[MacPorts] #52191: gimp2 2.8.18_0 Crashes when using mouse with Ink tool

[MacPorts]

#52191: gimp2 2.8.18_0 Crashes when using mouse with Ink tool
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  Reporter:  madebyollin@…  |      Owner:  devans@…
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.3.4
Resolution:                 |   Keywords:
      Port:  gimp2          |
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Comment (by madebyollin@…):

 I did some more thorough testing and was **able to identify a
 (mis?)configuration which causes this crash**.

 In my input device settings (which correspond to {{{~/Library/Application
 Support/GIMP/2.8/devicerc}}}), I initially had "xquartz virtual pointer"
 mode set to "screen".  Not sure why.

 **Changing the mode of "xquartz virtual pointer" to "disabled" prevents
 the crash.  Changing the mode to "screen" from a default GIMP config
 enables the crash.**

 I've attached a video demonstrating this with stock settings (renamed my
 {{{~/Library/Application Support/GIMP/}}} folder):
 [https://trac.macports.org/attachment/ticket/52191/xquartz_virtual_pointer_mode.mp4]

 Sorry for not doing more thorough testing earlier–the fact that I can
 avoid the crash by adjusting settings is great news!  Hopefully this
 limits the scope of the issue substantially (and since it's a
 configuration-specific issue, the priority is much less than I initially
 thought).

 ----
 To answer your questions:

 > I am assuming, however, that all drawing up to and including Mouse: is
 using the tablet and at that point you switch to mouse and the crash
 occurs.

 Yes. I switch to mouse at 0:11 in the original video.  In the new video
 I've used a table to make this more clear.

 >Does the crash always occur when doing any drawing with your mouse in Ink
 tool?

 >Or the does the crash only occur when switching from tablet to mouse?

 >Can you use the mouse successfully in Ink tool if the tablet is not
 configured?

 Even if I restart GIMP and use the mouse for everything (never switching)
 it will still crash.

 Adjusting the ink tool settings (e.g. turning all sensitivities to 0 or 1,
 turning off smoothing) does not prevent the crash.

 Correcting my device settings (changing "xquartz virtual pointer" mode to
 "disabled") fixes the crash.

 > Exactly which version of upstream GIMP binary are you using for
 comparison when you say that it works correctly?

 All tests were performed on GIMP 2.8.18.  The binary is
 [http://download.gimp.org/mirror/pub/gimp/v2.8/osx/gimp-2.8.18-x86_64.dmg].

 > Anything else unique about your installation or configuration?

 I've reset my GIMP config for this video.  I'm using a custom GTK theme.
 I'm not aware of anything else unique that could be relevant.

 >Have you reported this issue to the developers upstream?

 Not yet.  The official binaries are all standalone (no XQuartz), so they
 don't have a "XQuartz Virtual Pointer" input device to configure.  The
 GIMP.org download page says "we have not investigated if it's feasible to
 build GIMP 2.8 from Macports".  But I can get in touch with them if you
 feel that's a more appropriate place for this bug.

 >Are you using the +x11 or +quartz build of the port? What does {{{port
 installed gimp2}}} return?

 {{{
 The following ports are currently installed:
   gimp2 @2.8.16_2+help_browser+python27
   gimp2 @2.8.16_3+help_browser+python27
   gimp2 @2.8.16_4+help_browser+python27
   gimp2 @2.8.18_0+help_browser+python27 (active)
 }}}

 Thanks for your help!

-- 
Ticket URL: <https://trac.macports.org/ticket/52191#comment:3>
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