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1 // check-pass
2 #![feature(optin_builtin_traits)]
3
4 auto trait NotSame {}
5
6 impl<A> !NotSame for (A, A) {}
7
8 trait OneOfEach {}
9
10 impl<A> OneOfEach for (A,) {}
11
12 impl<A, B> OneOfEach for (A, B)
13 where
14 (B,): OneOfEach,
15 (A, B): NotSame,
16 {
17 }
18
19 fn main() {}