Bug 91245 – webkit_unit_test CCLayerTreeHostImplTest.testRemoveRenderPasses started failing.

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Vsevolod Vlasov]

CCLayerTreeHostImplTest.testRemoveRenderPasses fails on Chromium Linux build.
Probably caused by: http://trac.webkit.org/changeset/122525
See: http://build.chromium.org/p/chromium.webkit/builders/Webkit%20Linux%2032/builds/20930

[Vsevolod Vlasov]

Skipped: http://trac.webkit.org/changeset/122576

[Dana Jansens]

A better bot backtrace:

	base::debug::StackTrace::StackTrace() [0x7fc4cb993592]
	base::(anonymous namespace)::StackDumpSignalHandler() [0x7fc4cb9f85a5]
	0x7fc4c4929af0
	WTF::OwnPtr<>::operator->() [0x7fc4cde270a0]
	(anonymous namespace)::configureRenderPassTestData() [0x7fc4cde1644d]
	(anonymous namespace)::CCLayerTreeHostImplTest_testRemoveRenderPasses_Test::TestBody() [0x7fc4cde16abc]

[Dana Jansens]

Created attachment 152270 [details]
Patch

The test won't crash for me locally. >_<

From examing the code, this is the only iffy thing I can see. Do you think it would be a good condidate to fix the problem, enne?

[Adrienne Walker]

(In reply to comment #3)
> Created an attachment (id=152270) [details]
> Patch
> 
> The test won't crash for me locally. >_<
> 
> From examing the code, this is the only iffy thing I can see. Do you think it would be a good condidate to fix the problem, enne?

That really doesn't look like it should be null.

Is this a debug vs. release issue? Does a try job crash for you, and can you try the patch there?

[Dana Jansens]

Idk what's up with the trybots but I am unable to apply this change. Even if I remove everything except the "fix". It seems like the trybots are maybe sitting at some version prior to the breaking even occuring.

Either way, I think this change is needed, as it is valid for the compiler to release() the pointer before we deref it for the id().

[Adrienne Walker]

Comment on attachment 152270 [details]
Patch

R=me.  I can buy that argument that renderPass could be null here if the args are evaluated right-to-left.  Let's give this a try.  Please watch the bots when you land this.

[Dana Jansens]

Committed r122602: <http://trac.webkit.org/changeset/122602>

[Dana Jansens]

Looks like the bots went green :D