https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106669
--- Comment #1 from Hannes Hauswedell <h2+bugs at fsfe dot org> --- This affects GCC 10.4 and GCC 11.3 since move-only views were backported. The following part of the draft standard also needs changing: https://eel.is/c++draft/range.all#general-2.1 ---> decay-copy(E) if that expression is well-formed and the decayed type of E models view. This will make references to move-only views pick the second option (ref_view).