Bug 205666 - REGRESSION (r253926): webgl/2.0.0/conformance2/transform_feedback/unwritten-output-defaults-to-zero.html is a flaky failure
Summary: REGRESSION (r253926): webgl/2.0.0/conformance2/transform_feedback/unwritten-o...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebGL (show other bugs)
Version: WebKit Local Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2019-12-31 14:45 PST by Alexey Proskuryakov
Modified: 2020-02-07 13:50 PST (History)
4 users (show)

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Description Alexey Proskuryakov 2019-12-31 14:45:34 PST 
webgl/2.0.0/conformance2/transform_feedback/unwritten-output-defaults-to-zero.html became a very frequent flaky failure after the switch to ANGLE. This affects all hardware/software configurations.

https://results.webkit.org/?suite=layout-tests&test=webgl%2F2.0.0%2Fconformance2%2Ftransform_feedback%2Funwritten-output-defaults-to-zero.html

@@ -5,7 +5,7 @@
 [ 2: PASS ] getError was expected value: NO_ERROR : Set up program should succeed
 [ 3: FAIL ] buffer should match expected values
 [ 4: PASS ] getError was expected value: NO_ERROR : Set up program should succeed
-[ 5: PASS ] buffer should match expected values
+[ 5: FAIL ] buffer should match expected values
 [ 6: PASS ] successfullyParsed is true
-[ FAIL ] 1 failures reported
+[ FAIL ] 2 failures reported
Comment 1 Radar WebKit Bug Importer 2019-12-31 14:45:46 PST 
<rdar://problem/58257079>
Comment 2 Justin Fan 2020-02-07 13:50:22 PST 
A proper implementation that makes this test completely PASS on ANGLE backend has been landed since the last time we attempted to enable ANGLE by default, so this should not occur anymore. I'm unable to reproduce any flakiness on iMac Pro.