[Bug c++/95559] GCC accepts "too many braces around scalar initializer " in the version of 6.1 - 8.4

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95559

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
That's the same case, initializing an int with {{}}.  GCC 8 compiled the second
testcase, but that was fixed in r269045.