Master bugs

I've tried to collect reports with the same backtraces into several master bugs.

bug #235166 QMutex::lock

#5  0x00007fa3f88108dc in QMutex::lock (this=0x9d44d0) at thread/qmutex.cpp:150
#6  0x00007fa3f6589add in ?? () from /usr/lib/libsopranoclient.so.1
#7  0x00007fa3fb29bb9d in Nepomuk::MainModel::executeQuery (this=0xbdd120,
query=..., language=Soprano::Query::QueryLanguageSparql, userQueryLanguage=...)
   at ../../../nepomuk/core/nepomukmainmodel.cpp:213
#8  0x00007fa3fafcd77c in Soprano::FilterModel::executeQuery(QString const&,
Soprano::Query::QueryLanguage, QString const&) const () from
/usr/lib/libsoprano.so.4
#9  0x00007fa3fb291fa2 in Nepomuk::ResourceData::load (this=0xc3fc70) at
../../../nepomuk/core/resourcedata.cpp:447
#10 0x00007fa3fb2921b8 in Nepomuk::ResourceData::property (this=0xc3fc70,
uri=...) at ../../../nepomuk/core/resourcedata.cpp:271
#11 0x00007fa3fb2acee2 in Nepomuk::Resource::property (this=<value optimized
out>, uri=...) at ../../../nepomuk/core/resource.cpp:280
#12 0x00007fa3fb2af9d0 in Nepomuk::Resource::rating (this=0x7fa3ebb29c80) at
../../../nepomuk/core/resource.cpp:800
#13 0x0000000000465b08 in KLoadMetaDataThread::run (this=0xc142f0) at
../../../../apps/dolphin/src/panels/information/kloadmetadatathread.cpp:95

bug #234799 Soprano::Iterator<Soprano::BindingSet>::next

#5  0x00007fc44be9af25 in ?? () from /usr/lib/libsopranoclient.so.1
#6  0x00007fc450ba4d0e in Soprano::Iterator<Soprano::BindingSet>::next
(this=0x7fc4393467b0) at /usr/include/Soprano/../soprano/iterator.h:239
#7  0x00007fc450ba19f0 in Nepomuk::ResourceData::load (this=<value optimized
out>) at ../../../nepomuk/core/resourcedata.cpp:419
#8  0x00007fc450ba21b8 in Nepomuk::ResourceData::property (this=0x18d8090,
uri=...) at ../../../nepomuk/core/resourcedata.cpp:271
#9  0x00007fc450bbcee2 in Nepomuk::Resource::property (this=<value optimized
out>, uri=...) at ../../../nepomuk/core/resource.cpp:280
#10 0x00007fc450bbf9d0 in Nepomuk::Resource::rating (this=0x7fc439346c80) at
../../../nepomuk/core/resource.cpp:800
#11 0x0000000000465b08 in KLoadMetaDataThread::run (this=0x1841550) at
../../../../apps/dolphin/src/panels/information/kloadmetadatathread.cpp:95