[Bug fortran/52774] Derived-type assignment: check required to prevent double deallocation of allocatable component

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52774

Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED

--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I started work on this one. I wonder if we should give a warning about the rhs
rededfining the lhs in these test cases. I am reading in both the 2018 and 2023
drafts:

10.1.4.2, second bullet.

- if a function reference causes definition or undefinition of an actual
argument of the function, that argument or any associated entities shall not
appear elsewhere in the same statement.

I dont think it applies here, but I am not 100% certain of it.