[Bug libstdc++/100516] [11/12 Regression] Unexpected -Wstringop-overread in deque initialization from empty initializer_list

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100516

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Once again the problem is that GCC warns about code which is unreachable by
construction. The loop bounds are determined by the deque's "map", which is
sized correctly for the incoming range.


I don't see this with trunk, but for GCC 11 adding this to the loop body works:

                if (__n < _S_buffer_size())
                  __builtin_unreachable();