NPE when a value class is assigned to a val inside async block

[ewiner]

It appears that if you use a value class inside an async block, the async macro will throw a NullPointerException while it's trying to initialize the state machine. When I run this code:

class IntWrapper(val value: String) extends AnyVal

async {
  val uid = new IntWrapper("foo")
  await(Future(uid))
}

I get this error:

java.lang.NullPointerException
    at #worksheet#.stateMachine$macro$1$1.<init>(TestCase.sc1225847898409493360.tmp:11)
    at #worksheet#.#worksheet#(TestCase.sc1225847898409493360.tmp:9)

[retronym]

Can you please try to reproduce this outside of the Scala worksheet to rule out that as a contributing factor? I can't reproduce it myself.

[ewiner]

Yes, I first hit the problem in my application code, then I screwed up trying to make a minimal repro. I updated the bug report, this now breaks in the REPL and as a compiled file.

[retronym]

What version of Scala-async and Scala are you using?

[ewiner]

Scala 2.11.1, scala-async 0.9.1

[retronym]

I had trouble reproducing it because it was already fixed in the snapshot version (both for 2.10 and 2.11). I've just committed a test case to back this up, and will release a new version of async tomorrow.

[ewiner]

Great, thanks.

[retronym]

I've just deployed scala-async 0.9.2 to Sonatype.

[retronym]

See: #91