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Compiler hangs when match returns different types #9018

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scabug opened this issue Nov 29, 2014 · 3 comments
Closed

Compiler hangs when match returns different types #9018

scabug opened this issue Nov 29, 2014 · 3 comments
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@retronym
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minimized patmat regression
Milestone
2.11.5

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@scabug
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scabug commented Nov 29, 2014

Works fine with scala 2.10.4

Minimized example:

object TestObject {

    def m(i: Int): AnyRef = i match {
        case 0 => new C()
        case 1 => Some(E.A).getOrElse("")
    }

    class C extends Ordered[C] {
        def compare(that: C): Int = ???
    }

    object E extends Enumeration {
        type E = Value
        val A = Value
    }
}

End of output when compiling with -verbose:

[typer in -1416506817514ms]
[loaded package loader util in -1416506818115ms]
[loaded class file C:\PROGRA~2\scala\bin\..\lib\scala-continuations-library_2.11-1.0.2.jar(scala/util/continuations/package.class) in -1416506818113ms]
[loaded package loader continuations in -1416506818111ms]
[loaded class file C:\PROGRA~2\scala\bin\..\lib\scala-continuations-library_2.11-1.0.2.jar(scala/util/continuations/cpsPlus.class) in -1416506818113ms]
[loaded class file C:\PROGRA~2\scala\bin\..\lib\scala-library.jar(scala/MatchError.class) in -1416506818114ms]
[loaded class file C:\Program Files (x86)\Java\jdk1.7.0_55\jre\lib\rt.jar(java/lang/RuntimeException.class) in -1416506818113ms]
[loaded class file C:\Program Files (x86)\Java\jdk1.7.0_55\jre\lib\rt.jar(java/lang/Exception.class) in -1416506818113ms]
@scabug
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scabug commented Nov 29, 2014

Imported From: https://issues.scala-lang.org/browse/SI-9018?orig=1
Reporter: Marek Gawlicki (marqxx)
Affected Versions: 2.11.4

@scabug
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scabug commented Dec 1, 2014

@retronym said:
Regressed in scala/scala@4412a92. I have a patch pending at https://github.com/retronym/scala/tree/ticket/9018

@scabug
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scabug commented Dec 1, 2014

@retronym said:
scala/scala#4178

@scabug scabug closed this as completed Dec 3, 2014
@scabug scabug added this to the 2.11.5 milestone Apr 7, 2017
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@retronym retronym

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minimized patmat regression
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