Detailed error context:
containers/cairo/cairo_images_cache.h:64:11: note: in instantiation of template class 'std::__value_type<std::string, cairo_surface_wrapper>' requested here
if(iter != m_images.end())
MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk/usr/include/c++/v1/__utility/pair.h:54:5: error: the parameter for this explicitly-defaulted copy constructor is const, but a member or base requires it to be non-const
pair(pair const&) = default;
