c++/8442: Wrongful compiler error - file available

[Wolfgang Bangerth]

>    Yes, Spirit is a complex beast. I'm sorry about that. I've tried
> extracting the error bits, but I've been uncuccessful so far. It seems

Start from the .ii file you have. First delete all the # lines, I use the 
following perl script for that usually
  perl -pi -s 's/^#.*\n//g;' your_file.ii
(This way, gcc tells you the real location in the file where something is 
happening, not the location in the file from which you generated the .ii 
file.) Then start deleting parts of the file that are not necessary to 
show the problem. (Function bodies, classes that are only referenced in 
the function bodies you deleted, classes and namespaces that were only 
used in classes and namespaces you deleted, etc). In the beginning, the 
pieces you scrap are usually small, but the blocks can become very large 
at the end, so don't be scared if you don't make much progress in the 
beginning.

This is a tedious task, and may take an hour or two, but in the end you
usually end up with something that has 10-50 lines of code and still shows
the problem. With such an example, it is also possible for someone who is
not used to your code to see whether this is wrong or right. Otherwise, it
is very hard to see...

Regards
  Wolfgang

-------------------------------------------------------------------------
Wolfgang Bangerth              email:           bangerth@ticam.utexas.edu
                               www: http://www.ticam.utexas.edu/~bangerth