connector movement crash inkscape (libavoid)

[Weber Samuel]

Inkscape version: Inkscape 0.92.1 r
OS: Linux 4.10.4-1-ARCH

When moving a group attached to a connector, inkscape crash randomly (core dump).
May be related to other old bug.

Here are the gdb trace:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffe9d03700 (LWP 16704)]
[New Thread 0x7fffe9502700 (LWP 16705)]
[New Thread 0x7fffe8d01700 (LWP 16706)]
[New Thread 0x7fffe6c98700 (LWP 16707)]
[New Thread 0x7fffe6497700 (LWP 16708)]
[New Thread 0x7fffe5074700 (LWP 16712)]
[Thread 0x7fffe5074700 (LWP 16712) exited]
inkscape: libavoid/visibility.cpp :231 : static double Avoid::PointPair::pos_to_angle(double, double): l'assertion « ang >= 0 » a échoué.

Thread 1 "inkscape" received signal SIGABRT, Aborted.
0x00007ffff0796a10 in raise () from /usr/lib/libc.so.6

(gdb) bt
#0 0x00007ffff0796a10 in raise () at /usr/lib/libc.so.6
#1 0x00007ffff079813a in abort () at /usr/lib/libc.so.6
#2 0x00007ffff078f607 in __assert_fail_base () at /usr/lib/libc.so.6
#3 0x00007ffff078f6b2 in () at /usr/lib/libc.so.6
#4 0x0000000000e1a002 in Avoid::vertexSweep(Avoid::VertInf*) ()
#5 0x0000000000e1a190 in Avoid::shapeVisSweep(Avoid::ShapeRef*) ()
#6 0x0000000000e1155e in Avoid::Router::processTransaction() ()
#7 0x00000000006ea1bc in SPDocument::ensureUpToDate() ()
#8 0x00000000006f9ece in Inkscape::DocumentUndo::maybeDone(SPDocument*, char const*, unsigned int, Glib::ustring const&) ()
#9 0x0000000000760707 in sp_selection_move(Inkscape::Selection*, double, double) ()
#10 0x0000000000d3671e in Inkscape::UI::Tools::SelectTool::root_handler(_GdkEvent*) ()
#11 0x0000000000d49aea in Inkscape::UI::Tools::sp_event_context_virtual_root_handler(Inkscape::UI::Tools::ToolBase*, _GdkEvent*) ()
#12 0x0000000000970001 in sp_marshal_INT__POINTER_POINTER ()
#13 0x00007ffff1c27f75 in g_closure_invoke () at /usr/lib/libgobject-2.0.so.0
#14 0x00007ffff1c39f82 in () at /usr/lib/libgobject-2.0.so.0
#15 0x00007ffff1c4266f in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
#16 0x00007ffff1c42faf in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
#17 0x000000000084b283 in ()
#18 0x000000000084bb63 in ()
#19 0x000000000096fdec in sp_marshal_BOOLEAN__POINTER ()
#20 0x00007ffff1c27f75 in g_closure_invoke () at /usr/lib/libgobject-2.0.so.0
#21 0x00007ffff1c3a37d in () at /usr/lib/libgobject-2.0.so.0
#22 0x00007ffff1c4266f in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
#23 0x00007ffff1c42faf in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
#24 0x000000000089edfc in SPCanvas::emitEvent(_GdkEvent*) ()
#25 0x00007ffff4ddc7ac in () at /usr/lib/libgtk-x11-2.0.so.0
#26 0x00007ffff1c27ecf in g_closure_invoke () at /usr/lib/libgobject-2.0.so.0
#27 0x00007ffff1c3a37d in () at /usr/lib/libgobject-2.0.so.0
#28 0x00007ffff1c4266f in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
#29 0x00007ffff1c42faf in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
#30 0x00007ffff4ef48cc in () at /usr/lib/libgtk-x11-2.0.so.0
#31 0x00007ffff4f082ff in gtk_window_propagate_key_event () at /usr/lib/libgtk-x11-2.0.so.0
#32 0x00007ffff4f0adcb in () at /usr/lib/libgtk-x11-2.0.so.0
#33 0x00007ffff4ddc7ac in () at /usr/lib/libgtk-x11-2.0.so.0
#34 0x00007ffff1c27f75 in g_closure_invoke () at /usr/lib/libgobject-2.0.so.0
#35 0x00007ffff1c3a37d in () at /usr/lib/libgobject-2.0.so.0
#36 0x00007ffff1c4266f in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
#37 0x00007ffff1c42faf in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
#38 0x00007ffff4ef48cc in () at /usr/lib/libgtk-x11-2.0.so.0
#39 0x00007ffff4ddb04f in gtk_propagate_event () at /usr/lib/libgtk-x11-2.0.so.0
#40 0x00007ffff4ddb32b in gtk_main_do_event () at /usr/lib/libgtk-x11-2.0.so.0
#41 0x00007ffff4a5246c in () at /usr/lib/libgdk-x11-2.0.so.0
#42 0x00007ffff194f5a7 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#43 0x00007ffff194f810 in () at /usr/lib/libglib-2.0.so.0
#44 0x00007ffff194fb32 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#45 0x00007ffff4dda3a7 in gtk_main () at /usr/lib/libgtk-x11-2.0.so.0
#46 0x00000000006b240a in sp_main_gui(int, char const**) ()
#47 0x00007ffff0783511 in __libc_start_main () at /usr/lib/libc.so.6
#48 0x00000000006ae65a in _start ()

[jazzynico (jazzynico)]

Thanks for taking the time to file a report!

Not reproduced on Xubuntu 16.04, Inkscape 0.91, lp:inkscape/0.92.x rev. 15405 and lp:inkscape rev. 15606 (I randomly moved each group about 20 times).

The backtrace seems to show an issue with a specific angle. Do you remember the position of the objects when Inkscape crashed? Maybe you still have an automatic save in your user directory?

[Weber Samuel (gwendald)]

You're welcome.

In fact, even if i simply open the file with inkscape, i don't see all the connector until I move a group.

I manage to reproduced this bug "easily": open the file in attachment, select the "PMF" block, then spam →←↑↓←↑→↓ in a random way, then it crash. Always with the same error message:

inkscape: libavoid/visibility.cpp :231 : static double Avoid::PointPair::pos_to_angle(double, double): l'assertion « ang >= 0 » a échoué.
zsh: abort (core dumped) inkscape test_bug.svg

[jazzynico (jazzynico)]

Reproduced (after many tries) on Windows 7 (64-bit) with lp:inkscape/0.92.x rev. 15407 (32-bit version). Same backtrace.

[jazzynico (jazzynico)]

The best option would be to update our local copy of libavoid, as explained in bug #1353833 "Update libavoid, libcola and libvpsc code" (https://bugs.launchpad.net/inkscape/+bug/1353833). Our version is 8 years old, and the upstream code is still updated regularly.

[Julian Foad (julianfoad)]

Reproduced on Ubuntu 16.04, Inkscape 0.92.2+68~ubuntu16.04.1

Bug #1711252 is a duplicate of this. Now marked as such, and added "(libavoid)" to title of this one.

[Patrick Storz (ede123)]

Have you tried reproducing the issue on master?

The relevant libraries have been updated in
  https://gitlab.com/inkscape/inkscape/commit/fd733201b82f39655488a286c89142f321ef9dc9
as described in bug #1353833.

In case it fixes the issue reported here:
I don't know if it makes sense to back-port this to 0.92.x; I subscribed Sylvain, though, maybe he can comment on this...

[Sylvain Chiron (frigory)]

Hi,

According to my tests, I tried to fix some bugs, but wasn’t able to; my update of the libraries did not improve anything else than the update.

Currently, a build of the master branch freezes quickly on my computer and I have no idea of why. Meanwhile, the 0.92.x branch fails to compile. Unfortunately I have neither the necessary skills nor spare time…

Thanks anyway for subscribing me to this thread.

[Nathan Lee (nathan.lee)]

Hi - thanks for reporting this bug, I've manually migrated it to Inkscape's new bug tracker on GitLab, and closed it here.

I was unable to ascertain if this was fixed in 1.0alpha/master, but replicated it in 0.92.4.

Please feel free to file new bugs about the issues you're seeing at
http://inkscape.org/report.

Moved to: https://gitlab.com/inkscape/inbox/issues/481
Closed by: https://gitlab.com/nathanal