Bug 261820

Summary:	JS test stress/proxy-set-failure-inline-cache.js.bytecode-cache is flaky
Product:	WebKit	Reporter:	Michael Catanzaro <mcatanzaro>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	mcatanzaro, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	PC
OS:	Linux

Description Michael Catanzaro 2023-09-20 07:50:45 PDT

This one particular test stress/proxy-set-failure-inline-cache.js.bytecode-cache has been flaky for several months now. I've just been slow to create a bug report:

Running stress/proxy-set-failure-inline-cache.js.default
Running stress/proxy-set-failure-inline-cache.js.bytecode-cache
stress/proxy-set-failure-inline-cache.js.bytecode-cache: Exception: Error: Bad value: 0!
stress/proxy-set-failure-inline-cache.js.bytecode-cache: shouldBe@proxy-set-failure-inline-cache.js:4:24
stress/proxy-set-failure-inline-cache.js.bytecode-cache: @proxy-set-failure-inline-cache.js:35:13
stress/proxy-set-failure-inline-cache.js.bytecode-cache: global code@proxy-set-failure-inline-cache.js:36:3
stress/proxy-set-failure-inline-cache.js.bytecode-cache: Command '/home/jenkins/workspace/WebKit-JSC/label/ppc64le/WebKitBuild/Release/bin/jsc proxy-set-failure-inline-cache.js --useFTLJIT=false --useFunctionDotArguments=true --validateExceptionChecks=true --useDollarVM=true --maxPerThreadStackUsage=1572864 --useFTLJIT=true' failed
stress/proxy-set-failure-inline-cache.js.bytecode-cache: ERROR: Unexpected exit code: 3

This is with a cloop build. The test sometimes succeeds and sometimes fails on at least x86_64 and ppc64le runners. This is currently the only test in the entire stress testsuite that is flaky and I believe only the .bytecode-cache version of the test ever fails.

Let's see if I can reproduce the failure locally.

Comment 1 Michael Catanzaro 2023-09-20 09:08:27 PDT

(In reply to Michael Catanzaro from comment #0)
> Let's see if I can reproduce the failure locally.

I can reproduce. When I run the test locally it always fails with the above error. But also, all of the subtests .lockdown, .mini-mode, and .default fail in addition to .bytecode-cache.

Comment 2 Radar WebKit Bug Importer 2023-09-27 07:51:14 PDT

<rdar://problem/116121402>