Interpolators defined in the REPL cause `ClassNotFoundException` about contextual HOT 6 CLOSED

@propensive
I can reproduce it with sbt
I guess it's a bug in macros.scala#getModule in Class.forName(s"$typeName$$")
My assumptions is: Class.forName(s"$typeName$$") tries to instantiate class in compile time. But interpolator wasn't compiled yet and JVM couldn't load the class

from contextual.

I think the class must be compiled then, because the method is being called from an instance of it, though it might be that it's a different classloader. Could you check whether the classloader that's being used in the macro (which doesn't find the class) is the same one as the one that's used if you call Class.forName in the REPL?

from contextual.

Same issue in ScalaFiddle: https://scalafiddle.io/sf/WOGG0M5/1

from contextual.

Thanks for the additional datapoint, @mkotsbak!

from contextual.

Thanks for the really clear example, @volth! I'll see if I can work out what's going on...

from contextual.

@volth: I think you need to compile Hello2.scala and hex.scala separately:
http://docs.scala-lang.org/overviews/macros/overview.html#using-macros-with-the-command-line-scala-compiler

So something like:

libs=$(dirname $(dirname $(readlink -f `which scala`)))/lib
classpath=/home/user/.m2/repository/com/propensive/contextual_2.11/1.0.1/contextual_2.11-1.0.1.jar:/home/user/.m2/repository/org/typelevel/macro-compat_2.11/1.1.1/macro-compat_2.11-1.1.1.jar:$libs/scala-compiler.jar:$libs/scala-reflect.jar
                  
scalac -d hex.jar \
  -Xplugin /home/user/.m2/repository/org/scalamacros/paradise_2.11.11/2.1.0/paradise_2.11.11-2.10..jar \
  -cp $classpath \
  contextual/examples/src/main/scala/contextual/examples/hex.scala

scalac -d zzz.jar \
  -Xplugin /home/user/.m2/repository/org/scalamacros/paradise_2.11.11/2.1.0/paradise_2.11.11-2.1.0.jar \
  -cp $classpath:hex.jar \
  Hello2.scala

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