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Maniphest T83625

Naming Vertex Color attribute as "snout, Snout" causes shader error.
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Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.90.1, branch: master, commit date: 2020-09-23 06:43, hash: rB3e85bb34d0d7
Also seems to be broken in 2.91.0
Worked:

Short description of error
Naming vertex color attribute to word "Snout" or with a little variance of capital letters causes shader not to compile. If the attribute is named in full capitals such as "SNOUT" the shader can compile.

vertexColorAttributeNamingIssue.blend770 KBDownload

Exact steps for others to reproduce the error

  1. Use the default cube.
  2. Create a new vertex color attribute for it.
  3. Add some colors through vertex painting.
  4. Name the Attribute as "Snout" or snout.
  5. Create a material (use emissive) and plug the created vertex color attribute into the color input.
  6. Shader won't compile
  7. Rename vertex color "Snout" attribute to something else.
  8. Update material attribute input name to match the renamed one.
  9. Shader compiles again.

Revisions and Commits

rB Blender
rB2db277092d83 Fix T83625: Shading attribute names cause compilation error.
rB6c777ed76b3d Fix T83625: Shading attribute names cause compilation error.
rBffb6648a970e Fix T83625: Shading attribute names cause compilation error.

Related Objects

Event Timeline

Teemu (TMug) renamed this task from Naming Vertex Color attribute as "snout, Snout" or causes shader error. to Naming Vertex Color attribute as "snout, Snout" causes shader error..Dec 10 2020, 12:41 PM
Teemu (TMug) created this task.
Stanislav Blinov (radcapricorn) awarded a token.Dec 10 2020, 4:00 PM
Robert Guetzkow (rjg) changed the task status from Needs Triage to Confirmed.Dec 10 2020, 4:22 PM
Robert Guetzkow (rjg) added projects: OpenGL Error, EEVEE & Viewport.
Robert Guetzkow (rjg) added a subscriber: Robert Guetzkow (rjg).

This seems to cause an invalid name to be generated internally:

ERROR (gpu.shader): MAMaterial VertShader:
      |
  114 | DEFINE_ATTR(vec4, aowS4__haaaa);
      |
      | Error:  C7528: OpenGL reserves names containing '__'
Jeroen Bakker (jbakker) closed this task as Resolved by committing rBffb6648a970e: Fix T83625: Shading attribute names cause compilation error..Dec 18 2020, 10:00 AM
Jeroen Bakker (jbakker) claimed this task.
Jeroen Bakker (jbakker) added a commit: rBffb6648a970e: Fix T83625: Shading attribute names cause compilation error..
Jeroen Bakker (jbakker) mentioned this in T77348: Blender LTS: Maintenance Task.Dec 18 2020, 10:01 AM
Jeroen Bakker (jbakker) added a commit: rB6c777ed76b3d: Fix T83625: Shading attribute names cause compilation error..Jan 13 2021, 11:42 AM
Jeroen Bakker (jbakker) added a commit: rB2db277092d83: Fix T83625: Shading attribute names cause compilation error..Jan 13 2021, 2:32 PM