Difference in behavior when concepts are enabled

[hgkjshegfskef]

Is it expected to have different behavior when using and not using concepts? Perhaps I just don't understand how to use the library well. In this example https://godbolt.org/z/W8bWEnoTr I explicitly request a mutable iterator, and rely on the library to provide operator->. The library provides an immutable version of operator-> when not using concepts. When using concepts, the code builds and works as expected. Any ideas?

[tzlaine]

Thanks for reporting this! Sorry it took me so long to get back to you. I was at a C++ committee meeting, then I was super sick for a few days. Thanks especially for the single-file repro!