[Bug fortran/68147] Potential incorrect code generation for string self-assignment

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68147

--- Comment #15 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This is fixed on trunk and 6-branch (so it will be in the
next release).  5-branch still to do.