[Webkit-unassigned] [Bug 81079] New: REGRESSION(r107802-107978): Clipboard API is broken in ToT

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=81079

           Summary: REGRESSION(r107802-107978): Clipboard API is broken in
                    ToT
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: Tam at SiuLung.com


Created an attachment (id=131790)
 --> (https://bugs.webkit.org/attachment.cgi?id=131790&action=review)
test case

Open the attached html, and hit Cmd-C and then Cmd-V.
Expected: Hello and World are shown. Actual: Only World is shown.
The html calls evt.clipboardData.setData() twice on two mime types, and "Clipboard Viewer" reveals that the latter overwrites the former.

WebKit trunk has regressed as follows:
* r107802: works
* r107978 to r109142: the left output shows undefined
* r109209 onwards: the left output shows empty string

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