A new page was just coming in -- seems like the same sort of problem as last time. (gdb) bt #0 0xb77bb424 in __kernel_vsyscall () #1 0xb72f9661 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64 #2 0xb72fca92 in *__GI_abort () at abort.c:92 #3 0xb72f2878 in *__GI___assert_fail ( assertion=0x8151afe "i >= 0 && this->num - i > 0", file=0x8151aee "../lout/misc.hh", line=167, function=0x8151ba0 "T* lout::misc::SimpleVector<T>::getRef(int) const [with T = dw::Textblock::Line]") at assert.c:81 #4 0x080a9040 in lout::misc::SimpleVector<dw::Textblock::Line>::getRef ( this=0x953b618, i=-1) at ../lout/misc.hh:167 #5 0x080a2786 in dw::Textblock::sendSelectionEvent (this=0x916c610, eventType=dw::core::SelectionState::BUTTON_RELEASE, event=0xbfbb8180) at textblock.cc:1093 #6 0x080a24c3 in dw::Textblock::buttonReleaseImpl (this=0x916c610, event=0xbfbb8180) at textblock.cc:1008 #7 0x080d8910 in dw::core::Widget::buttonRelease (this=0x916c610, event=0xbfbb8180) at widget.cc:1027 #8 0x080cd617 in dw::core::Layout::processMouseEvent (this=0x90fc058, event=0xbfbb8180, type=dw::core::Layout::BUTTON_RELEASE) at layout.cc:1234 #9 0x080cd00e in dw::core::Layout::buttonEvent (this=0x90fc058, type=dw::core::Layout::BUTTON_RELEASE, view=0x90f9f60, numPressed=1, x=127, y=180, state=0, button=1) at layout.cc:1023 #10 0x080c46ae in dw::core::Layout::buttonRelease (this=0x90fc058, view=0x90f9f60, numPressed=1, x=127, y=180, state=0, button=1) at layout.hh:345 #11 0x080c33f7 in dw::fltk::FltkViewBase::handle (this=0x90f9f60, event=2) at fltkviewbase.cc:319 #12 0x080c5e8a in dw::fltk::FltkViewport::handle (this=0x90f9f60, event=2) at fltkviewport.cc:331 #13 0x080ded22 in send(int, Fl_Widget*, Fl_Window*) () #14 0x080dfbaf in Fl::handle_(int, Fl_Window*) () #15 0x080dff0e in Fl::handle(int, Fl_Window*) () #16 0x08107e9d in fl_handle(_XEvent const&) () #17 0x08107fbc in do_queued_events() () #18 0x0810822a in fl_wait(double) () #19 0x080e08af in Fl::wait(double) () #20 0x080e099d in Fl::run() () #21 0x08052f7a in main (argc=1, argv=0xbfbb8854) at dillo.cc:588