New issue 2429: cPickle issue with revdb
https://bitbucket.org/pypy/pypy/issues/2429/cpickle-issue-with-revdb
Tristan Seligmann:
Minimal reproduction:
```
import cPickle
import pickle
class Cls(object):
def __init__(self):
self.plugins = []
obj = {'key': Cls()}
pickle.dumps(obj) # This works
cPickle.dumps(obj) # This does not
```
produces the following traceback:
```
Traceback (most recent call last):
File "picklebug.py", line 10, in <module>
cPickle.dumps(obj) # This does not
File "/home/mithrandi/code/pypy/lib_pypy/cPickle.py", line 124, in dumps
Pickler(file, protocol).dump(obj)
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 224, in dump
self.save(obj)
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 286, in save
f(self, obj) # Call unbound method with explicit self
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 653, in
save_dict
self._batch_setitems(obj.iteritems())
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 667, in
_batch_setitems
save(v)
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 331, in save
self.save_reduce(obj=obj, *rv)
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 401, in
save_reduce
save(args)
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 286, in save
f(self, obj) # Call unbound method with explicit self
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 562, in
save_tuple
save(element)
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 286, in save
f(self, obj) # Call unbound method with explicit self
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 812, in
save_global
self.memoize(obj)
File "/home/mithrandi/code/pypy/lib_pypy/cPickle.py", line 112, in memoize
return PythonPickler.memoize(self, obj)
File "/home/mithrandi/code/pypy/lib-python/2.7/pickle.py", line 244, in
memoize
assert id(obj) not in self.memo
AssertionError
```
My pypy-revdb was built from a740348ea339 on the reverse-debugger branch;
regular pypy 5.4.1 doesn't seem to have the same bug.
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