Bug 186811

Summary:	We shouldn't need to initialize subclasses of Arrays twice.
Product:	WebKit	Reporter:	Keith Miller <keith_miller>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Keith Miller 2018-06-19 12:06:06 PDT

We initialize subclasses of Array because we might need to allocate a new structure to change indexing types during initialization. If this triggered a GC then we might scan our currently uninitialized array and crash. If we had a GCDeferralContext then we could avoid this.