Do not ICE if some foreign expansions were not encoded.
Do not ICE if some foreign expansions were not encoded.

The metadata encoder does not necessarily encode all expansions, only
those which are referenced in other metadata fields.

aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust