permanently hidden warning in scala application

Question

I get the following warning whenever I start my Scala application:

WARN - imported `SVNProperties' is permanently hidden by definition of object SVNProperties in package core, at line 4 of app/core/SVNResource.scala

What could this mean?

Answer 1

You probably have code that looks something like this:

object Hidden {
  import scala.collection.immutable
  object immutable { def x = 7 }
}

except in a less obvious way. You're importing something--in my example, the package immutable--and then you go and define something else with the same name that prevents you from using what you imported.

In particular, it looks like you tried to import SVNProperties into SVNResource.scala, except that SVNResource.scala defines its own SVNProperties which hides the import.

Answer 2

I encountered this warning after moving some classes from one package to another. I guess there was some conflict between the new location and binaries from the old location. In my case this helped:

sbt clean