Throwing segmentation fault
-------------------------------------------------
Error message:
  segmentation fault

System information:
  TeXmacs version  : 1.99.5
  Built by         : builduser
  Building date    : Nov 19 2016
  Operating system : linux-gnu
  Vendor           : pc
  Processor        : x86_64
  Crash date       : Sun Apr 16 13:14:01 BST 2017

Editor status:
  Root path          : [ 1 ]
  Current path       : [ 1, 0, 0 ]
  Shifted path       : [ 1, 0, 0 ]
  Physical selection : [ 1, 0, 0 ] -- [ 1, 0, 0 ]

Backtrace of C++ stack:
  texmacs.bin() [0xdb3f9f]
  texmacs.bin() [0x49217c]
  /usr/lib/libc.so.6 : () + 0x33a90
  texmacs.bin() [0xa65372]
  texmacs.bin() [0xa78569]
  texmacs.bin() [0xa3851f]
  texmacs.bin() [0xa8d525]
  /usr/lib/libQtCore.so.4 : QMetaObject::activate(QObject*, QMetaObject const*, int, void**) + 0x4d0
  /usr/lib/libQtCore.so.4 : QObject::event(QEvent*) + 0xa3
  /usr/lib/libQtGui.so.4 : QApplicationPrivate::notify_helper(QObject*, QEvent*) + 0x8c
  /usr/lib/libQtGui.so.4 : QApplication::notify(QObject*, QEvent*) + 0x2cc
  texmacs.bin() [0xa8dbeb]
  /usr/lib/libQtCore.so.4 : QCoreApplication::notifyInternal(QObject*, QEvent*) + 0x8d
  /usr/lib/libQtCore.so.4 : () + 0x1cf410
  /usr/lib/libQtCore.so.4 : () + 0x1cc591
  /usr/lib/libglib-2.0.so.0 : g_main_context_dispatch() + 0x2a7
  /usr/lib/libglib-2.0.so.0 : () + 0x4a810
  /usr/lib/libglib-2.0.so.0 : g_main_context_iteration() + 0x2c
  /usr/lib/libQtCore.so.4 : QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 0x7e
  /usr/lib/libQtGui.so.4 : () + 0x2aaed6
  /usr/lib/libQtCore.so.4 : QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 0x3f
  /usr/lib/libQtCore.so.4 : QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 0x1b5
  /usr/lib/libQtCore.so.4 : QCoreApplication::exec() + 0x99
  texmacs.bin() [0xda78e1]
  /usr/lib/libguile.so.17 : () + 0x62e2f
  /usr/lib/libguile.so.17 : () + 0x3a44a
  /usr/lib/libguile.so.17 : scm_c_catch() + 0x258
  /usr/lib/libguile.so.17 : scm_i_with_continuation_barrier() + 0xb4
  /usr/lib/libguile.so.17 : scm_c_with_continuation_barrier() + 0x40
  /usr/lib/libguile.so.17 : scm_i_with_guile_and_parent() + 0x36
  /usr/lib/libguile.so.17 : scm_boot_guile() + 0x35
  texmacs.bin() [0x43fc64]
  /usr/lib/libc.so.6 : __libc_start_main() + 0xf1
  texmacs.bin() [0x4452aa]

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