Odd behaviour uploading buffers for compute shaders on Vulkan

[0ffz]

Posted this to Discord a few weeks back but I forgot to track it here: I've written a unit test that passes on OpenGL but not Vulkan backends here.

This test initializes a buffer with 1..n and tries to run a single iteration of a shader that multiplies inputs by two. The Vulkan backend fails, with the buffer containing random data, OpenGL multiplies correctly.

• Here's the shader exec function referenced in there, which basically just runs a task in onAfterCollect.
• Buffers are initialized via a simple helper located here
• Junit extension for setting up scene is here, this essentially just creates an empty scene.

If it would help, I can try setting up a similar extension in this repo to add to the test suite, these need to create a window to run though so I'm not sure if they'd work on a github runner. Maybe as a separate module could make sense? (If there already are shader tests somewhere that I missed let me know too!)