[Webkit-unassigned] [Bug 40047] New: REGRESSION(60409): document.write is not synchronous when using the HTML5 parser

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=40047

           Summary: REGRESSION(60409): document.write is not synchronous
                    when using the HTML5 parser
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: eric at webkit.org
                CC: hyatt at apple.com, ian at hixie.ch, abarth at webkit.org


REGRESSION(60409): document.write is not synchronous when using the HTML5 parser

It's unclear from the spec:
http://www.whatwg.org/specs/web-apps/current-work/multipage/apis-in-html-documents.html#document.write()

But it seems to me that document.write() should wait until all parsing is "done" for the write before returning.

In the old parser this was not an issue, as it was not as aggressive about yielding.  The new HTML5 parser yields when waiting for script loads or for stylesheet loads.

http://www.whatwg.org/specs/web-apps/current-work/multipage/scripting-1.html#running-a-script
talks about queuing tasks on the task queue, but it doesn't really talk about the parser yielding.

The old parser never seems to wait for <script src=""> tags during parsing (in violation of HTML5) nor does it block inline <script> tags ever (which HTML5 says it should for style-sheets), so I think that's how it produces a synchronous document.write behavior.

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