File: issue-117965.rs

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rustc 1.87.0%2Bdfsg1-1
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#![deny(single_use_lifetimes)]

pub enum Data<'a> {
    Borrowed(&'a str),
    Owned(String),
}

impl<'a> Data<'a> {
    pub fn get<'b: 'a>(&'b self) -> &'a str {
        //~^ ERROR lifetime parameter `'b` only used once
        match &self {
            Self::Borrowed(val) => val,
            Self::Owned(val) => &val,
        }
    }
}

fn main() {}