[Webkit-unassigned] [Bug 65159] New: column-count: 0 should not prevent margin-collapse through

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=65159

           Summary: column-count: 0 should not prevent margin-collapse
                    through
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: phiw at l-c-n.com
                CC: hyatt at apple.com


Created an attachment (id=101962)
 --> (https://bugs.webkit.org/attachment.cgi?id=101962&action=review)
test case (requires Ahem font)

Since bug 64975, -webkit-column-count: 0 incorrectly prevents collapsing of margins of children with the margins of the parent (multi-col) element.

The spec says (for column-count): "Values must be greater than 0"
http://dev.w3.org/csswg/css3-multicol/#cc

-webkit-column-count: 0 is then invalid and should be ignored.

Test case: there should be no red, and 20px space between the 3 blocks.

Opera 11.5 and Gecko 1.9.2+ handle this correctly.

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