Message7439

The simplest test case it:
   new InteractiveConsole().interact();
Nothing executes until pressing ctrl-D.

It looks like the problem is caused by incorrectly stealing the code from java.nio.channels.Channels$ReadableByteChannelImpl.read().  This very critical bit is missing in 2.5.3's custom implementation:

if ((totalRead > 0) && !(in.available() > 0))
    break; // block at most once

Without this, it keeps making blocking reads until the buffer is full or the stream is closed.