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error[E0642]: patterns aren't allowed in methods without bodies
--> $DIR/issue-50571.rs:4:12
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LL | fn foo([a, b]: [i32; 2]) {}
| ^^^^^^
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help: give this argument a name or use an underscore to ignore it
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LL | fn foo(_: [i32; 2]) {}
| ~
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0642`.
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