreDirLister::newItems(KFileItemList const&) () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#15 0x00007f89f9a06ae5 in KCoreDirLister::Private::emitItems() () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#16 0x00007f89f9a14453 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#17 0x00007f89f9a15b70 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#18 0x00007f89f75672fa in QMetaObject::activate (sender=0x2287b80, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3717
#19 0x00007f89f99c3524 in KIO::ListJob::entries(KIO::Job*, QList<KIO::UDSEntry> const&) () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#20 0x00007f89f99c4a52 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#21 0x00007f89f99c507d in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#22 0x00007f89f75672fa in QMetaObject::activate (sender=0x1daa610, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3717
#23 0x00007f89f99abc25 in KIO::SlaveInterface::listEntries(QList<KIO::UDSEntry> const&) () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#24 0x00007f89f99aead2 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#25 0x00007f89f99ac157 in KIO::SlaveInterface::dispatch() () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#26 0x00007f89f99b0741 in KIO::Slave::gotInput() () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#27 0x00007f89f9a2c835 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#28 0x00007f89f75672fa in QMetaObject::activate (sender=0x1d90440, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3717
#29 0x00007f89f995de03 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#30 0x00007f89f75681c1 in QObject::event (this=0x1d90440, e=<optimized out>) at kernel/qobject.cpp:1245
#31 0x00007f89f8014b8c in QApplicationPrivate::notify_helper (this=this@entry=0x175c8a0, receiver=receiver@entry=0x1d90440, e=e@entry=0x218fb10) at kernel/qapplication.cpp:3720
#32 0x00007f89f801a230 in QApplication::notify (this=0x7ffd817fc5b0, receiver=0x1d90440, e=0x218fb10) at kernel/qapplication.cpp:3503
#33 0x00007f89f7536a8b in QCoreApplication::notifyInternal (this=0x7ffd817fc5b0, receiver=0x1d90440, event=event@entry=0x218fb10) at kernel/qcoreapplication.cpp:935
#34 0x00007f89f7538bc7 in QCoreApplication::sendEvent (event=0x218fb10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
---Type <return> to continue, or q <return> to quit---
#35 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1753540) at kernel/qcoreapplication.cpp:1552
#36 0x00007f89f75390f8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#37 0x00007f89f758da23 in postEventSourceDispatch (s=0x1793760) at kernel/qeventdispatcher_glib.cpp:271
#38 0x00007f89f30c7fe7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f89f30c8240 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f89f30c82ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007f89f758de2f in QEventDispatcherGlib::processEvents (this=0x179c100, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#42 0x00007f89f75342ca in QEventLoop::exec (this=this@entry=0x7ffd817fb7a0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#43 0x00007f89f8208e4d in QDialog::exec (this=0x1b28b70) at dialogs/qdialog.cpp:541
#44 0x00007f89e0fb3c1f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes/KDEPlatformTheme.so
#45 0x00007f89f8208d0a in QDialog::exec (this=this@entry=0x7ffd817fb930) at dialogs/qdialog.cpp:537
#46 0x00007f89f821a818 in QFileDialog::getOpenFileUrls (parent=0x180d480, caption=..., dir=..., filter=..., selectedFilter=0x0, options=..., supportedSchemes=...)
    at dialogs/qfiledialog.cpp:2260
#47 0x00007f89fa9ed1be in ?? () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kwrite.so
#48 0x00007f89f75672fa in QMetaObject::activate (sender=sender@entry=0x19e4520, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, 
    argv=argv@entry=0x7ffd817fbba0) at kernel/qobject.cpp:3717
#49 0x00007f89f7567af7 in QMetaObject::activate (sender=sender@entry=0x19e4520, m=m@entry=0x7f89f850bc80 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, 
    argv=argv@entry=0x7ffd817fbba0) at kernel/qobject.cpp:3582
#50 0x00007f89f800b172 in QAction::triggered (this=this@entry=0x19e4520, _t1=false) at .moc/moc_qaction.cpp:360
#51 0x00007f89f800d618 in QAction::activate (this=0x19e4520, event=<optimized out>) at kernel/qaction.cpp:1167
#52 0x00007f89f800dc2f in QAction::event (this=<optimized out>, e=<optimized out>) at kernel/qaction.cpp:1095
#53 0x00007f89f8014b8c in QApplicationPrivate::notify_helper (this=this@entry=0x175c8a0, receiver=receiver@entry=0x19e4520, e=e@entry=0x7ffd817fbe60) at kernel/qapplication.cpp:3720
#54 0x00007f89f801a230 in QApplication::notify (this=0x7ffd817fc5b0, receiver=0x19e4520, e=0x7ffd817fbe60) at kernel/qapplication.cpp:3503
#55 0x00007f89f7536a8b in QCoreApplication::notifyInternal (this=0x7ffd817fc5b0, receiver=0x19e4520, event=event@entry=0x7ffd817fbe60) at kernel/qcoreapplication.cpp:935
#56 0x00007f89f7a922a8 in QCoreApplication::sendEvent (event=0x7ffd817fbe60, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#57 QShortcutMap::dispatchEvent (this=this@entry=0x175c980, e=e@entry=0x7ffd817fc0e0) at kernel/qshortcutmap.cpp:681
#58 0x00007f89f7a923e1 in QShortcutMap::tryShortcutEvent (this=0x175c980, o=<optimized out>, e=e@entry=0x7ffd817fc0e0) at kernel/qshortcutmap.cpp:352
#59 0x00007f89f801a128 in QApplication::notify (this=0x7ffd817fc5b0, receiver=0x1969220, e=0x7ffd817fc0e0) at kernel/qapplication.cpp:3147
#60 0x00007f89f7536a8b in QCoreApplication::notifyInternal (this=0x7ffd817fc5b0, receiver=receiver@entry=0x1969220, event=event@entry=0x7ffd817fc0e0) at kernel/qcoreapplication.cpp:935
#61 0x00007f89f7a66087 in QCoreApplication::sendSpontaneousEvent (event=0x7ffd817fc0e0, receiver=0x1969220) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#62 QGuiApplicationPrivate::processKeyEvent (e=0x180bca0) at kernel/qguiapplication.cpp:1871
#63 0x00007f89f7a6b015 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x180bca0) at kernel/qguiapplication.cpp:1579
#64 0x00007f89f7a50628 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:572
#65 0x00007f89e3b24af0 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#66 0x00007f89f30c7fe7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#67 0x00007f89f30c8240 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#68 0x00007f89f30c82ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#69 0x00007f89f758de2f in QEventDispatcherGlib::processEvents (this=0x179c100, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#70 0x00007f89f75342ca in QEventLoop::exec (this=this@entry=0x7ffd817fc3b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#71 0x00007f89f753be3c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#72 0x00007f89fa9e8736 in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kwrite.so
#73 0x00007f89fa655b45 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#74 0x000000000040074e in _start ()