[Webkit-unassigned] [Bug 156097] New: Changing canvas height immediately after page load does not relayout canvas

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156097

            Bug ID: 156097
           Summary: Changing canvas height immediately after page load
                    does not relayout canvas
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Macintosh
                OS: OS X 10.11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nkronlage at hotmail.com
                CC: simon.fraser at apple.com

Created attachment 275373
  --> https://bugs.webkit.org/attachment.cgi?id=275373&action=review
Repro

Load the attached test.html (or go to http://www.colorizephoto.com/safaribug/test.html).  This html contains a canvas and some javascript to increase the height of that canvas.

Expected:
The blue canvas is very tall ~1000px tall.

Actual:
The blue canvas is only ~150px tall.


This repros on Mac Safari 9.1, Safari Technical Preview 9.1.1, WebKit Nightly 9.1 (11601.5.17.1) and on Safari on iOS 9.3.1.

Note, this is very similar to Chrome bug 598212 (https://bugs.chromium.org/p/chromium/issues/detail?id=598212), but does not have the exact same repro.

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