This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 115b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2024-08-20
It appears that the following example may have unwanted undefined behavior in C++, although not in C:
struct A { int x, y; }; A passthrough(A a) { return a; } int main(void) { A a; a.x = 0; return passthrough(a).x; }
The default memberwise copying operation is not specified to be done in a way that is insensitive to indeterminate values.