QtWidgets fails to build with clang 10.0-rc1 in C++20 mode

dialogs/qwizard.cpp:1241:20: error: use of overloaded operator '!=' is ambiguous (with operand types 'QWizardLayoutInfo' and 'QWizardLayoutInfo')
    if (layoutInfo != info)
        ~~~~~~~~~~ ^  ~~~~
dialogs/qwizard.cpp:259:17: note: candidate function
    inline bool operator!=(const QWizardLayoutInfo &other) { return !operator==(other); }
                ^
dialogs/qwizard.cpp:262:25: note: candidate function
bool QWizardLayoutInfo::operator==(const QWizardLayoutInfo &other)
                        ^
dialogs/qwizard.cpp:262:25: note: candidate function (with reversed parameter order)