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sir-wabbit opened this issue Apr 25, 2018 · 2 comments
Closed

StackOverflow in TypeApplications #4371

sir-wabbit opened this issue Apr 25, 2018 · 2 comments
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area:typer itype:bug

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@sir-wabbit
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sir-wabbit commented Apr 25, 2018 •
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Probably related to #4368, but stack trace is different.

object App {
  class Foo { type A = Boo#B }
  class Boo { type B = Foo#A }
}
Exception in thread "main" java.lang.StackOverflowError
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:173)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:192)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:178)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:192)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:178)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:192)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:178)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:192)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:178)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:192)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:178)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:192)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:178)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
	at dotty.tools.dotc.core.TypeApplications$.typeParams$extension(TypeApplications.scala:171)
	at dotty.tools.dotc.core.TypeApplications$.$anonfun$typeParams$extension$1(TypeApplications.scala:192)
	at dotty.tools.dotc.util.Stats$.track(Stats.scala:35)
.........
@sir-wabbit
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Completely different snippet, but same error:

object App {
  type T[G[X] <: X, F[X] <: G[F[X]]]
}

@odersky odersky mentioned this issue Apr 27, 2018
Merged
nicolasstucki added a commit to dotty-staging/dotty that referenced this issue Jan 18, 2019
@nicolasstucki
Fix scala#4371: Add regression test
84ffc92
@nicolasstucki
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This only happens on bootstrapped

liufengyun added a commit that referenced this issue Feb 5, 2019
@liufengyun
Merge pull request #5850 from dotty-staging/fix-#4371-2
42f96b4 
Fix #4371: Add regression tests
@nicolasstucki nicolasstucki mentioned this issue Feb 6, 2019
Closed
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@smarter @Blaisorblade @sir-wabbit @nicolasstucki