Evolution of Rust Compiler Errors

    io fn starve_main(chan[int] alive) {
      log "signalling main";
      alive <| 1;
      log "starving main";
      let int i = 0;
      while (true) {
        i += 1;
      }
    }

`io fn`, there were three effects: io, state, and unsafe. There was also pure, for functions with no effect.

chan for channels. <| was a "semi-synchronous message send," it blocked if the queue was full.

square brackets for generics

int was two's compliment signed integer with machine dependent size

log for printing to the screen