[Webkit-unassigned] [Bug 276607] New: Unable to load a font face on nxp imx8mp platform

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=276607

            Bug ID: 276607
           Summary: Unable to load a font face on nxp imx8mp platform
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WPE WebKit
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: plampe at igalia.com
                CC: bugs-noreply at webkitgtk.org

When WebKit WPE port is built using gcc 13.2.0 for nxp imx8mp (aarch64-poky-linux-gcc, aarch64-poky-linux-g++) font face API is basically not working as it's not loading font faces.

It turns out the problem is here: https://github.com/WebKit/WebKit/blob/9878e30a6f7350aca54e860251f34971e6aed1f6/Source/WebCore/css/FontFace.cpp#L87 and what happens is, dataRequiresAsynchronousLoading lambda capture (by reference) behaves as if it was capture by copy and therefore even tho we set the value to false in lambda, the dataRequiresAsynchronousLoading is true after WTF::switchOn() call... So it's likely some compiler bug as e.g. disabling optimizations for that function using #pragma GCC optimize ("O0") helps.

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