[Webkit-unassigned] [Bug 228838] New: REGRESSION (r280507): ASSERTION FAILED: !undominatedPhis.contains(value) in JSC::B3::(anonymous namespace)::Validater::validatePhisAreDominatedByUpsilons()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=228838

            Bug ID: 228838
           Summary: REGRESSION (r280507): ASSERTION FAILED:
                    !undominatedPhis.contains(value) in
                    JSC::B3::(anonymous
                    namespace)::Validater::validatePhisAreDominatedByUpsil
                    ons()
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com

testb3 is failing on JSC debug bots, I see the following assertion failure in the logs:

ASSERTION FAILED: !undominatedPhis.contains(value)
./b3/B3Validate.cpp(680) : void JSC::B3::(anonymous namespace)::Validater::validatePhisAreDominatedByUpsilons()

I think it may have started with https://trac.webkit.org/changeset/280507/webkit according to https://results.webkit.org/?suite=javascriptcore-tests&test=testb3

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