I think I was printing or using custom export.  It was right before
class, and I just launched another lyx to print.

Program received signal SIGSEGV, Segmentation fault.
MathCursor::depth (this=0x0) at /usr/include/g++/stl_vector.h:210
210         { return size_type(end() - begin()); }
(gdb) bt
#0  MathCursor::depth (this=0x0) at /usr/include/g++/stl_vector.h:210
#1  0x822a387 in MathCursor::cursor (this=0x0) at math_cursor.C:945
#2  0x82295b9 in MathCursor::par (this=0x0) at math_cursor.C:670
#3  0x8229527 in MathCursor::getPos (this=0x0, x=@0xbfbfe528,
y=@0xbfbfe52c)
    at math_cursor.C:654
#4  0x821a62f in InsetFormulaBase::showInsetCursor (this=0x869bd00, 
    bv=0x8602fe0) at formulabase.C:242
#5  0x821a5e7 in InsetFormulaBase::toggleInsetCursor (this=0x869bd00, 
    bv=0x8602fe0) at formulabase.C:232
#6  0x805e98c in BufferView::Pimpl::cursorToggle (this=0x860e480)
    at BufferView_pimpl.C:606
#7  0x806bbb1 in
boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void,
boost::_mfi::mf0<void, BufferView::Pimpl>,
boost::_bi::list1<boost::_bi::value<BufferView::Pimpl *> > >,
void>::invoke (function_obj_ptr={
      obj_ptr = 0x8609dc0, const_obj_ptr = 0x8609dc0, func_ptr =
0x8609dc0})
    at ../boost/boost/bind.hpp:135
#8  0x80576f6 in boost::signal0<void, boost::last_value<void>, int,
less<int>, boost::function0<void, boost::empty_function_policy,
boost::empty_function_mixin, allocator<boost::function_base> >
>::operator() (this=0x860e49c)
    at ../../boost/boost/function/function_base.hpp:328
#9  0x8318976 in Timeout::emit (this=0x860e49c) at Timeout.C:62
#10 0x83d5c95 in C_intern_timeout_cb (data=0x860e49c) at
Timeout_pimpl.C:33
#11 0x285b21bf in fl_handle_timeouts (msec=10) at timeout.c:134
---Type <return> to continue, or q <return> to quit---
#12 0x28591a63 in get_next_event (wait_io=0, form=0xbfbfedc8,
xev=0x285d6280)
    at forms.c:2484
#13 0x285906d2 in do_interaction_step (wait_io=0) at forms.c:1765
#14 0x285910d9 in fl_treat_interaction_events (wait=0) at forms.c:2097
#15 0x28591121 in fl_check_forms () at forms.c:2111
#16 0x83f57d1 in lyx_gui::start (batch=@0xbfbff57c, files=0xbfbff3e4)
    at lyx_gui.C:312
#17 0x814700a in LyX::LyX (this=0xbfbff578, argc=@0xbfbff5a8,
argv=0xbfbff5f4)
    at ../src/lyx_main.C:159
#18 0x81a6cde in main (argc=1, argv=0xbfbff5f4) at ../src/main.C:31
#19 0x8050685 in _start ()
(gdb) 

-- 
Richard E. Hawkins, Asst. Prof. of Economics    /"\   ASCII ribbon campaign
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