linked lists/trees with type-bound procedures

[Mark Rashid]

Tobias (and others) - 

Thank you for the help.  I did just install gfortran trunk, and the problem
went away.  

Regards,

Mark



>   Hi Mark,
> 
> Mark Rashid wrote:
> > Attached is a short source file containing a single (self-contained)
> module
> > that produces the errors I mentioned when compiled with gfortran 4.5. 
> I
> > have not yet tried 4.6.
> 
> I can reproduce the error with gfortran 4.5.1, however, using gfortran 
> 4.6 it compiles without any error or warning.
> 
> GCC 4.6 binaries are available from
> http://gcc.gnu.org/wiki/GFortranBinaries
> 
> An overview about the 4.5 and 4.6 work regarding polymorphic data types 
> (CLASS) and the other ingredients of object-oriented programming can be 
> found at:http://gcc.gnu.org/wiki/OOP
> As you can see there, 34 bugs (some small, some large) were already 
> fixed in 4.6 - seemingly that includes yours.
> 
> Tobias
> 
> PS: Unfortunately, adding a fully working support for polymorphism takes 
> a while - and like always in volunteer-based open-source projects, there 
> are ups and downs in the activity of the developers.* And a helping hand 
> is always welcome - as are bug reports with small examples. Thus, thanks 
> for the bug report.
> 
> * Actually, the result of the work since 4.5 (i.e. April 2010) is quite 
> impressive; for OOP see the link above, for a general overview look at 
> http://gcc.gnu.org/gcc-4.6/changes.html#Fortran
> Since 4.6 work has started, a diffstat shows
>   71 files changed, 17923 insertions(+), 8332 deletions(-)
> (That's without back-end changes, library changes, and without test
> cases.)
>