#0 0x414f03d2 in QIODevice::isOpen() const () from /usr/lib/libQtCore.so.4 #1 0x00071908 in BinTreeNodeReader::getOneToplevelStream (this=0x8400e8) at Whatsapp/bintreenodereader.cpp:58 #2 0x000719cc in BinTreeNodeReader::nextTree (this=0x8400e8, node=...) at Whatsapp/bintreenodereader.cpp:142 #3 0x0004ec50 in Connection::read (this=0xea4060) at Whatsapp/connection.cpp:142 #4 0x00076e54 in Client::read (this=0x3f82e0) at client.cpp:1132 #5 0x0013d760 in Client::qt_metacall (this=0x3f82e0, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0xbe880f80) at moc_client.cpp:193