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trait X {
    type Y<'a>;
}

const _: () = {
  fn f1<'a>(arg : Box<dyn X< : 32 >>) {}
      //~^ ERROR: expected one of `>`, a const expression, lifetime, or type, found `:`
      //~| ERROR: expected parameter name, found `>`
      //~| ERROR: expected one of `!`, `)`, `+`, `,`, or `::`, found `>`
      //~| ERROR: constant provided when a type was expected
};

const _: () = {
  fn f1<'a>(arg : Box<dyn X< = 32 >>) {}
      //~^ ERROR: expected one of `>`, a const expression, lifetime, or type, found `=`
};

fn main() {}