Imported From: https://issues.scala-lang.org/browse/SI-8534?orig=1
Reporter: Igor Rumiha (igorrumiha)
Affected Versions: 2.10.3, 2.11.0
Attachments:

• compilerStacktrace.txt (created on Apr 24, 2014 9:57:48 PM UTC, 14812 bytes)

@adriaanm said:
The error message is correct. BugTest is not nested in MyTrait.

PS: I recommend putting the opening brace on the same line as the class definition, as in

trait MyTrait {
...

@adriaanm said:
This works:

trait MyTrait { type T; case class SomeData(x: T) }
class BugTest {
  def isTheBugHere(in: MyTrait#SomeData) = false
 }

Igor Rumiha (igorrumiha) said:
I know the code is not correct as it is, so an error message from the compiler is expected. Nevertheless, a large stack trace and a "You have slain the compiler" message seemed to be reason enough to report a bug.

@retronym said:
Crashiness was induced in scala/scala#2374 / v2.11.0-M3~16

@retronym said:

object line1 {
  trait MyTrait
}
object line2 {
  import line2._
  class BugTest {def isTheBugHere(in: MyTrait.this.type#SomeData) = false}
}

scalac-hash v2.11.0-M3~17 sandbox/test.scala
sandbox/test.scala:6: error: MyTrait is not an enclosing class
  class BugTest {def isTheBugHere(in: MyTrait.this.type#SomeData) = false}
                                      ^
one error found

% scalac-hash v2.11.0-M3~16 sandbox/test.scala
sandbox/test.scala:6: error: MyTrait is not an enclosing class
  class BugTest {def isTheBugHere(in: MyTrait.this.type#SomeData) = false}
                                      ^
uncaught exception during compilation: AssertionError("assertion failed: <error: value <error: <none>>>.this") @ scala.reflect.internal.Trees$SelectFromTypeTree.<init>(Trees.scala:502)
error: java.lang.AssertionError: assertion failed: <error: value <error: <none>>>.this
error:

@retronym said:
Assigning to Adriaan.

@adriaanm said:
Apologies, I didn't realize we were talking compiler crash.

@retronym said:
Reassinging to 2.11.5, 2.11.4 has already been released.

@retronym said:
scala/scala#4114