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object forbug {
val l1 = List(List(ValDef(new A)), List(ValDef(new A)))
for ((e1s, e2s) <- l1.zip(l1);
(e1, e2) <- e1s.zip(e2s)) {
e1.a.doSome(20)
// ()
}
}
class A {
def doSome(a: Int): this.type = {
println(a)
this
}
}
case class ValDef(a: A)
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