[Bug c++/18366] New: Internal compiler error in lookup_template_function

[john dot pye at student dot unsw dot edu dot au]

Hello people :)

My dodgy syntax results in a compiler error. Error message follows, source code
shown at the end. Couldn't find any sign of this bug when I searched for it,
hopefully that's not because I did a bad search...



g++     test.cpp   -o test
test.cpp: In instantiation of `Size<1>':
test.cpp:34:   instantiated from here
test.cpp:14: internal compiler error: in lookup_template_function, at cp/pt.c:
   4005
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make: *** [test] Error 1



---------------8<---------------



#include <iostream>

/**
        SIZE CLASS
        
        When lengths are multiplied together, you get areas
        When area and length are multiplied together, you get volumes
        
        Can't add length to an area etc.
*/
template<int d1>
class Size{

        friend std::ostream& operator << <>(std::ostream &os,const Size &me);

        public:
                Size(double v){
                        this->v=v;
                }
                
                operator double(){
                        return v;
                }
                
                Size operator+(const Size& s) const{
                        return Size<d1>(this->v + s.v);
                }
                
        private:
                double v;
};

std::ostream& operator <<(std::ostream &os,const Size<1>& me){
        os<<me.v <<" m";
        return os;
}

std::ostream& operator <<(std::ostream &os,const Size<2>& me){
        os<<me.v <<" m²";
        return os;
}

std::ostream& operator <<(std::ostream &os,const Size<3>& me){
        os<<me.v <<" m³";
        return os;
}


/*
template<int d1,int d2>
Size<d1+d2>
Size<d1>::operator*(Size<d2> s){
        return Size<d1+d2>(this.v * s.v);
}
*/

typedef Size<1> Length;
typedef Size<2> Area;
typedef Size<3> Volume;

using namespace std;

int main(void){
        Length w=10;
        cout << "w = " << w << endl;
        
        Length d=20;
        cout << "d = " << d << endl;
        
        Area A=w*d;
        cout << "A = " << A << endl;
        
        Length causes_error = A + d;
        cout << "causes_error = " << causes_error << endl;
        
        Length h=5;
        
        cout << "h = " << h << endl;
        Volume V=A*h;
        cout << "V = " << V << endl;
        
}



----------------------8<--------------------


Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/specs
Configured with: /GCC/gcc-3.3.1-3/configure --with-gcc --with-gnu-ld
--with-gnu-as --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc
--libdir=/usr/lib --libexecdir=/usr/sbin --mandir=/usr/share/man
--infodir=/usr/share/info --enable-languages=c,ada,c++,f77,pascal,jav
a,objc --enable-libgcj --enable-threads=posix --with-system-zlib --enable-nls
--without-included-gettext --enable-interpreter --enable
-sjlj-exceptions --disable-version-specific-runtime-libs --enable-shared
--disable-win32-registry --enable-java-gc=boehm --disable-has
h-synchronization --verbose --target=i686-pc-cygwin --host=i686-pc-cygwin
--build=i686-pc-cygwin
Thread model: posix
gcc version 3.3.1 (cygming special)

-- 
           Summary: Internal compiler error in lookup_template_function
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: john dot pye at student dot unsw dot edu dot au
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18366