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error[E0308]: mismatched types
--> $DIR/wrong-ret-type.rs:2:49
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LL | fn mk_int() -> usize { let i: isize = 3; return i; }
| ----- ^ expected `usize`, found `isize`
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| expected `usize` because of return type
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help: you can convert an `isize` to a `usize` and panic if the converted value doesn't fit
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LL | fn mk_int() -> usize { let i: isize = 3; return i.try_into().unwrap(); }
| ++++++++++++++++++++
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.
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