[Bug libstdc++/101937] error: variable-sized object may not be initialized

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101937

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's not a VLA though, _M_indent is an enumerator with the value 4, and
ctx._M_index + 1 is 5.