`Enum` assignment fails on list of enums

[rafa-be]

Assigning an Enum with its value fails when the enum is declared within a List:

Schema:

enum Status {
  active @0;
  inactive @1;
  pending @2;
}

struct Container {
    statuses @0 :List(Status);
}

When running this Python code (PyCapnp v2.0.0):

msg = Container()

msg.init("statuses", 1)
msg.statuses[0] = Status.active

This exception gets raised:

KjException: capnp/dynamic.c++:1827: failed: expected reader.type == ENUM [4 == 9]; Value type mismatch.

However, assigning a string value works as expected:

msg.statuses[0] = "active"

This behavior is odd, as assigning an Enum that is not declared within a List works perfectly:

Schema:

struct Container {
    status @0 :Status;
}

Python code:

msg = Container()
msg.status = Status.active