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Spurious scala.language.existentials warning triggered by isInstanceOf in LazyCombiner #7750

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scabug opened this issue Aug 14, 2013 · 4 comments
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Spurious scala.language.existentials warning triggered by isInstanceOf in LazyCombiner #7750

scabug opened this issue Aug 14, 2013 · 4 comments
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existential
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2.11.5

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@scabug
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scabug commented Aug 14, 2013

The line

if (other.isInstanceOf[LazyCombiner[_, _, _]]) {

triggers this warning:

    scala/src/library/scala/collection/parallel/mutable/LazyCombiner.scala:33:
    warning: the existential type
        scala.collection.parallel.mutable.LazyCombiner[_$1,_$2,_$3] forSome {
          type _$1; type _$2; type _$3 <: scala.collection.generic.Growable[_$1] with scala.collection.generic.Sizing },
    which cannot be expressed by wildcards, should be enabled by making the implicit value scala.language.existentials $
    if (other.isInstanceOf[LazyCombiner[_, _, _]]) {
                       ^

This diagnostic is false and should be fixed.
@scabug
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scabug commented Aug 14, 2013

Imported From: https://issues.scala-lang.org/browse/SI-7750?orig=1
Reporter: @soc
Affected Versions: 2.11.0-M5

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scabug commented Aug 5, 2014

@gkossakowski said:
The 2.11.2 is out so I'm rescheduling the issue for 2.11.3.

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scabug commented Nov 4, 2014

@retronym said:
Updating fix-by version to 2.11.5.

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scabug commented Nov 7, 2014

@retronym said:
scala/scala#4108

@scabug scabug closed this as completed Nov 10, 2014
@scabug scabug added this to the 2.11.5 milestone Apr 7, 2017
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