Hello, I vaguely remember there was a recent, maybe within last two months, discussion about semantics of union initialization where sizeof(first member) is less than sizeof(union). The question was whether it's okay to initialize just that first member and leave garbage bits in the other, larger, members of the union, like in this example:
union A { char a; long : 0; }; void fn(void *); void my(void) { union A a = { 0 }; fn(&a); } (except in my example there's no other named member, but I think the example in that discussion was less contrived) Perhaps somebody remembers where it was (I'm thinking Bugzilla) and could point me to it? My attempts to search for it aren't turning anything up so far. If someone knows what semantics GCC implements, that also would be welcome. Thank you. Alexander