🚀 go-pugleaf

There is a bug in the function
	istream& operator >> (istream& s, Integer& y)
of the GNU g++ library libg++-2.0.
The following program gives a segmentation fault when fed with the input
	0 0
(SPARCstation 1, SunOS 4.1.1, g++ 2.1, libg++-2.0)
	#include <iostream.h>
	#include <Integer.h>

	main() {
		Integer a, b;
		cin >> a >> b;
		cout << "a = " << a << ", b = " << b << endl;
	}
Below is a context diff to fix the bug.

Ron Sommeling <Ron.Sommeling@cwi.nl>

*** Integer.cc.orig	Fri Mar  6 08:57:52 1992
--- Integer.cc	Thu Apr 16 13:10:50 1992
***************
*** 2326,2335 ****
        else
          break;
      }
!     else if (!know_base & !got_one && ch == '0')
!       base = 8;
!     else if (!know_base & !got_one && base == 8 && (ch == 'X' || ch == 'x'))
!       base = 16;
      else if (base == 8)
      {
        if (ch >= '0' && ch <= '7')
--- 2326,2337 ----
        else
          break;
      }
!     else if (!know_base & !got_one && ch == '0') {
!       base = 8; got_one = 2;
!     }
!     else if (gotone == 2 && (ch == 'X' || ch == 'x')) {
!       base = 16; got_one = 0; know_base = 1;
!     }
      else if (base == 8)
      {
        if (ch >= '0' && ch <= '7')