Theano/Theano — pull request #1134 by lamblin (2012-12-12 23:23:57+00:00)
Title: Use other impl. of OrderedSet to prevent mem. leak

Previous implementation resulted in memory not being freed,
as exhibited in particular on theano/sandbox/cuda/tests/test_memory.py.

The version for older Python, as well as the new one, appear to work
correctly on that test.