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[Bug fortran/57284] [OOP] ICE with "find_array_spec for polymorphic arrays


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57284

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
                 CC|                            |burnus at gcc dot gnu.org,
                   |                            |janus at gcc dot gnu.org,
                   |                            |pault at gcc dot gnu.org
            Summary|ICE with "find_array_spec:  |[OOP] ICE with
                   |unused as (1)" in           |"find_array_spec  for
                   |conjunction with size()     |polymorphic arrays
                   |intrinsic on class dummy    |
                   |parameter shape             |

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
The problem is that the expression is (internally):
   a->REF_COMPONENT("_data")->REF_ARRAY(full array)

In find_array_spec, the code firsts gets the array as:
   as = CLASS_DATA (e->symtree->n.sym)->as;

And then it walks the refs. Result:
   a->(full array)->_data->(full array)

But having two full arrays is invalid! Hence, it fails.

(find_array_spec doesn't see that the two arrays refs are identical.)


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