Author: Armin Rigo <ar...@tunes.org>
Branch:
Changeset: r1281:ec0b6e951f55
Date: 2013-07-18 18:25 +0200
http://bitbucket.org/cffi/cffi/changeset/ec0b6e951f55/
Log: Add the (now-passing) test from issue #92
diff --git a/testing/test_function.py b/testing/test_function.py
--- a/testing/test_function.py
+++ b/testing/test_function.py
@@ -381,3 +381,24 @@
sin100 = my_decorator(m.sin)
x = sin100(1.23)
assert x == math.sin(1.23) + 100
+
+ def test_free_callback_cycle(self):
+ import weakref
+ def make_callback(data):
+ container = [data]
+ callback = ffi.callback('int()', lambda: len(container))
+ container.append(callback)
+ # Ref cycle: callback -> lambda (closure) -> container -> callback
+ return callback
+
+ class Data(object):
+ pass
+ ffi = FFI(backend=self.Backend())
+ data = Data()
+ callback = make_callback(data)
+ wr = weakref.ref(data)
+ del callback, data
+ for i in range(3):
+ if wr() is not None:
+ import gc; gc.collect()
+ assert wr() is None # 'data' does not leak
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