https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78551
--- Comment #8 from Vlad Petric <vlad at petric dot cc> ---
(In reply to Vlad Petric from comment #7)
> Ok, so the example that I started this bug with is not standard compliant
> because it initialized different elements in a union with the constexpr
> constructor.
>
> The following does just one. I believe that the following is
> standard-compliant code (though obviously I could be wrong)
>
> And it generates a segfault.
>
> struct A {
> union {
> long s;
> char d[4];
> };
> constexpr A (char x) : d("") { d[0] = x; }
> };
>
> A a{'a'};
clang 3.8/4.0 have no problem with the above code.
Personally I think that we should change the main attachment and the tag - to
segfault on valid code (worse than ICE ...).
