[Bug c++/90938] [9/10 Regression] Initializing array with {1} works, but not {0}

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90938

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #0)
>             (write_expression): Trim trailing zero-initializers from arrays
>             of trivial type.

I assume this is the problem. {} will default construct, but {0} does not, and
should not be turned into default construction.