[Webkit-unassigned] [Bug 180692] New: REGRESSION(r225769): Build errors with constexpr std::tie on older gcc

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180692

            Bug ID: 180692
           Summary: REGRESSION(r225769): Build errors with constexpr
                    std::tie on older gcc
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Ms2ger at igalia.com
                CC: bfulgham at webkit.org, darin at apple.com,
                    dbates at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

See <https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20Ubuntu%20LTS%20%28Build%29/builds/8173/steps/compile-webkit/logs/stdio> for errors like

../../Source/WebCore/platform/graphics/FontSelectionAlgorithm.h: In member function ‘constexpr bool WebCore::FontSelectionRange::operator==(const WebCore::FontSelectionRange&) const’:
../../Source/WebCore/platform/graphics/FontSelectionAlgorithm.h:287:5: error: call to non-constexpr function ‘std::tuple<_Elements& ...> std::tie(_Elements& ...) [with _Elements = {const WebCore::FontSelectionValue, const WebCore::FontSelectionValue}]’
     }
     ^

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