0       __kernel_vsyscall                       0xb7fdd424
1       __lll_lock_wait lowlevellock.S  142     0xb53ad5a2
2       _L_lock_686     /lib/i386-linux-gnu/libpthread.so.0             0xb53a8ead
3       __pthread_mutex_lock    pthread_mutex_lock.c    61      0xb53a8cf3
4       lucene::util::mutex_thread::lock        threads.cpp     222     0xb7bb9c91
5       lucene::util::mutexGuard::mutexGuard    threads.cpp     283     0xb7bb9e63
6       lucene::index::DocumentsWriter::finishDocument  DocumentsWriter.cpp     1079    0xb7d81cec
7       lucene::index::DocumentsWriter::updateDocument  DocumentsWriter.cpp     947     0xb7d81344
8       lucene::index::DocumentsWriter::addDocument     DocumentsWriter.cpp     930     0xb7d812c1
9       lucene::index::IndexWriter::addDocument IndexWriter.cpp 682     0xb7dc375e
10      BookIndexerBase::addPageToIndex bookindexerbase.cpp     50      0x813ac65
11      BookIndexerSimple::start        bookindexersimple.cpp   95      0x813b8cf
12      BookIndexerThread::indexBook    bookindexer.cpp 107     0x80f6a38
13      BookIndexerThread::startIndexing        bookindexer.cpp 61      0x80f65e8
14      BookIndexerThread::run  bookindexer.cpp 45      0x80f646b
15      ??      /usr/local/Trolltech/Qt-4.8.4/lib/libQtCore.so.4                0xb542b588
16      start_thread    pthread_create.c        308     0xb53a6d4c
17      clone   clone.S 130     0xb51b4d3e