About executing a process synchronously

[javaddict]

I suddenly wondered how it is done in DCli since waitFor is deprecated. So I traced a little bit and found that the key is the use of Isolate and the blocking call Mailbox.take(). But why? Why not just use Process.runSync()?

[bsutton]

because calling runSync halts all async operations.

Which means that the calling process can't read the child stdout and stderr.

If the child stdout and stderr are not being read, once the child processes io buffers fill, the child process will hang.