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/*
* @test /nodynamiccopyright/
* @summary Negative regression test from odersky
* @author odersky
*
* @compile/fail/ref=BadTest.out -XDrawDiagnostics BadTest.java
*/
class BadTest {
static class Main {
static <B> List<B> nil() { return new List<B>(); }
static <A> List<A> cons(A x, List<A> xs) { return xs.prepend(x); }
static <A> Cell<A> makeCell(A x) { return new Cell<A>(x); }
static <A> A id(A x) { return x; }
public static void main(String[] args) {
List<Cell<String>> as = nil().prepend(makeCell(null));
List<Cell<String>> bs = cons(makeCell(null), nil());
List<String> xs = id(nil());
List<String> ys = cons("abc", id(nil()));
List<String> zs = id(nil()).prepend("abc");
List<Cell<String>> us = id(nil()).prepend(makeCell(null));
List<Cell<String>> vs = cons(makeCell(null), id(nil()));
System.out.println(nil() instanceof List<String>);
nil();
}
}
}
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