Apparent regression in gfortran 4.1 and 4.2

[Brooks Moses]

Tobias Burnus wrote:
> Martin Reinecke wrote:
>>  complex arg1 (:)
>>  real, optional :: arg2 (:)
> 
> 
>>    arg1 = arg1 + arg2
>>                     1
>>Error: 'arg2' at (1) is an array and OPTIONAL; it cannot therefore be an
>>actual argument of an ELEMENTAL procedure unless there is a non-optional
>>argument with the same rank (12.4.1.5)
>>
>>Is this code really ill-formed? If yes, how would it be written correctly?
>>If it is a gfortran bug, please let me know and I'll open a PR.
> 
> This seems to be a bug in gfortran as both arrays have the same rank
> (namely one).

Also worth noting is that the procedure, as shown in the original post, 
is not in fact an ELEMENTAL procedure, despite what the error claims.

- Brooks