C:\cygwin\home\buildbot\slave\win-release\build\Source\WebCore\ForwardingHeaders\wasm/js/JSWebAssemblyModule.h(2): fatal error C1083: Cannot open include file: 'JavaScriptCore/JSWebAssemblyModule.h': No such file or directory (compiling source file C:\cygwin\home\buildbot\slave\win-release\build\Source\WebCore\bindings\js\JSBindingsAllInOne.cpp) [C:\cygwin\home\buildbot\slave\win-release\build\WebKitBuild\Release\Source\WebCore\WebCore.vcxproj] https://build.webkit.org/builders/Apple%20Win%20Release%20%28Build%29/builds/678/steps/compile-webkit/logs/stdio
I think this is related to https://trac.webkit.org/changeset/215353/webkit
I'm working on this now.
This should be fixed in: https://trac.webkit.org/changeset/215373/webkit