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error[E0308]: mismatched types
--> $DIR/issue-15783.rs:8:19
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LL | let msg = foo(x);
| --- ^ expected slice `[&str]`, found array `[&str; 1]`
| |
| arguments to this function are incorrect
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= note: expected enum `Option<&[&str]>`
found enum `Option<&[&str; 1]>`
note: function defined here
--> $DIR/issue-15783.rs:1:8
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LL | pub fn foo(params: Option<&[&str]>) -> usize {
| ^^^ -----------------------
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.
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