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error[E0308]: mismatched types
--> $DIR/issue-20862.rs:2:5
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LL | fn foo(x: i32) {
| - help: a return type might be missing here: `-> _`
LL | |y| x + y
| ^^^^^^^^^ expected `()`, found closure
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= note: expected unit type `()`
found closure `[closure@$DIR/issue-20862.rs:2:5: 2:8]`
error[E0618]: expected function, found `()`
--> $DIR/issue-20862.rs:7:13
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LL | fn foo(x: i32) {
| -------------- `foo` defined here returns `()`
...
LL | let x = foo(5)(2);
| ^^^^^^---
| |
| call expression requires function
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0308, E0618.
For more information about an error, try `rustc --explain E0308`.
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