Interference between lensfun and gphoto causes darktable to crash

[adventure-tense]

The original bug submission started with darktable. When darktable completes an import of images, it begins to process thumbnails. During that process, there is a conflict between two dependencies within darktable. One of those dependencies is lensfun. Darktable then crashes.

Below is a link to the crash submission at darktable. It includes a full crash report.

darktable-org/darktable#13637 (comment)

Github member parafin reviewed the crash report, and matched it to the problematic code. I'm not a programmer, so I quote his comments directly below ...

parafin wrote "The crash seems to be caused by lensfun doing setlocale call in thread 6 while gphoto is doing sprintf in thread 11 (which depends on locale). So it's an interference between two darktable dependencies (lensfun and gphoto) due to multi-threading. This has to be fixed upstream in lensfun, it mustn't do setlocale calls, since it's not thread-safe and affects the whole application.

Offending line is here: https://github.com/lensfun/lensfun/blob/release_0.3.x/libs/lensfun/lens.cpp#L253

I suggest to report it to lensfun."

I hope this submission is helpful.

[adventure-tense]

I see a bit of activity here. Does this mean a resolution to the crash bug in darktable could be forthcoming? Not being a programmer, I'm not sure what the process will be.