Variety of small INC/DECREF patches that fix reported memory leaks
with free variables. Thanks to Martin v. Loewis for finding two of
the problems. This fixes SF buf 405583.
There is also a C API change: PyFrame_New() is reverting to its
pre-2.1 signature. The change introduced by nested scopes was a
mistake. XXX Is this okay between beta releases?
cell_clear(), the GC helper, must decref its reference to break
cycles.
frame_dealloc() must dealloc all cell vars and free vars in addition
to locals.
eval_code2() setup code must INCREF cells it copies out of the
closure.
The STORE_DEREF opcode implementation must DECREF the object it passes
to PyCell_Set().
diff --git a/Objects/cellobject.c b/Objects/cellobject.c
index d9ecfd7..66fc8d1 100644
--- a/Objects/cellobject.c
+++ b/Objects/cellobject.c
@@ -83,6 +83,7 @@
static int
cell_clear(PyCellObject *op)
{
+ Py_XDECREF(op->ob_ref);
op->ob_ref = NULL;
return 0;
}