File: unknown-when-ptr-metadata-is-DST.rs

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#![feature(ptr_metadata)]
#![feature(trivial_bounds)]

fn return_str()
where
    str: std::ptr::Pointee<Metadata = str>,
{
    [(); { let _a: Option<&str> = None; 0 }];
    //~^ ERROR evaluation of constant value failed
}

fn main() {}