Bug 308026 – [macOS Release] http/tests/webgpu/webgpu/shader/validation/functions/restrictions.html is a flaky text failure

• Component: New Bugs
• Status: RESOLVED FIXED

[Diego De La Toba]

http/tests/webgpu/webgpu/shader/validation/functions/restrictions.html is a flaky text failure on macOS release


HISTORY:
https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Fwebgpu%2Fwebgpu%2Fshader%2Fvalidation%2Ffunctions%2Frestrictions.html


TEXT DIFF:
--- /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/http/tests/webgpu/webgpu/shader/validation/functions/restrictions-expected.txt
+++ /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/http/tests/webgpu/webgpu/shader/validation/functions/restrictions-actual.txt
@@ -159,6 +159,8 @@
 PASS :function_parameter_types:case="invalid_ptr6"
 PASS :function_parameter_types:case="invalid_ptr7"
 FAIL :function_parameter_types:case="invalid_ptr8" assert_unreached:
+  - EXPECTATION FAILED: Expected validation error
+      at (elided: below max severity)
   - VALIDATION FAILED: Missing expected compilationInfo 'error' message.
 
 
@@ -194,8 +196,6 @@
     }
     expectCompileResult@http://127.0.0.1:8000/webgpu/webgpu/shader/validation/shader_validation_test.js:73:28
     @http://127.0.0.1:8000/webgpu/webgpu/shader/validation/functions/restrictions.spec.js:313:24
-  - EXPECTATION FAILED: Expected validation error
-      at (elided: below max severity)
  Reached unreachable code
 PASS :function_parameter_matching:decl="u32"
 PASS :function_parameter_matching:decl="i32"


DIFF URL:
https://build.webkit.org/results/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/307676%40main%20(1732)/http/tests/webgpu/webgpu/shader/validation/functions/restrictions-pretty-diff.html


REPRODUCTION:
I was able to reproduce this on macOS Tahoe ToT with the following:

run-webkit-tests --release --no-retry --force --iterations 2000 --exit-after-n-failures=1 -f http/tests/webgpu/webgpu/shader/validation/functions/restrictions.html

I am going to mark expectations as pass fail while this pends investigation.

[Radar WebKit Bug Importer]

<rdar://problem/170521658>

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/58832

[EWS]

Test gardening commit 307682@main (c213d355a730): <https://commits.webkit.org/307682@main>

Reviewed commits have been landed. Closing PR #58832 and removing active labels.

[Diego De La Toba]

This appears to be a test issue where shader_validation_test.js is performing two async validation checks in parallel (GPU validation error check and compilation info message check). Since both operations run asynchronously and independently, their error messages could be logged in different orders depending on timing, causing intermittent text diff failures.

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/58834

[EWS]

Committed 307878@main (8e292742055c): <https://commits.webkit.org/307878@main>

Reviewed commits have been landed. Closing PR #58834 and removing active labels.