[Webkit-unassigned] [Bug 138869] New: Crash in LowerDFGToLLVM - WTF::CrashOnOverflow::overflowed()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=138869

            Bug ID: 138869
           Summary: Crash in LowerDFGToLLVM -
                    WTF::CrashOnOverflow::overflowed()
    Classification: Unclassified
           Product: WebKit
           Version: 420+
          Hardware: Macintosh Intel
               URL: https://beta.pam.no
                OS: Mac OS X 10.10
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: thomas at pam.no

Created attachment 241856
  --> https://bugs.webkit.org/attachment.cgi?id=241856&action=review
Stack trace from crash

This crash happened on https://beta.pam.no, which is a fairly heavy Ember js app. 

It seems the crash happened on a FTL Worklist Worker Thread while compiling with LLVM.

See attached stack trace for details.

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