message: comp proof tweak
diff: @@ -24,7 +24,8 @@ function UniformlyChunked<S>(label: string, initialChunk: number, f: UniformlyCh
  return 0 as any;
  }
  -const uniformPart = UniformlyChunked('Reading lines', 1000000, (size, state: { str: string, position: number, lines: string[] }) => {
  +type LineReaderState = { str: string, position: number, lines: string[] }
  +const uniformPart = UniformlyChunked('Reading lines', 1000000, (size, state: LineReaderState) => {
  state.position += size;
  state.lines.push('');
  return 0 /* number of lines read */;
  @@ -32,8 +33,7 @@ const uniformPart = UniformlyChunked('Reading lines', 1000000, (size, state: { s
  function readLines(str: string): Computation<string[]> {
  return create(async ctx => {
  - const state = { str, position: 0, lines: [] };
  - await uniformPart(ctx, state);
  + const state = (await uniformPart(ctx, { str, position: 0, lines: [] }));
  return state.lines;
  });
  }
  