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error: constant of non-structural type `S` in a pattern
--> $DIR/match_ice.rs:11:9
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LL | struct S;
| -------- `S` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
...
LL | const C: &S = &S;
| ----------- constant defined here
LL | match C {
LL | C => {}
| ^ constant of non-structural type
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= note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details
error: aborting due to 1 previous error
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