stencilLoadOp (LoadOp::Clear) must not be set if the attachment ([TextureView]) has no stencil aspect or stencilReadOnly (0) is true.
- While validating depthStencilAttachment.
- While encoding [CommandEncoder].BeginRenderPass([RenderPassDescriptor]).
Fixed for Canary, though that also means it's broken in Stable. I'm not particularly concerned about the backwards compat, though. Stable will catch up with these deprecations soon enough.