In testing gcc-4.1-20050716 for i686:

I originally ran into the following error

  internal compiler error: tree check: expected tree that contains 'decl
minimal' structure, have 'record_type'  in lookup_decl_die, at dwarf2out.c:5461

on the last line of a program.  While starting to come up with
a minimal test case, I was surprised to find that although
I could reproduce that error with preprocessed source,
stripping out the lines starting with # produced a different error:

x.ii: In instantiation of '__gnu_cxx::rope<char, std::allocator<char> >':
x.ii:42429:   instantiated from here
x.ii:41107: internal compiler error: in force_decl_die, at dwarf2out.c:12621

This is probably fortunate, since it now dies much sooner than at the
end of the program.  

To reproduce this, unpack http://kegel.com/gcc/ice-rope.ii.gz,
then compile it with

i686-unknown-linux-gnu-gcc -g -Wall -Werror -funsigned-char -c

Apologies for not finding a small testcase,
and for using a week-old snapshot for testing.
Hopefully this is useful anyway.