-Wsign-conversion warning with Clang10 on Windows

[0x8000-0000]

include\fmt/format.h(560,71): error: implicit conversion changes signedness: 'std::size_t' (aka 'unsigned long long') to 'stdext::checked_array_iterator<char *>::difference_type' (aka 'long long') [-Werror,-Wsign-conversion]
std::uninitialized_copy(begin, end, make_checked(ptr_, capacity_) + size_);

[vitaut]

Which {fmt} version?

[dcile]

{fmt} >= 6.2.1

[0x8000-0000]

fmt/include/fmt/format.h

Line 569 in 5de62af

std::uninitialized_copy(begin, end, make_checked(ptr_, capacity_) + size_);

[0x8000-0000]

https://docs.microsoft.com/en-us/cpp/standard-library/checked-array-iterator-class?view=vs-2019#op_add takes a stdext::checked_array_iterator<T*>::difference_type as argument to operator +.