[CLAM] NetworkEditor Crash BUG

[Johan Ekenberg]

The sequel to my previous bug report:

- Open example data SMSTransposition
- Disconnect Input -> SMSAnalysisCore
- Now try to open an entry from File->Open Recent. When it asks to save changes, press Discard.
For me, this crashes with:

pure virtual method called
terminate called without an active exception
Aborted

Here's the backtrace from gdb:
(gdb) bt
#0  0xb7f60410 in ?? ()
#1  0xbfbd12fc in ?? ()
#2  0x00000006 in ?? ()
#3  0xb6c67c51 in abort () from /lib/libc.so.6
#4  0xb6e3d460 in __gnu_cxx::__verbose_terminate_handler () from /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6
#5  0xb6e3b185 in ?? () from /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6
#6  0xb6e3b1b6 in std::terminate () from /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6
#7  0xb6e3b7f5 in __cxa_pure_virtual () from /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6
#8  0xb7eeeec6 in CLAM::InPortBase::Disconnect () from /usr/local/lib/libclam_core.so.0
#9  0xb7b63e83 in CLAM::SMSAnalysisCore::~SMSAnalysisCore () from /usr/local/lib/libclam_processing.so.0
#10 0xb7ef2af5 in CLAM::Network::RemoveProcessing () from /usr/local/lib/libclam_core.so.0
#11 0xb7ef2ca2 in CLAM::Network::Clear () from /usr/local/lib/libclam_core.so.0
#12 0x0811feb2 in MainWindow::clear (this=0xbfbd2704, isDummy=false) at src/generated/../MainWindow.hxx:214
#13 0x081201df in MainWindow::load (this=0xbfbd2704, filename=@0xbfbd16d0) at src/generated/../MainWindow.hxx:180
#14 0x0812b31a in MainWindow::qt_metacall (this=0xbfbd2704, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0xbfbd1c4c) at src/generated/../MainWindow.hxx:292
#15 0xb6fbddaa in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#16 0xb6fbe02d in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#17 0xb7345533 in QAction::triggered () from /usr/lib/qt4/libQtGui.so.4
#18 0xb7346168 in QAction::activate () from /usr/lib/qt4/libQtGui.so.4
#19 0xb7618668 in ?? () from /usr/lib/qt4/libQtGui.so.4
#20 0xb761ac88 in QMenu::mouseReleaseEvent () from /usr/lib/qt4/libQtGui.so.4
#21 0xb738a091 in QWidget::event () from /usr/lib/qt4/libQtGui.so.4
#22 0xb7615a39 in QMenu::event () from /usr/lib/qt4/libQtGui.so.4
#23 0xb734ab25 in QApplicationPrivate::notify_helper () from /usr/lib/qt4/libQtGui.so.4
#24 0xb734d303 in QApplication::notify () from /usr/lib/qt4/libQtGui.so.4
#25 0xb739c212 in ?? () from /usr/lib/qt4/libQtGui.so.4
#26 0xb739a509 in QApplication::x11ProcessEvent () from /usr/lib/qt4/libQtGui.so.4
#27 0xb73bbf3c in ?? () from /usr/lib/qt4/libQtGui.so.4
#28 0xb6fabe9b in QEventLoop::processEvents () from /usr/lib/qt4/libQtCore.so.4
#29 0xb6fabf7f in QEventLoop::exec () from /usr/lib/qt4/libQtCore.so.4
#30 0xb6fad8db in QCoreApplication::exec () from /usr/lib/qt4/libQtCore.so.4
#31 0xb734a20f in QApplication::exec () from /usr/lib/qt4/libQtGui.so.4
#32 0x08117d81 in main (argc=Cannot access memory at address 0x0
) at src/main.cxx:71