octave:1> backend ("fltk"); figure (1, "visible", "off") octave:2> Program received signal SIGSEGV, Segmentation fault. 0xb6100956 in glMatrixMode () from /usr/lib/mesa/libGL.so.1 (gdb) bt #0 0xb6100956 in glMatrixMode () from /usr/lib/mesa/libGL.so.1 #1 0xb28985f0 in setup_viewport (this=0x8536258, xx=0, yy=20, ww=640, hh=440) at DLD-FUNCTIONS/fltk_backend.cc:136 #2 OpenGL_fltk::resize (this=0x8536258, xx=0, yy=20, ww=640, hh=440) at DLD-FUNCTIONS/fltk_backend.cc:120 #3 0xb28941e8 in show_menubar (this=0x85352b0, xfp=, hh=, ww=, yy=, xx=) at DLD-FUNCTIONS/fltk_backend.cc:765 #4 plot_window::plot_window (this=0x85352b0, xfp=, hh=, ww=, yy=, xx=) at DLD-FUNCTIONS/fltk_backend.cc:728 #5 0xb2894a2c in do_new_window () at DLD-FUNCTIONS/fltk_backend.cc:1541 #6 new_window () at DLD-FUNCTIONS/fltk_backend.cc:1419 #7 __fltk_redraw__ () at DLD-FUNCTIONS/fltk_backend.cc:1735 #8 0xb2894ca2 in F__fltk_redraw__ () at DLD-FUNCTIONS/fltk_backend.cc:1874 #9 0xb788b789 in octave_builtin::do_multi_index_op (this=0x80aefe8, nargout=0, args=..., lvalue_list=0x0) at ov-builtin.cc:128 #10 0xb788bf8f in octave_builtin::do_multi_index_op (this=0x80aefe8, nargout=0, args=...) at ov-builtin.cc:98 #11 0xb795748a in octave_value::do_multi_index_op (this=0xbfffcaa8, nargout=0, idx=...) at ov.cc:1266 ---Type to continue, or q to quit--- #12 0xb774d4f2 in feval (name=..., args=..., nargout=0) at oct-parse.yy:4133 #13 0xb76c58e9 in input_event_hook () at input.cc:1265 #14 0xb6eaf902 in command_editor::event_handler () at cmd-edit.cc:888 #15 0xb5f12e9a in rl_read_key () from /lib/libreadline.so.6 #16 0xb5efd09e in readline_internal_char () from /lib/libreadline.so.6 #17 0xb5efd5ed in readline () from /lib/libreadline.so.6 #18 0xb6eb6afd in octave_rl_readline (prompt=0x84ee674 "octave:2> ") at oct-rl-edit.c:166 #19 0xb6eaf6e7 in gnu_readline::do_readline (this=0x8067390, prompt=..., eof=@0xbfffcdef) at cmd-edit.cc:252 #20 0xb6eb0c62 in command_editor::readline (prompt=..., eof=@0xbfffcdef) at cmd-edit.cc:913 #21 0xb76c0e94 in gnu_readline (s=..., force_readline=false) at input.cc:204 #22 0xb76c2cd5 in interactive_input (s=..., force_readline=248) at input.cc:250 #23 0xb76c3041 in octave_gets (buf=0x84b6928 "", max_size=8192) at input.cc:280 #24 get_user_input (buf=0x84b6928 "", max_size=8192) at input.cc:351 #25 octave_read (buf=0x84b6928 "", max_size=8192) at input.cc:373 #26 0xb76ca245 in yy_get_next_buffer () at lex.cc:3097 #27 0xb76d5c07 in octave_lex () at lex.cc:2939 #28 0xb7752e4d in octave_parse () at oct-parse.cc:2411 #29 0xb7822a2d in main_loop () at toplev.cc:567 #30 0xb77caefc in octave_main (argc=6, argv=0xbfffdb24, embedded=0) at octave.cc:933 ---Type to continue, or q to quit--- #31 0x080487d3 in main (argc=6, argv=0xbfffdb24) at main.c:35