Deadlock in BKE_libblock_remap_locked #50385
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Reference: blender/blender#50385
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Delete Branch "%!s(<nil>)"
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?
Broken: latest master
working: 2.78a
Platform: Windows
I was looking into https://github.com/nortikin/sverchok/issues/1047#issuecomment-267672765 cause the sverchok people seemed to be at their wits end,
it's a deadlock due to recursive calls to pthread_spin_lock (pthread docs state :
The results are undefined if the calling thread holds the lock at the time the call is made.
)which apparently means "meh fine! lets carry on!" on linux, but "let me wait for this lock to become available" on windows.
Initial lock :
Later on
Changed status to: 'Open'
Added subscriber: @LazyDodo
Added subscribers: @scorpion81, @mont29
mont29 you know the relink code better than anyone else, mind taking a peek here?
Nice catch… Though am totally unsure whether nodes should create new data-blocks in update function, this sounds pretty suspicious to me. But then, Sverchok is a giant hack around Blender anyway.
I suppose it won’t be an issue to unlock around the post update call for nodetrees, though I would definitively prefer not to have to. :|
This issue was referenced by
9c756162ae
Changed status from 'Open' to: 'Resolved'