[Webkit-unassigned] [Bug 200577] New: Problems playing animated images in Mac high-sierra

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200577

            Bug ID: 200577
           Summary: Problems playing animated images in Mac high-sierra
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: clopez at igalia.com
                CC: sabouhallawa at apple.com

When working on bug 74779 I discovered that all the test cases I wrote (I tested the cases in bug 200537 to not spam the other)  were failing on the EWS for Mac (which happens to run MacOS high-sierra), but this test cases are working fine on the  Mac machine I have access to (that runs on Mojave).

This tests also work fine on other ports (GTK and AppleWin).

So now I believe there is an issue in high-sierra that causes that playing animated images to be broken.

The issue I see is that the animated image doesn't play beyond the first 2 or 4 frames. It gets stuck playing.

I'm attaching a patch with  3 simple test cases that pass fine on Mojave and WebKitGTK and AppleWin, but will fail here on the EWS because it runs high-sierra.

I don't have the resources to investigate this, so I'm reporting this with the hope someone else can have a look.

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