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pub fn foo(params: Option<&[&str]>) -> usize {
params.unwrap().first().unwrap().len()
}
fn main() {
let name = "Foo";
let x = Some(&[name]);
let msg = foo(x);
//~^ ERROR mismatched types
//~| expected enum `std::option::Option<&[&str]>`
//~| found enum `std::option::Option<&[&str; 1]>`
//~| expected slice `[&str]`, found array `[&str; 1]`
assert_eq!(msg, 3);
}
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