maintainer-feedback requested: [Bug 230464] www/webkit2-gtk3: fails to build with libc++ 7

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Bug 230464: www/webkit2-gtk3: fails to build with libc++ 7
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230464



--- Description ---
$ poudriere jail -cj clang7 -a amd64 -v projects/clang700-import -m svn+https
$ poudriere testport -j clang7 www/webkit2-gtk3
[...]
In file included from Source/JavaScriptCore/llint/LLIntOffsetsExtractor.cpp:28:
In file included from Source/JavaScriptCore/bytecode/ArrayProfile.h:29:
In file included from Source/JavaScriptCore/runtime/Structure.h:28:
In file included from Source/JavaScriptCore/runtime/ClassInfo.h:25:
In file included from Source/JavaScriptCore/interpreter/CallFrame.h:30:
In file included from Source/JavaScriptCore/runtime/VM.h:40:
In file included from
Source/JavaScriptCore/runtime/FunctionHasExecutedCache.h:28:
In file included from /usr/include/c++/v1/unordered_map:385:
In file included from /usr/include/c++/v1/__node_handle:16:
/usr/include/c++/v1/optional:171:29: error: redefinition of
'bad_optional_access'
class _LIBCPP_EXCEPTION_ABI bad_optional_access
			    ^
DerivedSources/ForwardingHeaders/wtf/Optional.h:295:7: note: previous
definition is here
class bad_optional_access : public std::logic_error {
      ^

build log: https://ptpb.pw/GBGh