Version:           2.4.0.90 (using KDE 4.6.2) 
OS:                Linux

Any attempt to scan my collection stops at 37%.

here's a backtrace of where it seems to get stuck:


(gdb) thread apply all bt

Thread 1 (Thread 0x7febfeb5d720 (LWP 7936)):
#0  0x00007febfe2883a3 in TagLib::FLAC::File::~File() () from /usr/lib/libtag.so.1
#1  0x00007febfe288489 in TagLib::FLAC::File::~File() () from /usr/lib/libtag.so.1
#2  0x00007febfe29e8ed in TagLib::FileRef::~FileRef() () from /usr/lib/libtag.so.1
#3  0x00000000004221a8 in Meta::Tag::readTags (path="/mnt/boris/data/audio/misc/Nine Inch Nails/Nine Inch Nails - Year Zero/02 The Beginning of the End.flac") at ../../../shared/MetaTagLib.cpp:175
#4  0x00000000004184b1 in CollectionScanner::Track::Track (this=0x1273540, path="/mnt/boris/data/audio/misc/Nine Inch Nails/Nine Inch Nails - Year Zero/02 The Beginning of the End.flac", directory=<value optimized out>)
    at ../../../utilities/collectionscanner/Track.cpp:73
#5  0x0000000000411cf1 in CollectionScanner::Directory::Directory (this=0x7fff388b7bf0, path=<value optimized out>, state=0x7fff388b8340, skip=<value optimized out>) at ../../../utilities/collectionscanner/Directory.cpp:113
#6  0x000000000040ec29 in CollectionScanner::Scanner::doJob (this=0x7fff388b8300) at ../../../utilities/collectionscanner/CollectionScanner.cpp:352
#7  0x000000000040f5b0 in CollectionScanner::Scanner::qt_metacall (this=0x7fff388b8300, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=<value optimized out>) at ./CollectionScanner.moc:72
#8  0x00007febfe64b19a in QObject::event (this=0x7fff388b8300, e=<value optimized out>) at kernel/qobject.cpp:1217
#9  0x00007febfe63497c in QCoreApplication::notifyInternal (this=0x7fff388b8300, receiver=0x7fff388b8300, event=0x11b74f0) at kernel/qcoreapplication.cpp:731
#10 0x00007febfe637cc4 in sendEvent (receiver=0x0, event_type=0, data=0x1196ef0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#11 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1196ef0) at kernel/qcoreapplication.cpp:1372
#12 0x00007febfe65f173 in sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#13 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:277
#14 0x00007febfc80e4a3 in g_main_dispatch (context=0x119b080) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:2440
#15 g_main_context_dispatch (context=0x119b080) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3013
#16 0x00007febfc80ec80 in g_main_context_iterate (context=0x119b080, block=1, dispatch=1, self=<value optimized out>) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3091
#17 0x00007febfc80ef1d in g_main_context_iteration (context=0x119b080, may_block=1) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3154
#18 0x00007febfe65f5cf in QEventDispatcherGlib::processEvents (this=0x1195920, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#19 0x00007febfe633b82 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#20 0x00007febfe633d7f in QEventLoop::exec (this=0x7fff388b82b0, flags=...) at kernel/qeventloop.cpp:201
#21 0x00007febfe637f57 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#22 0x000000000040e18f in main (argc=8, argv=<value optimized out>) at ../../../utilities/collectionscanner/CollectionScanner.cpp:58

Also, somewhat related, trying to close amarok after canceling the scan, causes amarok to crash (#272477), which then causes plasma-desktop to crash (#272470)

It happens with 2.4.0.90 and the older version (2.4.0-2) in Debian Sid.

Reproducible: Always

Steps to Reproduce:
Scan my music collection.

Actual Results:  
Collection scanner hangs

Expected Results:  
Entire collection should eventually be scanned