It turns out gdb is installed with GNU Octave: C:\Octave\Octave-4.2.2\bin>gdb --version GNU gdb (GDB) 8.0.1 Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later 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-w64-mingw32". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word". C:\Octave\Octave-4.2.2\bin> I copied that bin directory and ran gdb from the copy to avoid (possibly) creating unwanted files under C:\Octave. I'll paste the output below, but it may not help since gdb said "no debugging symbols found." Please let me know if it would be useful to execute any other gdb commands. Perhaps I should try using gdb on an inkscape.exe built as per this page: http://wiki.inkscape.org/wiki/index.php/Compiling_Inkscape_on_Windows_with_MSYS2 How can debugging symbols be created using MSYS2 ? C:\0\bin>type gdb.init set pagination off C:\0\bin>gdb "C:\Program Files\Inkscape\inkscape.exe" -ex r GNU gdb (GDB) 8.0.1 Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later 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-w64-mingw32". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from C:\Program Files\Inkscape\inkscape.exe...(no debugging symbols found)...done. Starting program: C:\Program Files\Inkscape\inkscape.exe [New Thread 13320.0x370c] [New Thread 13320.0x45fc] [New Thread 13320.0x50bc] [New Thread 13320.0x302c] [New Thread 13320.0x473c] [New Thread 13320.0x3bd0] [New Thread 13320.0x3868] [New Thread 13320.0x3970] [New Thread 13320.0x6944] [New Thread 13320.0x6a9c] [New Thread 13320.0x6f24] [New Thread 13320.0x567c] [New Thread 13320.0x2b28] [New Thread 13320.0x71d8] Thread 1 received signal SIGSEGV, Segmentation fault. 0x000000000372cfd0 in libinkscape_base!_ZN10KnotHolder20knot_clicked_handlerEP6SPKnotj () from C:\Program Files\Inkscape\libinkscape_base.dll (gdb) backtrace #0 0x000000000372cfd0 in libinkscape_base!_ZN10KnotHolder20knot_clicked_handlerEP6SPKnotj () from C:\Program Files\Inkscape\libinkscape_base.dll #1 0x0000000003a52ca1 in libinkscape_base!_ZN4sigc8internal12signal_emit2IvP6SPKnotjNS_3nilEE4emitEPNS0_11signal_implERKS3_RKj () from C:\Program Files\Inkscape\libinkscape_base.dll #2 0x000000000372c975 in libinkscape_base!_Z32sp_knot_handler_request_positionP9_GdkEventP6SPKnot () from C:\Program Files\Inkscape\libinkscape_base.dll #3 0x000000000328e2e7 in sp_marshal_BOOLEAN__POINTER () from C:\Program Files\Inkscape\libinkscape_base.dll #4 0x0000000063a46223 in ?? () from C:\Program Files\Inkscape\libgobject-2.0-0.dll #5 0x0000000063a57e77 in ?? () from C:\Program Files\Inkscape\libgobject-2.0-0.dll #6 0x0000000063a5f6d4 in ?? () from C:\Program Files\Inkscape\libgobject-2.0-0.dll #7 0x0000000063a60368 in ?? () from C:\Program Files\Inkscape\libgobject-2.0-0.dll #8 0x00000000031a5beb in libinkscape_base!_Z24sp_canvas_item_compare_zP12SPCanvasItemS0_ () from C:\Program Files\Inkscape\libinkscape_base.dll #9 0x00000000031a7b31 in libinkscape_base!_ZN8SPCanvas13handle_buttonEP10_GtkWidgetP15_GdkEventButton () from C:\Program Files\Inkscape\libinkscape_base.dll #10 0x000000006184a037 in ?? () from C:\Program Files\Inkscape\libgtk-win32-2.0-0.dll #11 0x0000000063a46223 in ?? () from C:\Program Files\Inkscape\libgobject-2.0-0.dll #12 0x0000000063a57909 in ?? () from C:\Program Files\Inkscape\libgobject-2.0-0.dll #13 0x0000000063a5f6d4 in ?? () from C:\Program Files\Inkscape\libgobject-2.0-0.dll #14 0x0000000063a60368 in ?? () from C:\Program Files\Inkscape\libgobject-2.0-0.dll #15 0x000000006195f8fd in ?? () from C:\Program Files\Inkscape\libgtk-win32-2.0-0.dll #16 0x00000000618481e1 in ?? () from C:\Program Files\Inkscape\libgtk-win32-2.0-0.dll #17 0x00000000618485bb in ?? () from C:\Program Files\Inkscape\libgtk-win32-2.0-0.dll #18 0x000000006c379592 in ?? () from C:\Program Files\Inkscape\libgdk-win32-2.0-0.dll #19 0x00000000685f22f8 in ?? () from C:\Program Files\Inkscape\libglib-2.0-0.dll #20 0x00000000685f24c8 in ?? () from C:\Program Files\Inkscape\libglib-2.0-0.dll #21 0x00000000685f2943 in ?? () from C:\Program Files\Inkscape\libglib-2.0-0.dll #22 0x0000000061847620 in ?? () from C:\Program Files\Inkscape\libgtk-win32-2.0-0.dll #23 0x000000000040606f in ?? () #24 0x000000000040e5a1 in ?? () #25 0x00000000004013c7 in ?? () #26 0x00000000004014cb in ?? () #27 0x00007ffa965d1fe4 in KERNEL32!BaseThreadInitThunk () from C:\WINDOWS\System32\kernel32.dll #28 0x00007ffa96f3cb31 in ntdll!RtlUserThreadStart () from C:\WINDOWS\SYSTEM32\ntdll.dll #29 0x0000000000000000 in ?? () ---Type to continue, or q to quit--- Backtrace stopped: previous frame inner to this frame (corrupt stack?) (gdb) On 13 June 2018 at 22:40, Alvin Penner