fn foo2(_: &dyn (Drop + AsRef<str>)) {} //~ ERROR incorrect braces around trait bounds
+fn foo2_no_space(_: &dyn(Drop + AsRef<str>)) {} //~ ERROR incorrect braces around trait bounds
+
fn foo3(_: &dyn {Drop + AsRef<str>}) {} //~ ERROR expected parameter name, found `{`
//~^ ERROR expected one of `!`, `(`, `)`, `*`, `,`, `?`, `for`, `~`, lifetime, or path, found `{`
//~| ERROR at least one trait is required for an object type