[Bug middle-end/117002] [13/14/15 Regression] lifetime.d: In function ‘_d_newclassT’: error: size of array element is not a multiple of its alignment with -Warray-bounds and -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117002

--- Comment #5 from Iain Buclaw <ibuclaw at gcc dot gnu.org> ---
(In reply to Iain Buclaw from comment #4)
> I'm going to call this a bug in the D front-end.
> 
> https://godbolt.org/z/EYvcfE4aK
> 
> extern(C++) class Foo {
>     ubyte[4] not_multiple_of_8;
> }
> 
> static assert(__traits(classInstanceAlignment, Foo) == 8);
> static assert(__traits(classInstanceSize, Foo) == 16);
> 
> The classInstanceSize returns 12.
And for D classes (which have both a __vptr and __monitor field), the instance
size is 20, instead of 24.