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Sometimes @tailrec does not compile #6479

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scabug opened this issue Oct 5, 2012 · 2 comments
Closed

Sometimes @tailrec does not compile #6479

scabug opened this issue Oct 5, 2012 · 2 comments

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@scabug
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@scabug scabug commented Oct 5, 2012

Works for 2.9.1, 2.9.2 and 2.10.0-M2. Does not work for 2.10.0-M7.

object TailrecAfterTryCatch {

  @annotation.tailrec
  final def good1() {
    1 match {
      case 2 => {
        try {
        //  return
        } catch {
          case e: ClassNotFoundException =>
        }
        good1()
      }
    }
  }

  @annotation.tailrec
  final def good2() {
    //1 match {
    //  case 2 => {
        try {
          return
        } catch {
          case e: ClassNotFoundException =>
        }
        good2()
    //  }
    //}
  }

  @annotation.tailrec
  final def good3() {
    val 1 = 2
    try {
      return
    } catch {
      case e: ClassNotFoundException =>
    }
    good3()
  }

  @annotation.tailrec
  final def bad() {
    1 match {
      case 2 => {
        try {
          return
        } catch {
          case e: ClassNotFoundException =>
        }
        bad()
      }
    }
  }

}
@scabug

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@scabug scabug commented Oct 5, 2012

Imported From: https://issues.scala-lang.org/browse/SI-6479?orig=1
Reporter: @Atry
Affected Versions: 2.10.0-M7

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@scabug scabug commented Jan 13, 2013

@retronym said:
Not really a pattern matcher bug, but rather an existing issue in Uncurry with label jumps:

scala/scala#1892

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