[Webkit-unassigned] [Bug 246526] New: [Fetch API] Headers iteration should not happen on cached headers list

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=246526

            Bug ID: 246526
           Summary: [Fetch API] Headers iteration should not happen on
                    cached headers list
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rakuco at webkit.org

See https://github.com/web-platform-tests/wpt/pull/36455

FetchHeaders::Iterator seems to cache a FetchHeaders' keys at the time iteration starts, so if the same instance is modified during iteration not all changes will be visible.

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