[Bug middle-end/87363] Duplicate and bogus -Wstringop-overflow warning

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87363

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I think the *member* of the union here (the one that is active after the 
initialization) is the anonymous struct containing x and y.  That would 
surely be the case if you named the two struct members (does that make any 
difference to how GCC behaves on this testcase?), and I believe anonymous 
structs and unions purely provide a convenient syntax for accessing nested 
members, without changing other semantics from what they would be if there 
were names given to the members at every level and fully-qualified names 
were used for all member accesses.