299363 2025-09-23 03:07:08 -0700 override silently breaks WGSL shaders and prevents shader compilation 2026-02-25 14:05:42 -0800 1 1 1 Unclassified WebKit WebGPU Safari 26 All macOS 26 RESOLVED DUPLICATE 275010 InRadar P2 Major --- 1 douglas.lilliequist webkit-unassigned mwyrzykowski tzagallo webkit-bug-importer oldest_to_newest 2145184 0 douglas.lilliequist 2025-09-23 03:07:08 -0700 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. 2145271 1 ap 2025-09-23 09:59:40 -0700 *** Bug 299364 has been marked as a duplicate of this bug. *** 2145291 2 webkit-bug-importer 2025-09-23 10:41:17 -0700 <rdar://problem/161182645> 2145293 3 mwyrzykowski 2025-09-23 10:46:40 -0700 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 2145296 4 mwyrzykowski 2025-09-23 11:00:13 -0700 https://gpuweb.github.io/cts/standalone/?q=webgpu:api,operation,compute_pipeline,overrides:workgroup_size:* is similar but doesn't use default values 2145297 5 mwyrzykowski 2025-09-23 11:01:29 -0700 It looks like we are failing when default values are used in overrides passed to `@workgroupSize` 2184941 6 tzagallo 2026-02-25 14:05:42 -0800 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 ***