Added the example "thin ice" from the extensions manual.

diff --git a/Modules/xxmodule.c b/Modules/xxmodule.c
index e21ba9c8eecc1d6137486c128bca628a733ffb14..465da68676bdabe18dd8ec080a7eca94d60e2bc9 100644 (file)
--- a/Modules/xxmodule.c
+++ b/Modules/xxmodule.c
@@ -185,12 +185,36 @@ xx_new(self, args)
        return (PyObject *)rv;
 }
 
+/* Example with subtle bug from extensions manual ("Thin Ice"). */
+
+static PyObject *
+xx_bug(self, args)
+    PyObject *self;
+    PyObject *args;
+{
+       PyObject *list, *item;
+       
+       if (!PyArg_ParseTuple(args, "O", &list))
+               return NULL;
+       
+       item = PyList_GetItem(list, 0);
+       /* Py_INCREF(item); */
+       PyList_SetItem(list, 1, PyInt_FromLong(0L));
+       PyObject_Print(item, stdout, 0);
+       printf("\n");
+       /* Py_DECREF(item); */
+       
+       Py_INCREF(Py_None);
+       return Py_None;
+}
+
 
 /* List of functions defined in the module */
 
 static PyMethodDef xx_methods[] = {
        {"foo",         xx_foo,         1},
        {"new",         xx_new,         1},
+       {"bug",         xx_bug,         1},
        {NULL,          NULL}           /* sentinel */
 };