Index: org/python/core/PyLong.java
===================================================================
RCS file: /cvsroot/jython/jython/org/python/core/PyLong.java,v
retrieving revision 2.16
diff -c -r2.16 PyLong.java
*** org/python/core/PyLong.java	31 Oct 2002 19:43:37 -0000	2.16
--- org/python/core/PyLong.java	20 Dec 2002 18:59:59 -0000
***************
*** 339,351 ****
      public PyObject __lshift__(PyObject right) {
          if (!canCoerce(right))
              return null;
!         return new PyLong(value.shiftLeft(coerceInt(right)));
      }
  
      public PyObject __rshift__(PyObject right) {
          if (!canCoerce(right))
              return null;
!         return new PyLong(value.shiftRight(coerceInt(right)));
      }
  
      public PyObject __and__(PyObject right) {
--- 339,357 ----
      public PyObject __lshift__(PyObject right) {
          if (!canCoerce(right))
              return null;
!         int rightv = coerceInt(right);
!         if(rightv < 0)
!             throw Py.ValueError("negative shift count");
!         return new PyLong(value.shiftLeft(rightv));
      }
  
      public PyObject __rshift__(PyObject right) {
          if (!canCoerce(right))
              return null;
!         int rightv = coerceInt(right);
!         if(rightv < 0)
!             throw Py.ValueError("negative shift count");
!         return new PyLong(value.shiftRight(rightv));
      }
  
      public PyObject __and__(PyObject right) {