[Patch, fortran] PR29284 - [4.1/4.2 Regression] ICE for optional subroutine argument

[Paul Thomas]

:ADDPATCH fortran:

This is an 'obvious' patch and I will apply it tomorrow morning unless 
anybody objects.

In testing for an actual argument that is an assumed character length 
procedure, I did not test if the expression for the argument is NULL.  
This, of course, happens if an optional argument is not present and an 
ICE ensues for not doing the check.  The testcase is that provided by 
the author.

Regtested on Cygwin_NT/AMD64.

Domo arigato-gozaimasu!

Paul

2006-10-01  Paul Thomas  <pault@gcc.gnu.org>

    PR fortran/29284
    * trans-expr.c (gfc_conv_function_call): Check the expression
    is present when testing for the passing of an assumed
    character length function.

2006-10-01  Paul Thomas  <pault@gcc.gnu.org>

    PR fortran/29284
    * gfortran.dg/optional_assumed_charlen_1.f90: New test.


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