[Webkit-unassigned] [Bug 68100] New: REGRESSION (r78846): Text misaligned vertically within table cell with valign="top" attribute and <sup> tags

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=68100

           Summary: REGRESSION (r78846): Text misaligned vertically within
                    table cell with valign="top" attribute and <sup> tags
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: HasReduction, Regression
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ddkilzer at webkit.org
                CC: hyatt at apple.com, mitz at webkit.org
        Depends on: 54244


* SUMMARY
Commit r78846 for Bug 54244 caused a regression when a table cell has a valign="top" attribute, the superscript tag (<sup></sup>) is used in the text in the cell, and other text in the cell has any other kind of tag.

* STEPS TO REPRODUCE
1. Load attached test case.

* EXPECTED RESULTS
The text (with the exception of the ® symbol) should all have the same baseline.

* ACTUAL RESULTS
The text that's outside of any tag (except <TD></TD> tags) has the wrong baseline.

* REGRESSION
This is a regression from r78846.  The autospade script said r78842 worked and r78846 failed, but the only commit in that range that makes sense is r78846.

* NOTES
Compare attached screenshots by switching between tabs to see which text should be lower.  (The text of the test case is a bit misleading.)

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