qtnetworkauth build failure at qabstractoauth2.cpp:81:27

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -pipe -stdlib=libc++ -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -mmacosx-version-min=10.10 -O2 -std=c++1z  -arch x86_64 -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Werror -Wno-error=#warnings -Wno-error=deprecated-declarations -fPIC -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_NETWORKAUTH_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_NAMESPACE=TestNamespace -I. -I../../include -I../../include/QtNetworkAuth -I../../include/QtNetworkAuth/5.9.0 -I../../include/QtNetworkAuth/5.9.0/QtNetworkAuth -I/Users/qt/work/install/lib/QtGui.framework/Headers -I/Users/qt/work/install/lib/QtCore.framework/Headers/5.9.0 -I/Users/qt/work/install/lib/QtCore.framework/Headers/5.9.0/QtCore -I/Users/qt/work/install/lib/QtNetwork.framework/Headers -I/Users/qt/work/install/lib/QtCore.framework/Headers -I.moc -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/OpenGL.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/AGL.framework/Headers -I/usr/local/opt/openssl/include -I/Users/qt/work/install/mkspecs/macx-clang -F/Users/qt/work/install/lib -o .obj/qoauth1signature.o qoauth1signature.cpp
 qabstractoauth2.cpp:81:27: error: base class 'TestNamespace::QAbstractOAuthPrivate' is uninitialized when used here to access  'TestNamespace::QAbstractOAuthPrivate::authorizationUrl' [-Werror,-Wuninitialized]
    QAbstractOAuthPrivate(authorizationUrl, manager)
                          ^
 1 error generated.
 make[2]: *** [.obj/qabstractoauth2.o] Error 1
 make[2]: *** Waiting for unfinished jobs....
 make[1]: *** [sub-oauth-make_first-ordered] Error 2
 make: *** [sub-src-make_first] Error 2