Bug 212286

Summary:	[ANGLE - macOS] fast/canvas/webgl/simulated-vertexAttrib0-invalid-indicies.html fails to error out with a huge index
Product:	WebKit	Reporter:	Justin Fan <justin_fan>
Component:	WebGL	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	dino, jdarpinian, kbr, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:	208724, 208817
Bug Blocks:	207858

Description Justin Fan 2020-05-22 16:28:51 PDT

We should be using ANGLE's simulated vertex attribute code now, but it is failing this old test.

Comment 1 Radar WebKit Bug Importer 2020-05-22 16:29:07 PDT

<rdar://problem/63558069>

Comment 2 Kenneth Russell 2020-05-22 16:48:37 PDT

Per discussion with Justin: while the test is technically invalid (it's legal to not generate INVALID_OPERATION for the draw call), Apple's OpenGL driver doesn't support KHR_robustness or KHR_robust_buffer_access_behavior. Therefore it seems that ANGLE should be doing the index validation, discovering that the draw call is invalid, and generating an error.

Justin: could you post the current results of the test on macOS here?

Comment 3 Justin Fan 2020-05-22 16:51:50 PDT

PASS: MAX_UINT index was unable to be simulated
PASS: MAX_UINT index did not crash
FAIL: Huge index did not fail validation
PASS: Huge index did not crash