(gdb) bt
#0  0x0000000041429eff in ?? ()
#1  0x00007fac9e8fb912 in ?? ()
   from /usr/lib/nvidia-346/libnvidia-glcore.so.346.82
#2  0x00007fac9e514958 in ?? ()
   from /usr/lib/nvidia-346/libnvidia-glcore.so.346.82
#3  0x00000000004d1abf in PointArray::drawPoints(QGLShaderProgram&, TransformState const&, double, bool) const ()
#4  0x00000000004da63f in View3D::drawPoints(TransformState const&, std::vector<Geometry const*, std::allocator<Geometry const*> > const&, double, bool) ()
#5  0x00000000004dade2 in View3D::paintGL() ()
#6  0x00007faca370c6e4 in QGLWidget::glDraw() ()
   from /usr/lib/x86_64-linux-gnu/libQt5OpenGL.so.5
#7  0x00007faca37096f9 in QGLWidget::paintEvent(QPaintEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5OpenGL.so.5
#8  0x00007faca2cf5302 in QWidget::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007faca2cb9c8c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007faca2cbee56 in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007faca4204c2d in QCoreApplication::notifyInternal(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007faca2cefbea in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion cons---Type <return> to continue, or q <return> to quit---
t&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007faca2cc64c1 in QWidgetPrivate::repaint_sys(QRegion const&) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007faca2ce5e4f in QWidgetPrivate::syncBackingStore() ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007faca2cf5112 in QWidget::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007faca2cb9c8c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007faca2cbee56 in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007faca4204c2d in QCoreApplication::notifyInternal(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007faca4206e07 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007faca4251cd3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007faca0bc7e04 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007faca0bc8048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007faca0bc80ec in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007faca425198c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop:---Type <return> to continue, or q <return> to quit---
:ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007faca420396b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007faca420a0e1 in QCoreApplication::exec() ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x0000000000489032 in main ()

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(gdb) c
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x000000004112feff in ?? ()
(gdb) bt
#0  0x000000004112feff in ?? ()
#1  0x00007f427b795912 in ?? ()
#2  0x0000000000000000 in ?? ()
(gdb) quit
A debugging session is active.

    Inferior 1 [process 6462] will be detached.

Quit anyway? (y or n) EOF [assumed Y]
Detaching from program: /usr/local/bin/displaz-gui, process 6462
hans@hans-pc:~$ ls
anaconda  Dev               Installs                   model.png  point_cloud.png  s2t70.png                           temp       tmp_line1.txt   _tmp_locations.txt             towers_test_NG4TQ_1_0.tree.gz
Code      Documents         matlab_crash_dump.1078-1   Music      Programs         Scripts                             Templates  tmp_line2.ewkt  toplog.txt                     Videos
Data      Downloads         model_fitted_close-up.png  out        Public           takilberan_tower0.png               test7.txt  tmp_line2.txt   towers_test_NG4TQ_1_0.json.gz
Desktop   examples.desktop  model_fitted.png           Pictures   ROAMES_git       takilberan_transposition_tower.png  test.txt   tmp_line3.txt   towers_test_NG4TQ_1_0.rdf
hans@hans-pc:~$ sudo gdb displaz-gui $(ps -A | grep displaz-gui | awk '{print $1}')
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from displaz-gui...(no debugging symbols found)...done.
Attaching to program: /usr/local/bin/displaz-gui, process 7378
Reading symbols from /lib64/ld-linux-x86-64.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/ld-2.19.so...done.
done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
0x00007f41b8ef512d in ?? ()
(gdb) c
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x0000000041693eff in ?? ()
(gdb) bt
#0  0x0000000041693eff in ?? ()
#1  0x00007f41b5ac1912 in ?? ()
#2  0x0000000000000000 in ?? ()
(gdb)