[Bug fortran/35718] deallocating non-allocated pointer target does not fail

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35718

--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
We have an unsigned short in our descriptor that we can use
for keeping track of what we allocated and where.

So, we have 16 bits. State we can keep around is:

Type of descriptor: Allocatable, pointer, passed argument.  2 bits.

Associated: No, allocated, target.  2 bits.

Contiguous: 1 bit.

Anything else we would need?  That would still leave us 11 bit in reserve.