https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93916
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to andysem from comment #4) > Are you saying that implementation is allowed to not preserve unused storage > state upon construction and assignment? Because I don't think this is what > the standard says. I disagree. It doesn't say the values of padding bits are preserved after constructing an object in that storage. > Is there any other way to achieve the effect of initializing padding in a > struct? The standard requires zero-initialization to clear all padding bits. Other forms of initialization (including copy-initialization as in your example) do not specify the effect on padding bits.
