I think this is related to broken Google search at How do I tell Google my search terms are requirements and not mere suggestions?. I think this question is a particular case of the general problem.
I need to search for the terms c++ implicit template instantiation -flto. Because -flto has a dash I quote it "-flto". Search is not honoring my quotes and omits the term, but asks me if it should be included by further quoting the quoted term which has already been quoted twice. Ad infinitum:
How do I enter my terms so Google provides search results for them?