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$ cargo run
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Compiling functions v0.1.0 (file:///projects/functions)
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error: expected expression, found `let` statement
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--> src/main.rs:2:14
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2 | let x = (let y = 6);
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| ^^^
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= note: only supported directly in conditions of `if` and `while` expressions
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warning: unnecessary parentheses around assigned value
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--> src/main.rs:2:13
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2 | let x = (let y = 6);
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| ^ ^
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= note: `#[warn(unused_parens)]` on by default
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help: remove these parentheses
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2 - let x = (let y = 6);
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2 + let x = let y = 6;
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warning: `functions` (bin "functions") generated 1 warning
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error: could not compile `functions` (bin "functions") due to 1 previous error; 1 warning emitted
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