[Bug c/65892] gcc fails to implement N685 aliasing of union members

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65892

--- Comment #14 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
That C++ wording doesn't have any obvious bearing on what "it is 
permitted" is intended to be an exception to - the general 
implementation-defined nature of type punning (which I think was the 
original intent in C90), or the aliasing rules.