TypeId is sometimes not consistent across crates

[Meyermagic]

See: https://gist.github.com/Meyermagic/10636908 (where the underscores in the filenames represent forward slashes / subdirectories)

With Foo as an enum, the TypeId differs in each crate. With a simple struct, the TypeIds match.

[Meyermagic]

This causes AnyOwnExt's "move" and AnyRefExt's "is" to fail when used with some types from other crates / prevents the safe extraction of the underlying type of trait objects.