Try to make weakref4 more robust

test/tests/weakref4.py

@@ -7,14 +7,13 @@ def doStuff():
   wr = weakref.ref(meth)
   return wr
 
-def fact(n):
-    if n <= 1:
-        return n
-    return n * fact(n-1)
+def recurse(f, n):
+    if n:
+        return recurse(f, n-1)
+    return f()
 
 
-w = doStuff()
-print fact(10) # try to clear some memory
+w = recurse(doStuff, 100)
 
 # Try creating a large object to make sure we can handle them:
 def f():
@@ -24,7 +23,7 @@ def f():
     return weakref.ref(C)
 
 
-r = f()
+r = recurse(f, 100)
 
 import gc
 gc.collect()