This is a regression introduced with the commit https://bugs.webkit.org/show_bug.cgi?id=197131 The WPE Qt port was not updated to C++17 and this leaded to a compilation error. In file included from DerivedSources/ForwardingHeaders/wtf/HashTraits.h:28, from DerivedSources/ForwardingHeaders/wtf/glib/GRefPtr.h:28, from ../../Source/WebKit/UIProcess/API/wpe/qt/WPEQtView.h:31, from ../../Source/WebKit/UIProcess/API/wpe/qt/WPEQmlExtensionPlugin.cpp:24: DerivedSources/ForwardingHeaders/wtf/Optional.h:322:68: error: expected ‘)’ before ‘,’ token template <class... Args> explicit Optional_base(std::in_place_t, Args&&... args) ~ ^ ) [...] Full log here https://paste.ubuntu.com/p/nvWmBjpq65/ I'm going to upload a patch for this.
Created attachment 368563 [details] Patch
Comment on attachment 368563 [details] Patch Clearing flags on attachment: 368563 Committed r245516: <https://trac.webkit.org/changeset/245516>
All reviewed patches have been landed. Closing bug.
<rdar://problem/50945871>