This PR fixes conversion of some Independent() distributions to/from Funsors. In #491 we changed funsor.tensor.stack from a funsor.Function to an Op, breaking some pattern-matching logic in funsor.to_funsor for distributions (see e.g. eager_beta). This PR fixes that regression and reinstates the failing test cases in test_distribution_generic.py that were removed in #491.
Unblocks https://github.com/pyro-ppl/pyro/pull/2786
This PR fixes conversion of some
Independent()distributions to/from Funsors. In #491 we changedfunsor.tensor.stackfrom afunsor.Functionto anOp, breaking some pattern-matching logic infunsor.to_funsorfor distributions (see e.g.eager_beta). This PR fixes that regression and reinstates the failing test cases intest_distribution_generic.pythat were removed in #491.