Bug 299363 – override silently breaks WGSL shaders and prevents shader compilation

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: WebGPU

Recently discovered that the following syntax:

override threadCountX: u32 = 4;

prevents the given shader to compile in Safari 26. Works perfectly fine on Google Chrome.

The solution I found was to simply declare the given override to a const...

const threadCountX: u32 = 4;

which is OK, except it would be great to allow the developer to send their own constants for setting thread group sizes etc. without breaking your app.

[Alexey Proskuryakov]

*** Bug 299364 has been marked as a duplicate of this bug. ***

[Radar WebKit Bug Importer]

<rdar://problem/161182645>

[Mike Wyrzykowski]

potentially the same as related to https://gpuweb.github.io/cts/standalone/?debug=1&q=webgpu:api,operation,compute_pipeline,overrides:computed:* which is tracked by https://bugs.webkit.org/show_bug.cgi?id=275010

[Mike Wyrzykowski]

https://gpuweb.github.io/cts/standalone/?q=webgpu:api,operation,compute_pipeline,overrides:workgroup_size:* is similar but doesn't use default values

[Mike Wyrzykowski]

It looks like we are failing when default values are used in overrides passed to `@workgroupSize`

[Tadeu Zagallo]

I'm marking it as a dupe of https://bugs.webkit.org/show_bug.cgi?id=275010, but please let us know if the issue isn't fixed.

*** This bug has been marked as a duplicate of bug 275010 ***