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src/test/ui/borrowck/issue-55552-ascribe-wildcard-to-structured-pattern.rs
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// compile-pass | ||
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// rust-lang/rust#55552: The strategy pnkfelix landed in PR #55274 | ||
// (for ensuring that NLL respects user-provided lifetime annotations) | ||
// did not handle the case where the ascribed type has some expliit | ||
// wildcards (`_`) mixed in, and it caused an internal compiler error | ||
// (ICE). | ||
// | ||
// This test is just checking that we do not ICE when such things | ||
// occur. | ||
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struct X; | ||
struct Y; | ||
struct Z; | ||
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struct Pair { x: X, y: Y } | ||
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pub fn join<A, B, RA, RB>(oper_a: A, oper_b: B) -> (RA, RB) | ||
where A: FnOnce() -> RA + Send, | ||
B: FnOnce() -> RB + Send, | ||
RA: Send, | ||
RB: Send | ||
{ | ||
(oper_a(), oper_b()) | ||
} | ||
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fn main() { | ||
let ((_x, _y), _z): (_, Z) = join(|| (X, Y), || Z); | ||
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let (Pair { x: _x, y: _y }, Z): (_, Z) = join(|| Pair { x: X, y: Y }, || Z); | ||
} |