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Blender crashes sometimes when opening files with custom logic nodes

See original GitHub issue

Issue to keep track of https://forums.armory3d.org/t/need-help-using-logic-nodes-pack/4231.

When opening a file that uses custom nodes from other packages, Blender randomly crashes sometimes with EXCEPTION_ACCESS_VIOLATION. When building Blender to get more insight about where the error occurs I get some linker errors, maybe someone else is able to build Blender and to reproduce this error and paste a stack trace from Visual Studio?

Issue Analytics

State:
Created 3 years ago
Comments:12 (1 by maintainers)

Top GitHub Comments

4reactions

MoritzBruecknercommented, Feb 28, 2021

Oh, indeed. This is awesome, great find!

Connecting and disconnecting NodeTrees could be done with scripting, I guess.

Maybe it would make sense to add this to Armory itself until the bug is fixed? I hope that the latter will happen soon, if I remember correctly the Blender devs announced that there will be another bug sprint in a few months and there recently was some action in a similar issue (I subscribed to a few related issues on the Blender bug tracker).

3reactions

ztophcommented, Feb 27, 2021

Maybe this isn’t new or just the logical conclusion from what has been found out about the bug already, but I realized this: For me, Blender doesn’t crash when opening the blend-file itself. The crash only occurs, when

I create some random Logic Node via the Node browser
the Libraries-folder with some custom node is next to the blend file
the NodeTree I want to edit is set up as a Trait Item on some scene object (via Object Properties -> Armory Traits)

If the NodeTree I want to edit is NOT connected, the crash never occurs.

So my workaround is to load the blend-file, remove the Nodetree I want to edit from EVERY object it’s used by, save the blend-file, close Blender (maybe not needed), open the blend-file again, connect the NodeTree back and I’m good to go. I can work on everything without Blender crashing (as a matter of prudence, disconnect the Nodetree again before saving).

Not great and definitely not comfortable, but works reliably. Connecting and disconnecting NodeTrees could be done with scripting, I guess.

Configuration: Windows 10 (Version 2004) / Blender 2.838 / tested with Armory SDK 2020-6, 2020-11, 2021-02

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