Program received signal SIGSEGV, Segmentation fault. 0x00007fcc2658abd7 in ?? () from /lib/x86_64-linux-gnu/libc.so.6 (gdb) bt #0 0x00007fcc2658abd7 in ?? () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007fcc2658d6c0 in malloc () from /lib/x86_64-linux-gnu/libc.so.6 #2 0x00007fcc26b44dad in operator new(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #3 0x00007fcc26ba0249 in std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator const&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #4 0x00007fcc26ba0e0b in std::string::_Rep::_M_clone(std::allocator const&, unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #5 0x00007fcc26ba0ea4 in std::string::reserve(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #6 0x00007fcc26ba1266 in std::string::append(unsigned long, char) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #7 0x00007fcc2726aa47 in charMatrix::row_as_string ( this=this@entry=0x7fffc944fc30, r=r@entry=0, strip_ws=strip_ws@entry=false) at ../octave/liboctave/array/chMatrix.cc:94 #8 0x00007fcc286f7ee1 in octave_char_matrix_str::string_value ( this=) at ../octave/libinterp/octave-value/ov-str-mat.cc:238 #9 0x00007fcc288c598e in string_value (this=, force=false) at ../octave/libinterp/octave-value/ov.h:908 #10 warning_enabled (id="Octave:missing-glyph") at ../octave/libinterp/corefcn/error.cc:679 #11 0x00007fcc288c5c3a in warning_1(const char *, const char *, typedef __va_lis---Type to continue, or q to quit--- t_tag __va_list_tag *) (id=0x7fcc28c4dae2 "Octave:missing-glyph", fmt=0x7fcc28c4da10 "text_renderer: skipping missing glyph for character '%x'", args=args@entry=0x7fffc944fec8) at ../octave/libinterp/corefcn/error.cc:728 #12 0x00007fcc288c6195 in vwarning_with_id (id=, fmt=, args=args@entry=0x7fffc944fec8) at ../octave/libinterp/corefcn/error.cc:793 #13 0x00007fcc288c6227 in warning_with_id ( id=id@entry=0x7fcc28c4dae2 "Octave:missing-glyph", fmt=fmt@entry=0x7fcc28c4da10 "text_renderer: skipping missing glyph for character '%x'") at ../octave/libinterp/corefcn/error.cc:801 #14 0x00007fcc288ed5dd in warn_missing_glyph (c=) at ../octave/libinterp/corefcn/ft-text-renderer.cc:67 #15 octave::ft_text_renderer::process_character (this=this@entry=0x444fb20, code=54, previous=previous@entry=17) at ../octave/libinterp/corefcn/ft-text-renderer.cc:728 #16 0x00007fcc288edc6b in octave::ft_text_renderer::visit (this=0x444fb20, e=...) at ../octave/libinterp/corefcn/ft-text-renderer.cc:887 #17 0x00007fcc288eef7d in visit (e=..., this=0x444fb20) at ../octave/libinterp/corefcn/txt-eng.h:326 #18 octave::ft_text_renderer::visit (this=0x444fb20, e=...) at ../octave/libinterp/corefcn/ft-text-renderer.cc:928 #19 0x00007fcc288eb2ff in octave::ft_text_renderer::render ( this=this@entry=0x444fb20, elt=elt@entry=0x2de7640, box=..., ---Type to continue, or q to quit--- rotation=rotation@entry=0) at ../octave/libinterp/corefcn/ft-text-renderer.cc:1126 #20 0x00007fcc288ec4ca in octave::ft_text_renderer::text_to_pixels ( this=0x444fb20, txt="0.6", pxls=..., box=..., _halign=, valign=2, rotation=, interpreter=..., handle_rotation=true) at ../octave/libinterp/corefcn/ft-text-renderer.cc:1255 #21 0x00007fcc28bd1601 in octave::text_renderer::text_to_pixels ( this=0x7fffc94511b8, txt="0.6", pxls=..., bbox=..., halign=1, valign=2, rotation=0, interpreter=..., handle_rotation=handle_rotation@entry=true) at ../octave/libinterp/corefcn/text-renderer.cc:116 #22 0x00007fcc28908885 in octave::opengl_renderer::text_to_pixels ( this=, txt=..., pixels=..., bbox=..., halign=, valign=, rotation=) at ../octave/libinterp/corefcn/gl-render.cc:4202 #23 0x00007fcc28914a8d in octave::opengl_renderer::render_text ( this=0x7fffc9451050, txt="0.6", x=0.60000000000000009, y=-0.014619883040935672, z=0, halign=1, valign=2, rotation=0) at ../octave/libinterp/corefcn/gl-render.cc:4230 #24 0x00007fcc2890fe9f in octave::opengl_renderer::render_ticktexts ( this=0x7fffc9451050, ticks=..., ticklabels=..., lim1=0, lim2=1, p1=-0.014619883040935672, p2=0, xyz=0, ha=1, va=2, wmax=@0x7fffc9450988: 16, hmax=@0x7fffc945098c: 13) at ../octave/libinterp/corefcn/gl-render.cc:1038 ---Type to continue, or q to quit--- #25 0x00007fcc2890c224 in octave::opengl_renderer::draw_axes_x_grid ( this=this@entry=0x7fffc9451050, props=...) at ../octave/libinterp/corefcn/gl-render.cc:1508 #26 0x00007fcc289113e0 in octave::opengl_renderer::draw_axes ( this=0x7fffc9451050, props=...) at ../octave/libinterp/corefcn/gl-render.cc:2052 #27 0x00007fcc2890911e in octave::opengl_renderer::draw (this=0x7fffc9451050, go=..., toplevel=) at ../octave/libinterp/corefcn/gl-render.cc:665 #28 0x00007fcc2926dd05 in octave::opengl_renderer::draw ( this=this@entry=0x7fffc9451050, hlist=..., toplevel=toplevel@entry=false) at ../octave/libinterp/corefcn/gl-render.h:60 #29 0x00007fcc28915756 in octave::opengl_renderer::draw_figure ( this=0x7fffc9451050, props=...) at ../octave/libinterp/corefcn/gl-render.cc:744 #30 0x00007fcc2890911e in octave::opengl_renderer::draw ( this=this@entry=0x7fffc9451050, go=..., toplevel=toplevel@entry=true) at ../octave/libinterp/corefcn/gl-render.cc:665 #31 0x00007fcc292598f9 in QtHandles::GLCanvas::draw (this=0x2bf48d0, gh=...) at ../octave/libgui/graphics/GLCanvas.cc:66 #32 0x00007fcc29248afd in QtHandles::Canvas::canvasPaintEvent (this=0x2bf48f8) at ../octave/libgui/graphics/Canvas.cc:319 #33 0x00007fcc25546760 in QGLWidget::glDraw() () ---Type to continue, or q to quit--- from /usr/lib/x86_64-linux-gnu/libQtOpenGL.so.4 #34 0x00007fcc255448e9 in QGLWidget::paintEvent(QPaintEvent*) () from /usr/lib/x86_64-linux-gnu/libQtOpenGL.so.4 #35 0x00007fcc24a80300 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #36 0x00007fcc2554f6b1 in QGLWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtOpenGL.so.4 #37 0x00007fcc24a30e2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #38 0x00007fcc24a374a0 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #39 0x00007fcc244ff4dd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #40 0x00007fcc24a7aa21 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #41 0x00007fcc24c3bb9b in QWidgetPrivate::repaint_sys(QRegion const&) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #42 0x00007fcc24a6fe47 in QWidgetPrivate::syncBackingStore() () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #43 0x00007fcc24a7fe7a in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #44 0x00007fcc2554f6b1 in QGLWidget::event(QEvent*) () ---Type to continue, or q to quit--- from /usr/lib/x86_64-linux-gnu/libQtOpenGL.so.4 #45 0x00007fcc24a30e2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #46 0x00007fcc24a374a0 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #47 0x00007fcc244ff4dd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #48 0x00007fcc24502b3d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #49 0x00007fcc2452cf83 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #50 0x00007fcc1d47fe04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #51 0x00007fcc1d480048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #52 0x00007fcc1d4800ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #53 0x00007fcc2452c7a1 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #54 0x00007fcc24ad2be6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #55 0x00007fcc244fe0af in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #56 0x00007fcc244fe3a5 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #57 0x00007fcc24503b79 in QCoreApplication::exec() () ---Type to continue, or q to quit--- from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #58 0x00007fcc291e4f02 in octave::gui_application::execute ( this=this@entry=0x7fffc9452280) at ../octave/libgui/src/octave-gui.cc:248 #59 0x0000000000401062 in main (argc=9, argv=0x7fffc9452488) at ../octave/src/main-gui.cc:104