[Bug c++/56697] New: Erroneous rejection of use of private constructor in public method

[nmm1 at cam dot ac.uk]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56697

             Bug #: 56697
           Summary: Erroneous rejection of use of private constructor in
                    public method
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: nmm1@cam.ac.uk


What I believe is an erroneous rejection of a program.  Unfortunately, the
C++ standard is too contorted in this area for me to be absolutely sure,
Anyway, Intel is happy with it.

wheeler$cat junk.cpp
class weeble {
public:
    weeble () {}
    class wurble {
        int n;
        wurble (int k) : n(k) {}
    public:
        wurble () : n(0) {}
    };
    wurble fred (int k) {return wurble(k);}
};

int main () {
    weeble a;
    weeble::wurble b = a.fred(42);
}


wheeler$/home/nmm/GCC/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/home/nmm/GCC/bin/g++
COLLECT_LTO_WRAPPER=/home/nmm/GCC/libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.8-20130127/configure --prefix=/home/nmm/GCC
--disable-bootstrap --enable-checking=all --enable-languages=c,c++,fortran :
(reconfigured) ../gcc-4.8-20130127/configure --prefix=/home/nmm/GCC
--disable-bootstrap --enable-languages=c,c++,fortran
Thread model: posix
gcc version 4.8.0 20130127 (experimental) (GCC) 


wheeler$/home/nmm/GCC/bin/g++ junk.cpp
junk.cpp: In member function 'weeble::wurble weeble::fred(int)':
junk.cpp:6:9: error: 'weeble::wurble::wurble(int)' is private
         wurble (int k) : n(k) {}
         ^
junk.cpp:10:41: error: within this context
     wurble fred (int k) {return wurble(k);}
                                         ^