http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54392
--- Comment #11 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-08-29 16:20:43 UTC --- I'm sorry, you are right - it's been a while since the last time I looked into this code - going that way of the conditional is Ok, because the memory corresponding to the source (which coincide with that of the destination string) is deallocated only after all the chars are copied. Good. Thus it means that in general, we want, again to change _M_disjoint not to check that the destination is the empty rep, but precisely for this more general case, that is, the source begin is the same as the this->begin() beginning, and the size is this->size() + 1 and return true. We have to add an overload, because the current one doesn't take the size of the source. I think this is it.
