migen/fhdl/bitcontainer: fix signed arrays (map is an iterator)

diff --git a/migen/fhdl/bitcontainer.py b/migen/fhdl/bitcontainer.py
index 345c9c54d518d24c97abd91fa520e467c32a0a85..5b1053604fdf40089e815fcaa47b0d9c566c69e5 100644 (file)
--- a/migen/fhdl/bitcontainer.py
+++ b/migen/fhdl/bitcontainer.py
@@ -93,7 +93,7 @@ def value_bits_sign(v):
        elif isinstance(v, f.Replicate):
                return (value_bits_sign(v.v)[0])*v.n, False
        elif isinstance(v, f._ArrayProxy):
-               bsc = map(value_bits_sign, v.choices)
+               bsc = list(map(value_bits_sign, v.choices))
                return max(bs[0] for bs in bsc), any(bs[1] for bs in bsc)
        else:
                raise TypeError("Can not calculate bit length of {} {}".format(