[Webkit-unassigned] [Bug 157143] New: DebuggerScope::className() should not assert scope->isValid().

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=157143

            Bug ID: 157143
           Summary: DebuggerScope::className() should not assert
                    scope->isValid().
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mark.lam at apple.com

DebuggerScope::className() should not assert scope->isValid() because the TypeProfiler logs objects it encounters, and may indirectly call JSObject::calculatedClassName() on those objects later, thereby calling DebuggerScope::className() on an invalidated DebuggerScope.  The existing handling in DebuggerScope::className() for an invalidated scope (that returns a null string) is sufficient.

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