[Bug libstdc++/116471] Strange/bogus static_assert in ranges::copy / move algorithms

[dangelog at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116471

--- Comment #4 from Giuseppe D'Angelo <dangelog at gmail dot com> ---
Created attachment 58984
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58984&action=edit
patch v1

Attaching a patch for this + PR108846 , since the testcases basically cover
both in one go.