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Add more debugging for MacOS audio crash

Dmitry Kazakov requested to merge dkazakov/krita:kazakov/macos-audio-crash into master

Hi, @freyalupen and @ivany!

Could you please test the package built for this MR? It adds a bit of debugging into stdout, so we could trace the reasons for a crash a little bit better.

Don't forget to run the package in a terminal to get all the stdout debugging lines.

My hypothesis is:

  1. It might be that the SDL plugin is installed somehow incorrectly on MacOS
  2. MLT fails to load it
  3. MLT API returns null somewhere
  4. We are trying to access the member of this pointer (hence address=0x38 in the log, which also means that the structure we are trying to access has at least 5 pointer-like fields)
  5. Crash

Now we just need to find out, where do we get this null pointer from

Related to bug: https://bugs.kde.org/show_bug.cgi?id=490181

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