Over-ride pyset in PyTuple so our tuples go back to being immutable. …

…Fixes

http://bugs.jython.org/issue1242.

Lib/test/test_tuple.py

@@ -88,6 +88,12 @@ def test_repr(self):
         self.assertEqual(repr(a0), "()")
         self.assertEqual(repr(a2), "(0, 1, 2)")
 
+    def test_setitem(self):
+        #This test is equivalent to (1,2)[0] = 0 which was briefly broken in
+        #Jython 2.5b2
+        import operator
+        self.assertRaises(TypeError, operator.setitem, (1,2), 0, 0)
+
 def test_main():
     test_support.run_unittest(TupleTest)
 

src/org/python/core/PyTuple.java

@@ -384,4 +384,9 @@ protected String unsupportedopMessage(String op, PyObject o2) {
         }
         return super.unsupportedopMessage(op, o2);
     }
+
+    public void pyset(int index, PyObject value) {
+        throw Py.TypeError("'tuple' object does not support item assignment");
+    }
+
 }