[Patch, fortran] PR82923 - Automatic allocation of deferred length character using function result

[Paul Richard Thomas]

The ChangeLog and the comments in the patch tell all.

Bootstrapped and regtested on FC27/x86_64.

OK for 7-branch through to trunk?

Paul

2018-05-17  Paul Thomas  <pault@gcc.gnu.org>

    PR fortran/82923
    * trans-array.c (gfc_alloc_allocatable_for_assignment): Set the
    charlen backend_decl of the rhs expr to ss->info->string_length
    so that the value in the current scope is used.

2018-05-17  Paul Thomas  <pault@gcc.gnu.org>

    PR fortran/82923
    * gfortran.dg/allocate_assumed_charlen_4.f90: New test.
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