src/test/ui/impl-trait/issues/issue-83929-impl-trait-in-generic-default.rs

   1 struct Foo<T = impl Copy>(T);
   2 //~^ ERROR `impl Trait` not allowed outside of function and method return types
   3
   4 type Result<T, E = impl std::error::Error> = std::result::Result<T, E>;
   5 //~^ ERROR `impl Trait` not allowed outside of function and method return types
   6
   7 // should not cause ICE
   8 fn x() -> Foo {
   9     Foo(0)
  10 }
  11
  12 fn main() -> Result<()> {}