Dart VM hangs if script use class with parameters in it constructor inside Isolate

[DartBot]

This issue was originally filed by [email protected]

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What steps will reproduce the problem?

1. Paste code below into new dart script - test_isolate.dart:

import("dart:isolate");

class TestClass{
  String strField;
  TestClass(this.strField);
}

Future<String> someFunction(msg) {
  print('someFunction called with param $msg');
  Completer completer = new Completer();
  // Next line caused dart vm hangup.
  TestClass test = new TestClass('asdfadsf');
  
  completer.complete("some dummy data");
  return completer.future;
}

new_isolate() {
  port.receive((msg, reply) {
    Future f = someFunction(msg);
    f.then((r)=>reply.send(r));
  });
}

main() {
  spawnFunction(new_isolate).call("testMessage").then((s)=>print("result = $s"));
}

1. Invoke dart on script test_isolate.dart

What is the expected output?
>> someFunction called with param testMessage
>> result = some dummy data

What do you see instead?
 -- Dart process hangs up.

Another twist: Script works successfully with line
 -- TestClass test = new TestClass('asdfadsf');
modified to
 -- var test = new TestClass('asdfadsf');

What version of the product are you using? On what operating system?
Dart-sdk revision 7552
Windows 7 32bit.

[DartBot]

This comment was originally written by [email protected]

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On dart-sdk revision 7696 same results

[DartBot]

This comment was originally written by @financecoding

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On the Mac SDK
$ cat ~/Documents/DartEditor/dart/dart-sdk/revision
7708
This code executes without failing when test is var or TestCase. The code here https://gist.github.com/2740632 does fail.

[iposva-google]

Added Area-VM, Triaged labels.

[iposva-google]

There were a couple of fixes to isolate handling recently. Is this still an issue?

[DartBot]

This comment was originally written by [email protected]

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For me on dart-sdk revision 8121 (windows 7 32 bit) it works correctly now.

[turnidge]

It sounds like the recent isolate fixes corrected the problem. Closing the bug. Please reopen if the bug shows up again.

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Set owner to @turnidge.
Added CannotReproduce label.