call to 'check' is ambiguous

[MSonn]

I recently upgraded to 7.1.3 and trunk and noticed that existing code does not compile anymore:

error: call to 'check' is ambiguous
return check(arg_mapper().map(val));

A check function exists in the same namespace as the type that is used with fmt:

https://godbolt.org/z/563zYf

fully qualifying the check call in fmt fixes the issue:

fmt::detail::check(...)

[vitaut]

Fixed in 1147782, thanks for reporting.