Problem with optional argument in type-bound, character-valued function

[Janus Weil]

Dominique,

> The test works for me with gcc version 4.5.0 20100209 (experimental) [trunk revision 156618] (GCC)
> or gcc version 4.5.0 20091125 (experimental) [trunk revision 154654] (GCC):

are you sure it works? The output could be correct just because the
memory location of the optional arg is zero by chance. You should look
at the dump and see if a zero is passed for the actual arg or not.

Cheers,
Janus