Migrated from http://lampsvn.epfl.ch/trac/scala/ticket/2931
Reporter ijuma
Steps to reproduce:
(1) Create two files:
src/test/BarFile.scala

package test

import test2.BarFile

object Bar {
  def main(args: Array[String]) {
    
  }
}

src/test2/BarFile.scala

package test2

class BarFile {

}

(2) Do clean build
(3) Notice error in problems view "Bar is already defined as object Bar". Also, no classfiles are compiled.
(4) Edit and save test/BarFile.scala
(5) Notice that classfiles are generated and the problems view shows no errors
Of course, in my environment the second BarFile was not in the same project (it was in a jar). Strangely, renaming test/BarFile.scala to test/Bar.scala fixes the problem.

[ijuma@mac]% /opt/scala-2.8.0.Beta1-RC8/bin/fsc test/BarFile.scala test2/BarFile.scala
[ijuma@mac]%