Stream decoders silently accept incomplete final records #299

decodeArrayStream() and decodeMultiStream() finish successfully when input ends partway through the last record. The caller receives only the preceding records, although both APIs document a RangeError for incomplete data.

import { encode, decodeArrayStream } from '@msgpack/msgpack'

const bytes = encode([{ id: 1 }, { id: 2 }])
async function* input() {
  yield bytes.subarray(0, bytes.length - 1)
}

const items = []
for await (const item of decodeArrayStream(input())) items.push(item)
console.log(items) // [{ id: 1 }], with no error

Expected: iteration rejects with RangeError when the stream ends. The same issue occurs with concatenated records passed to decodeMultiStream(), and when an array declares another item but contains no bytes for it.