java.lang.IllegalAccessError when matching refined type in App

[scabug]

scala> object Test extends App {
     |   def b= new AnyRef {
     |     def a= ()
     |   }
     |   b.a match { case _ => () }
     | }
defined module Test

scala> Test
java.lang.IllegalAccessError: tried to access field Test$.reflParams$Cache1 from class Test$delayedInit$body
	at Test$delayedInit$body.<clinit>(<console>:11)
	at Test$.<init>(<console>:7)
	at Test$.<clinit>(<console>)
	at .<init>(<console>:9)
	at .<clinit>(<console>)
	at .<init>(<console>:11)
	at .<clinit>(<console>)
	at $export(<console>)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:592)
	at scala.tools.nsc.interpreter.IMain$Request$$anonfun$10.apply(IMain.scala:828)
	at scala.tools.nsc.interpreter.Line$$anonfun$1.apply$mcV$sp(Line.scala:43)
	at scala.tools.nsc.io.package$$anon$2.run(package.scala:31)
	at java.lang.Thread.run(Thread.java:662)

The same exception is thrown if the code is compiled and run.

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-5134?orig=1
Reporter: @jsalvata
Assignee: @magarciaEPFL
Affected Versions: 2.9.0-1, 2.9.2, 2.10.4-RC1
See #5655
Attachments:

• test.tar (created on Jan 30, 2013 4:47:10 AM UTC, 10240 bytes)

[scabug]

@odersky said:
It is one of several bugs having to do with DelayedInit. We will attempt a redesign using macros aftre 2.10.0 is out. Delaying until then.

[scabug]

Michael Purcell (mpurcell) said (edited on Jan 30, 2013 4:48:24 AM UTC):
Note: This was performed using 2.10.0-20121205-235900-18481cef9b and scala-2.10.0-SNAPSHOT when built using sbt.

Good afternoon, let me preface my comment by saying that I am new to the scala language, so I apologize anything I post is in bad form.

Anyway, I have been encountering the same problem with implicit definitions that have default parameters as such:

object Main extends App {
implicit def byteArrayImplicits(self: Array[Byte]) = new {
def someDefinition(aParameter: String = "With a default value"): String = "With value of " + aParameter
}
val result = "bytes".getBytes.someDefinition()
println("The result is: " + result);
}

After invokation the program crashes with (full stack trace available in attachment):
java.lang.IllegalAccessError: tried to access field Main$.reflParams$Cache1 from class Main$delayedInit$body
at Main$delayedInit$body.(main.scala:6)
at Main$.(main.scala:1)
... etc ...

I have attached the full source used to reproduce this problem.

Thanks,
Mike.

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@adriaanm said:
Un-assigning to foster work stealing, as announced in https://groups.google.com/forum/?fromgroups=#!topic/scala-internals/o8WG4plpNkw

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@adriaanm said:
Unassigning and rescheduling to M6 as previous deadline was missed.

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@adriaanm said:
the original report is fixed in 2.11.0-M8 (and M7, and possibly earlier):

Welcome to Scala version 2.11.0-M8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_65).
Type in expressions to have them evaluated.
Type :help for more information.

scala> scala> object Test extends App {

// Detected repl transcript paste: ctrl-D to finish.

     |   def b= new AnyRef {
     |     def a= ()
     |   }
     |   b.a match { case _ => () }
     | }
defined module Test
 
scala> Test

// Replaying 2 commands from transcript.

scala> object Test extends App {
  def b= new AnyRef {
    def a= ()
  }
  b.a match { case _ => () }
}
warning: there were 1 feature warning(s); re-run with -feature for details
defined object Test

scala> Test
res0: Test.type = Test$@b08f1ce

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@retronym said:
Test case in scala/scala#3549. Assigning to Miguel to credit with the fix.