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Type mismatch on second compilation #7543

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scabug opened this issue May 31, 2013 · 3 comments
Closed

Type mismatch on second compilation #7543

scabug opened this issue May 31, 2013 · 3 comments
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@scabug
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scabug commented May 31, 2013

Create file:

// core/package.scala
package test

package object core {

  sealed trait Result[T]
  case class Success[T](data: T) extends Result[T]
  case class Failure[T](errorText: String) extends Result[T]

  def f(): Result[Int] = {
    Success[Int](2): Result[Int]
  }
}

Now compile it:

  $ ~/dev/scala-2.10.1/bin/scalac core/package.scala

all is OK. Compile it again:

  $ ~/dev/scala-2.10.1/bin/scalac core/package.scala
  core/package.scala:10: error: type mismatch;
   found   : test.core.Success[Int]
   required: test.core.package.Result[Int]
      Success[Int](2): Result[Int]
                ^
  one error found
@scabug
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scabug commented May 31, 2013

Imported From: https://issues.scala-lang.org/browse/SI-7543?orig=1
Reporter: Mikhail Trishchenkov (kriomant)
Affected Versions: 2.10.1, 2.10.2-RC1
See #5954

@scabug
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scabug commented May 31, 2013

@retronym said (edited on May 31, 2013 3:47:16 PM UTC):
Sounds very similar to #5954. Creating classes in package objects is not recommended.

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scabug commented May 31, 2013

@paulp said:
Especially case classes.

@scabug scabug closed this as completed May 31, 2013
@scabug scabug mentioned this issue Apr 7, 2017
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