Error when fetching past end of Launches

[gschmidt]

Cursor is defined as non-nullable:

type LaunchConnection { # add this below the Query type as an additional type.
  cursor: String!
  hasMore: Boolean!
  launches: [Launch]!
}

But if no launches are retrieved (for example if you pass in a cursor for which hasMore was false), then the code will carefully return null for the cursor:

      return {
        launches,
        cursor: launches.length ? launches[launches.length - 1].cursor : null,

Resulting in INTERNAL_SERVER_ERROR: