[Bug middle-end/89091] ICE: Segmentation fault (in tree_class_check)

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89091

David Malcolm <dmalcolm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-01-28
                 CC|                            |dmalcolm at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Confirmed, at -O1 and above.

Segfaults reading through NULL "unsigned_type" here in decode_field_reference:

4325      /* Compute the mask to access the bitfield.  */
4326      unsigned_type = lang_hooks.types.type_for_size (*pbitsize, 1);
4327      precision = TYPE_PRECISION (unsigned_type);