Segmentation fault in MockImpl::unmocked() when compiled with mingw64

[adbancroft]

This code crashes when compiled with [mingw64, Windows 11, gcc v15.2.0] but correctly throws an exception on [ubuntu 22.04, gcc 13.0.0]. AFAIK, both are compiled with the same set of flags.

The crash occurs on the fakeit.handle(event); in the unmocked() method:

        void unmocked() {
            ActualInvocation<> invocation(Invocation::nextInvocationOrdinal(), UnknownMethod::instance());
            UnexpectedMethodCallEvent event(UnexpectedType::Unmocked, invocation);
            auto &fakeit = getMockImpl(this)->_fakeit;
            fakeit.handle(event);

            std::string format = fakeit.format(event);
            UnexpectedMethodCallException e(format);
            throw e;
        }

Debugger shows fakeit with a zero address on mingw64?

Is there some magic compiler flag that should be applied on mingw64?

[FranckRJ]

Mingw isn't supported, we have no test covering it.