[Patch, fortran] PR49630 - [OOP] ICE on obsolescent deferred-length type bound character function

[Paul Richard Thomas]

I got caught with a wild goose chase with this one. I tried to get it
to work before seeing the standard reference in trans-expr.c. In fact,
it would be impossible to fix because there is no way to resolve
different instances of the abstract interface with different character
lengths.

Bootstrapped and regtested on FC28/x86_64 - OK for trunk.

I do not intend to backport it unless there is any enthusiasm for me to do so.

Regards

Paul

2018-06-19  Paul Thomas  <pault@gcc.gnu.org>

    PR fortran/49630
    * resolve.c (resolve_contained_fntype): Change standard ref.
    from F95 to F2003: C418. Correct a spelling error in a comment.
    It is an error for an abstract interface to have an assumed
    character length result.
    * trans-expr.c (gfc_conv_procedure_call): Likewise change the
    standard reference.

2018-06-19  Paul Thomas  <pault@gcc.gnu.org>

    PR fortran/49630
    * gfortran.dg/assumed_charlen_function_7.f90: New test.
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