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Fix #8083: Add test case #8127

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Merged
merged 1 commit into from
Jan 29, 2020
Merged

Fix #8083: Add test case #8127

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26 changes: 26 additions & 0 deletions tests/pos/i8083.scala
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
trait A {
class B
}
abstract class Test2 { val a: A; val b: a.B }
object Test2 {
def unapply(that: Test2): Option[(that.a.type, that.a.B)] = Some((that.a, that.b))
}
object anA extends A
object Test extends App {
val t: Test2 { val a: anA.type; val b: anA.B } = new Test2 { val a: anA.type = anA; val b = new a.B }
t match {
case Test2(u, v) =>
u: A
u: t.a.type // error
v: t.a.B // error
}
}
object Test1 extends App {
object t extends Test2 { val a = anA; val b = new a.B }
t match {
case Test2(u, v) =>
u: A
u: t.a.type // error
v: t.a.B // error
}
}