[Bug fortran/67497] data.c sanitizer runtime error: null pointer passed as argument 2, which is declared to never be null

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67497

--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in trunk:

../../gcc7/gcc/fortran/data.c:191:32: runtime error: null pointer passed as
argument 2, which is declared to never be null

here:

memcpy (&dest[start], rvalue->value.character.string, len * sizeof
(gfc_char_t));

Probably len==0 and preponing an if(len) should do the trick