An updated error log from gdb.

error.txt

(gdb) run
Starting program: /home/XXX/Desktop/graph-display-demo/graph_display /home/XXX/Desktop/sample_tlp.tlp
warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff7ffa000
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
loadPlugins info: /home/XXX/.local/share/data///plugins//lib/tulip/ - No such file or directory
loadPlugins info: /home/XXX/Desktop/lib/tulip/ - No such file or directory
loadPlugins info: /home/XXX/Desktop/lib/tulip/glyph/ - No such file or directory
loadPlugins info: /home/XXX/Desktop/lib/tulip/interactor/ - No such file or directory
loadPlugins info: /home/XXX/Desktop/lib/tulip/view/ - No such file or directory
loadPlugins info: /home/XXX/Desktop/lib/tulip/perspective/ - No such file or directory
[New Thread 0x7fffd761e700 (LWP 40349)]
QWidget::repaint: Recursive repaint detected

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff2dec152 in FTSize::CharSize (this=0x1e51578, face=0x0, 
    pointSize=20, xRes=72, yRes=72)
    at /home/XXX/tulip-build/tulip-src/thirdparty/ftgl/FTSize.cpp:49
49          err = FT_Set_Char_Size(*face, 0L, pointSize * 64, xResolution, yResolution);
(gdb) where
#0  0x00007ffff2dec152 in FTSize::CharSize (this=0x1e51578, face=0x0, 
    pointSize=20, xRes=72, yRes=72)
    at /home/XXX/tulip-build/tulip-src/thirdparty/ftgl/FTSize.cpp:49
#1  0x00007ffff2deaf98 in FTFace::Size (this=0x1e51568, size=20, res=72)
    at /home/XXX/tulip-build/tulip-src/thirdparty/ftgl/FTFace.cpp:131
#2  0x00007ffff2df3ca4 in FTFontImpl::FaceSize (this=0x1e51560, size=20, 
    res=72)
    at /home/XXX/tulip-build/tulip-src/thirdparty/ftgl/FTFont/FTFont.cpp:291
#3  0x00007ffff2df324f in FTFont::FaceSize (this=0x1bc8ca0, size=20, res=72)
    at /home/XXX/tulip-build/tulip-src/thirdparty/ftgl/FTFont/FTFont.cpp:89
#4  0x00007ffff6942409 in tlp::GlLabel::init (this=0x1bd7c50)
    at /home/XXX/tulip-build/tulip-src/library/tulip-ogl/src/GlLabel.cpp:64
#5  0x00007ffff6941dcc in tlp::GlLabel::GlLabel (this=0x1bd7c50)
    at /home/XXX/tulip-build/tulip-src/library/tulip-ogl/src/GlLabel.cpp:48
#6  0x00007ffff6954f94 in tlp::GlNode::GlNode (this=0x7fffffffc970, id=0)
    at /home/XxX/tulip-build/tulip-src/library/tulip-ogl/src/GlNode.cpp:53
#7  0x00007ffff69147fd in tlp::GlGraphRenderer::visitNodes (this=0x1bb11f0, 
    graph=0x7dd8f0, visitor=0x7fffffffca10, visitHiddenEntities=false)
    at /home/XXX/tulip-build/tulip-src/library/tulip-ogl/src/GlGraphRenderer.cpp:75
#8  0x00007ffff69146ec in tlp::GlGraphRenderer::visitGraph (this=0x1bb11f0, 
    visitor=0x7fffffffca10, visitHiddenEntities=false)
    at /home/XXX/tulip-build/tulip-src/library/tulip-ogl/src/GlGraphRenderer.cp---Type <return> to continue, or q <return> to quit---
p:56
#9  0x00007ffff6912bcb in tlp::GlGraphComposite::acceptVisitor (
    this=0x17078c0, visitor=0x1fc8e50)
    at /home/XXX/tulip-build/tulip-src/library/tulip-ogl/src/GlGraphComposite.cpp:93
#10 0x00007ffff6fbb18b in tlp::GlComposite::acceptVisitor (this=0x17075f8, 
    visitor=0x1fc8e50)
    at /home/XXX/tulip-build/tulip-src/library/tulip-ogl/include/tulip/GlComposite.h:155
#11 0x00007ffff694af9f in tlp::GlLayer::acceptVisitor (this=0x17075f0, 
    visitor=0x1fc8e50)
    at /home/XXX/tulip-build/tulip-src/library/tulip-ogl/src/GlLayer.cpp:96
#12 0x00007ffff697273f in tlp::GlScene::draw (this=0x7dd738)
    at /home/XXX/tulip-build/tulip-src/library/tulip-ogl/src/GlScene.cpp:178
#13 0x00007ffff6fc1369 in tlp::GlMainWidget::render (this=0x7dd710, 
    options=..., checkVisibility=true)
    at /home/XXX/tulip-build/tulip-src/library/tulip-gui/src/GlMainWidget.cpp:223
#14 0x00007ffff6fc1567 in tlp::GlMainWidget::draw (this=0x7dd710, 
    graphChanged=true)
    at /home/XXX/tulip-build/tulip-src/library/tulip-gui/src/GlMainWidget.cpp:286
#15 0x00007ffff6fc0e54 in tlp::GlMainWidget::paintEvent (this=0x7dd710)
---Type <return> to continue, or q <return> to quit---
    at /home/XXX/tulip-build/tulip-src/library/tulip-gui/src/GlMainWidget.cpp:164
#16 0x00007ffff5cb7a3e in QWidget::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#17 0x00007ffff3ee5c68 in QGLWidget::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtOpenGL.so.4
#18 0x00007ffff5c6a8ec in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#19 0x00007ffff5c6d25b in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#20 0x00007ffff574063e in QCoreApplication::notifyInternal(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#21 0x00007ffff5cbc6b4 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#22 0x00007ffff5e7ff9c in QWidgetPrivate::repaint_sys(QRegion const&) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#23 0x00007ffff5cab004 in QWidgetPrivate::syncBackingStore() ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#24 0x00007ffff5cb7ee4 in QWidget::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#25 0x00007ffff3ee5c68 in QGLWidget::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtOpenGL.so.4
---Type <return> to continue, or q <return> to quit---
#26 0x00007ffff5c6a8ec in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#27 0x00007ffff5c6d25b in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#28 0x00007ffff574063e in QCoreApplication::notifyInternal(QObject*, QEvent*)
    () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#29 0x00007ffff5744171 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#30 0x00007ffff576ee83 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#31 0x00007ffff2449f05 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007ffff244a248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007ffff244a304 in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007ffff576f016 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#35 0x00007ffff5d101ae in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#36 0x00007ffff574456f in QCoreApplication::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#37 0x0000000000403521 in main ()
(gdb) c
Continuing.
[Thread 0x7fffd761e700 (LWP 40349) exited]

Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
(gdb)