[Bug c++/44778] New: [4.6 regression?] Behaviour change with pointers to members

["martin at mpa-garching dot mpg dot de" <gcc-bugzilla at gcc dot gnu dot org>]

The attached testcase is compiled without complaints by g++ 4.4.2 and 4.5.0,
but is rejected by current trunk. I'm quite sure that it was still accepted by
the trunk a few days ago.
Is this change intended, i.e. is the test case ill-formed and g++ has stricter
checks now?

~/tmp>g++ -v -Wfatal-errors temptest.cc
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/afs/mpa/data/martin/ugcc/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /scratch/martin/gcc/configure --disable-bootstrap
--enable-gold --enable-plugins --prefix=/afs/mpa/data/martin/ugcc
--with-ppl=/afs/mpa/data/martin/numlibs64
--with-cloog=/afs/mpa/data/martin/numlibs64
--with-libelf=/afs/mpa/data/martin/numlibs64 --enable-languages=c++,fortran
--enable-target=all --enable-checking=release
Thread model: posix
gcc version 4.6.0 20100701 (experimental) [trunk revision 161665] (GCC) 
COLLECT_GCC_OPTIONS='-v' '-Wfatal-errors' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
 /afs/mpa/data/martin/ugcc/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/cc1plus
-quiet -v -D_GNU_SOURCE temptest.cc -quiet -dumpbase temptest.cc -mtune=generic
-march=x86-64 -auxbase temptest -Wfatal-errors -version -o /tmp/ccS9t2f9.s
GNU C++ (GCC) version 4.6.0 20100701 (experimental) [trunk revision 161665]
(x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.6.0 20100628 (experimental) [trunk revision
161485], GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.1
warning: GMP header version 4.3.2 differs from library version 4.3.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/afs/mpa/data/martin/ugcc/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:

/afs/mpa/data/martin/ugcc/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../include/c++/4.6.0

/afs/mpa/data/martin/ugcc/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../include/c++/4.6.0/x86_64-unknown-linux-gnu

/afs/mpa/data/martin/ugcc/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../include/c++/4.6.0/backward
 /usr/local/include
 /afs/mpa/data/martin/ugcc/include
 /afs/mpa/data/martin/ugcc/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include
 /afs/mpa/data/martin/ugcc/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include-fixed
 /usr/include
End of search list.
GNU C++ (GCC) version 4.6.0 20100701 (experimental) [trunk revision 161665]
(x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.6.0 20100628 (experimental) [trunk revision
161485], GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.1
warning: GMP header version 4.3.2 differs from library version 4.3.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 5f71a12a0438e83fd7b8caa75cf5702d
temptest.cc: In member function 'void Healpix_Map<T>::Import_nograde(const
Healpix_Map<T>&)':
temptest.cc:19:25: error: invalid use of 'Healpix_Map<T>::ring2nest(int) const'
to form a pointer-to-member-function
compilation terminated due to -Wfatal-errors.


~/tmp>g++ -v -c -Wfatal-errors temptest.cc
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/scratch/martin/ugcc45/libexec/gcc/x86_64-unknown-linux-gnu/4.5.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /scratch/martin/gcc45/configure --disable-bootstrap
--enable-gold --enable-plugins --prefix=/scratch/martin/ugcc45
--with-mpfr=/afs/mpa/data/martin/numlibs64
--with-gmp=/afs/mpa/data/martin/numlibs64
--with-mpc=/afs/mpa/data/martin/numlibs64
--with-ppl=/afs/mpa/data/martin/numlibs64
--with-cloog=/afs/mpa/data/martin/numlibs64
--with-libelf=/afs/mpa/data/martin/numlibs64 --enable-languages=c++,fortran
--enable-target=all --enable-checking=release
Thread model: posix
gcc version 4.5.1 20100615 (prerelease) [gcc-4_5-branch revision 160776] (GCC) 
COLLECT_GCC_OPTIONS='-v' '-c' '-Wfatal-errors' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 /scratch/martin/ugcc45/libexec/gcc/x86_64-unknown-linux-gnu/4.5.1/cc1plus
-quiet -v -D_GNU_SOURCE temptest.cc -quiet -dumpbase temptest.cc -mtune=generic
-march=x86-64 -auxbase temptest -Wfatal-errors -version -o /tmp/ccbESmf0.s
GNU C++ (GCC) version 4.5.1 20100615 (prerelease) [gcc-4_5-branch revision
160776] (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.4.2, GMP version 4.3.1, MPFR version 2.4.2,
MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:

/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../include/c++/4.5.1

/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../include/c++/4.5.1/x86_64-unknown-linux-gnu

/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../include/c++/4.5.1/backward
 /usr/local/include
 /scratch/martin/ugcc45/include
 /scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/include
 /scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/include-fixed
 /usr/include
End of search list.
GNU C++ (GCC) version 4.5.1 20100615 (prerelease) [gcc-4_5-branch revision
160776] (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.4.2, GMP version 4.3.1, MPFR version 2.4.2,
MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: f67756f729cefbeb791a25b18e9799ee
COLLECT_GCC_OPTIONS='-v' '-c' '-Wfatal-errors' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 as -V -Qy --64 -o temptest.o /tmp/ccbESmf0.s
GNU assembler version 2.19.1 (x86_64-unknown-linux-gnu) using BFD version (GNU
Binutils) 2.19.1
COMPILER_PATH=/scratch/martin/ugcc45/libexec/gcc/x86_64-unknown-linux-gnu/4.5.1/:/scratch/martin/ugcc45/libexec/gcc/x86_64-unknown-linux-gnu/4.5.1/:/scratch/martin/ugcc45/libexec/gcc/x86_64-unknown-linux-gnu/:/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/:/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/
LIBRARY_PATH=/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/:/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/scratch/martin/ugcc45/lib/gcc/x86_64-unknown-linux-gnu/4.5.1/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-c' '-Wfatal-errors' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'


-- 
           Summary: [4.6 regression?] Behaviour change with pointers to
                    members
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: martin at mpa-garching dot mpg dot de
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44778