c++/1927: internal compiler error 980711

[gilles56 at escape dot ca]

>Number:         1927
>Category:       c++
>Synopsis:       internal compiler error 980711
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Sat Feb 10 10:56:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     gilles56@escape.ca
>Release:        egcs 1.1.2 GCC 2.91.66
>Organization:
>Environment:
Linux 6.0 OS
>Description:
internal compiler error 980711
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="full_grading.txt"
Content-Disposition: inline; filename="full_grading.txt"

the following program has 7 parts: median.h, median.cc; grade.h, grade.cc;
Student_info.h, Student_info.cc; and the main function: 4_grading.cc.  

I received an internal error 980711 with version egcs 2.91.66 with command:
g++ -o 4_grading median.cc Student_info.cc grade.cc 4_grading.cc
////////////////////////////////////////////////////////////

#ifndef GUARD_median_h
#define GUARD_median_h

//median.h
#include <vector>
 
double median(std::vector<double>);

#endif

//////////////////////////////////////////////////////////
//median.cc
#include <algorithm> //for declaration of sort
#include <stdexcept> //for declaration of domain_error
#include <vector>    //for kdeclaration of vector
#include "median.h"

using std::domain_error; using std::sort; using std::vector;

//compute the median of a vector<double>
double median(vector<double> vec)
{
   typedef vector<double>::size_type vec_sz;
   
   vec_sz size = vec.size();
   if(size == 0 )
     throw domain_error("median of an empty vector");
   sort(vec.begin(), vec.end());
   vec_sz mid = size/2;
   return size % 2 == 0 ? (vec[mid] + vec[mid-1]) / 2 : vec[mid]; 
}

/////////////////////////////////////////////////////////////

#ifndef GUARD_grade_h
#define GUARD_grade_h

//grade.h
#include <vector>
#include "Student_info.h"

double grade(double, double, double);
double grade(double, double, const std::vector<double>&);
double grade(const Student_info&);  //requires Student_info.h

#endif

//////////////////////////////////////////////////////////

//grade.cc
#include <stdexcept>
#include <vector>
#include "grade.h"
#include "median.h"
#include "Student_info.h"

using std::domain_error;  using std::vector;

double grade(double midterm, double final, double homework)
{
   return 0.2 * midterm + 0.4 * final + 0.4 * homework;
}

double grade(double midterm, double final, const vector<double>& hw)
{
   if(hw.size == 0)
      throw domain_error("student has done no homework");
   return grade(midterm, final, median(hw)); 
}

double grade(const Student_info& s)
{
   return grade(s.midterm, s.final, s.homework);
}

/////////////////////////////////////////////////////////

#ifndef GUARD_Student_info
#define GUARD_Student_info

//Student_info.h
#include <iostream>
#include <string>
#include <vector>

struct Student_info (
    std::string name;
    double midterm, final;
    std::vector<double> homework;
};

bool compare(const Student_info&, const Student_info&);
std::istream& read(std::istream&, Student_info&);
std::istream& read_hw(std::istream&, std::vector<double>&);
#endif

//////////////////////////////////////////////////

//Student_info.cc
#include "Student_info.h"

using std::istream; using std::vector;

bool compare(const Student_info& x, const Student_info& y)
{
   return x.name < y.name;
}

istream& read(istream& is, Student_info& s)
{
   is >> s.name >> s.midterm >> s.final;
   read_hw(is, s.homework);  //homework from grade function
   return is;
}

istream& read_hw(istream& in, vector<double>& hw)
{
   if(in) {
      
      hw.clear();

      double x;
      while(in >> x)
            hw.push_back(x);
 
      in.clear();
   }
   return in;
} 

////////////////////////////////////////////////////////////

//main function
//4_grading.cc      

#include <algorithm>
#include <iostream>
#include <iosfwd>
#include <iomanip>
#include <stdexcept>
#include <string>
#include <vector>
#include "grade.h"
#include "Student_info.h"

using std::cin;            using std::sort;
using std::cout;           using std::streamsize;
using std::domain_error;   using std::string;
using std::endl;           using std::vector;
 using std::max;           using std::setw; 
using std::setprecision;   
         
int main()
{
   vector<Student_info> students;
   Student_info record;
   string::size_type maxlen = 0;

   while(read(cin,record))  {
        maxlen = max(maxlen, record.name.size());
        students.push_back(record);
   }

   sort(students.begin(), students.end(), compare);   

   for(vector<Student_info>::size_type i = 0;
       i != students.size(); ++i)  {
      
      cout << setw(maxlen+1) << students[i].name;

      try {
          double final_grade = grade(students[i]);
          streamsize prec = cout.precision();
          cout << setprecision(3) << final_grade
               << setprecision(prec);
      } catch (domain_error e)  {
         cout << e.what();
      }
      cout << endl;
   }
   return 0;
}