[Webkit-unassigned] [Bug 253547] New: The 'length' argument of U16_FWD_1 in TextUtil::breakWord is wrong

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=253547

            Bug ID: 253547
           Summary: The 'length' argument of U16_FWD_1 in
                    TextUtil::breakWord is wrong
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Hironori.Fujii at sony.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

The 'length' argument of U16_FWD_1 in TextUtil::breakWord is wrong

If I applied bug#215318 patch, fast/text/midword-break-before-surrogate-pair.html is failing as assertion failure for WinCairo debug, and it is failing as infinite loop for WinCairo release.

> ASSERTION FAILED: middle >= left && middle < right
> C:\home\webkit\gc\Source\WebCore\layout/formattingContexts/inline/text/TextUtil.cpp(276) : WebCore::Layout::TextUtil::breakWord::<lambda_1>::operator ()

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