1 const F: &'static dyn PartialEq<u32> = &7u32; 2 main()3 fn main() { 4 let a: &dyn PartialEq<u32> = &7u32; 5 match a { 6 F => panic!(), //~ ERROR: `&dyn PartialEq<u32>` cannot be used in patterns 7 } 8 } 9