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error[E0308]: mismatched types
--> $DIR/universal-two-impl-traits.rs:5:9
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LL | fn foo(x: impl Debug, y: impl Debug) -> String {
| ---------- ---------- found type parameter
| |
| expected type parameter
LL | let mut a = x;
| - expected due to this value
LL | a = y;
| ^ expected type parameter `impl Debug`, found a different type parameter `impl Debug`
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= note: expected type parameter `impl Debug` (type parameter `impl Debug`)
found type parameter `impl Debug` (type parameter `impl Debug`)
= note: a type parameter was expected, but a different one was found; you might be missing a type parameter or trait bound
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0308`.
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