C++ bug in mainline?

[Martin Reinecke]

Hi,

the following piece of code compiles fine with gcc 2.95.2 and
the current 3.0 branch, but the current mainline gives confusing
error messages:

class foo {
  friend void bar () {}
  foo baz () {}
};

Reading specs from /afs/mpa/data/martin/ugcc/lib/gcc-lib/i686-pc-linux-gnu/3.1/specs
Configured with: /scratch/gcc/configure --prefix=/afs/mpa/data/martin/ugcc --enable-languages=c++ --enable-namespaces
Thread model: single
gcc version 3.1 20011005 (experimental)
 /afs/mpa/data/martin/ugcc/lib/gcc-lib/i686-pc-linux-gnu/3.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__
-D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__
-D__tune_i686__ -D__tune_pentiumpro__ testvec.cxx -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase testvec.cxx -version -o
/tmp/ccNdC9Oc.s
GNU CPP version 3.1 20011005 (experimental) (cpplib) (i386 Linux/ELF)
GNU C++ version 3.1 20011005 (experimental) (i686-pc-linux-gnu)
        compiled by GNU C version 3.1 20011005 (experimental).
ignoring nonexistent directory "/afs/mpa/data/martin/ugcc/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /afs/mpa/data/martin/ugcc/include/g++-v3
 /afs/mpa/data/martin/ugcc/include/g++-v3/i686-pc-linux-gnu
 /afs/mpa/data/martin/ugcc/include/g++-v3/backward
 /usr/local/include
 /afs/mpa/data/martin/ugcc/include
 /afs/mpa/data/martin/ugcc/lib/gcc-lib/i686-pc-linux-gnu/3.1/include
 /usr/include
End of search list.
testvec.cxx:3: invalid return type for member function `foo foo::baz()'
testvec.cxx:3:   because the following virtual functions are abstract:
testvec.cxx:2:  void bar()


The strange thing is that bar() is neither virtual nor abstract.
Is this a known problem?

Cheers,
  Martin