[MacPorts] #64252: darktable @4.x+quartz: Crash when opening "darkroom" view of Sony NEX-6 AWR file

[MacPorts]

#64252: darktable @4.x+quartz: Crash when opening "darkroom" view of Sony NEX-6 AWR
file
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  Reporter:  thomasrussellmurphy       |      Owner:  mascguy
      Type:  defect                    |     Status:  closed
  Priority:  Normal                    |  Milestone:
 Component:  ports                     |    Version:  2.7.0
Resolution:  fixed                     |   Keywords:  pending
      Port:  darktable GraphicsMagick  |
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Comment (by mascguy):

 Replying to [comment:34 jmroot]:
 > I'd be very wary of assuming this to be a compiler bug. Yes, those exist
 sometimes, but when code mysteriously behaves differently, it is much more
 likely to be the optimiser taking different shortcuts in response to
 undefined behaviour in the code. I guess +debug probably compiles with
 -O0, hiding the issue, so to diagnose this it might be necessary to add -g
 to the normal flags in order to get line number information in the
 backtrace. (Note that the build directory needs to be present at runtime
 for this to work, so use port's -k flag to keep it.)

 For sure, an optimization-related bug seems like a good possibility.
 Eventually I'll revisit this in more detail, though my first priority was
 to ensure it's no longer a blocker for Thomas and other users.

 First I'd like to disable the GraphicsMagick lib signal handler though,
 per your comments in issue:65630.

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Ticket URL: <https://trac.macports.org/ticket/64252#comment:35>
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