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error[E0617]: can't pass a function item to a variadic function
--> $DIR/fn-item-diagnostic-issue-69232.rs:12:21
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LL | unsafe { foo(1, test) };
| ^^^^
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= help: a function item is zero-sized and needs to be cast into a function pointer to be used in FFI
= note: for more information on function items, visit https://doc.rust-lang.org/reference/types/function-item.html
help: use a function pointer instead
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LL | unsafe { foo(1, test as fn() -> u8) };
| +++++++++++++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0617`.
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