[pypy-dev] bug in flow graph?

Christian Tismer tismer at stackless.com
Wed Nov 24 16:04:19 CET 2004


Howdy,

I added testwise the md5 implementation to my app code
translator test cases.

It looks quite good, but there is a problem with
the flow space:
md5 unfortuantely uses copy.deepcopy, which makes
the flow space dig into that, and we crash with the message

AssertionError: Not generating the same operation sequence:
v4162 = simple_call((type type), v4157)
   ---> | while repeating we see here
        | v4163 = simple_call((builtin_function_or_method get), v4162)
v4163 = simple_call((builtin_function_or_method get), v4162)
v4164 = is_true(v4163)
>>>

I guess there is so much stuff in the copy module that the flow space
gets confused somehow. But well, it may be a real bug.

For now, I'll replace the copy.deepcopy part of md5 with something else,
to protect the analysis.

Might this be related to the fact, that copy.deepcopy also
does not work with the MD5 object, when I try it in the
pypy shell?

ciao - chris

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