Data returned from Process is not sent to output stream for java -version command

[DartBot]

This issue was originally filed by [email protected]

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What steps will reproduce the problem?

1. Used a modified version of the example provided in issue155 (http://code.google.com/p/dart/issues/detail?id=155)

void main() {
  int BUF_LEN = 50;
  List<int> out = new List<int>();
  List<int> err = new List<int>();

  //Process p = new Process('ping', ['-c', '2', 'google.com']);// this works
  Process p = new Process('java', ['-version']);
  p.setExitHandler((int status) {
      print('exit($status)');
      print('OUT: -------------');
      print(new String.fromCharCodes(out));
      print('ERR: -------------');
      print(new String.fromCharCodes(err));
      p.close();
    });

  p.start();
  read(false, new List(BUF_LEN), p.stdoutStream, out);
  read(false, new List(BUF_LEN), p.stderrStream, err);
}

void processBuf(List<int> l, List<int> data) {
  data.addAll(l);
}

void read(bool fromCallback, List<int> buf, InputStream i, List<int> data) {
  if (fromCallback) {
    data.addAll(buf);
  }
  while(i.read(buf, 0, buf.length, () => read(true, buf, i, data))) {
    data.addAll(buf);
  }
}

What is the expected output? What do you see instead?
Actual output:

dart@dartvm~/dart: ./dart processtest.dart
exit(0)
OUT: -------------

ERR: -------------
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03-384-10M3425)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-384, mixed

Expected output:
The output is sent to the error stream instead of output stream.

What version of the product are you using? On what operating system?
Max OSX 10.6.8

Please provide any additional information below.
If you uncomment the code that executes the ping command in a similar fashion, which works as expected, but java -version is exhibiting a different behavior. Am I missing anything here?

[DartBot]

This comment was originally written by [email protected]

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Added Area-VM, OpSys-OSX, Triaged labels.

[iposva-google]

This behaves as expected since "java -version" does print the version on stderr. See below when launching it from a bash shell.

$ java -version 1>stdout.txt 2>stderr.txt
$ cat stdout.txt
$ cat stderr.txt
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03-384-10M3425)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-384, mixed mode)
$

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Added Invalid label.

[DartBot]

This comment was originally written by [email protected]

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Ah, I did not expect java to redirect to stderr. thanks for catching that!

I was curious to run this program on Windows, but it failed with the following error and the program hangs, sounds like a totally different problem though.

C:\dart>dart_bin.exe processtest.dart
An unhandled exception has been thrown
SocketIOException: Error: readList failed - invalid socket handle
 0. Function: '[email protected]' url: './dart:builtin-lib' line:1160 col:5
 1. Function: 'SocketInputStream.read' url: './dart:builtin-lib' line:1260 col:27
 2. Function: 'read' url: 'processtest.dart' line:30 col:15
 3. Function: 'main' url: 'processtest.dart' line:18 col:7

C:\dart>
Pinging google.com [74.125.127.104] with 32 bytes of data:
Reply from 74.125.127.104: bytes=32 time=44ms TTL=46
Reply from 74.125.127.104: bytes=32 time=44ms TTL=46
Reply from 74.125.127.104: bytes=32 time=44ms TTL=46
Reply from 74.125.127.104: bytes=32 time=43ms TTL=46

Ping statistics for 74.125.127.104:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 43ms, Maximum = 44ms, Average = 43ms