src/test/ui/lazy-type-alias-impl-trait/branches.rs

   1 #![feature(type_alias_impl_trait)]
   2
   3 type Foo = impl std::fmt::Debug;
   4
   5 fn foo(b: bool) -> Foo {
   6     if b {
   7         vec![42_i32]
   8     } else {
   9         std::iter::empty().collect()
  10         //~^ ERROR `Foo` cannot be built from an iterator over elements of type `_`
  11     }
  12 }
  13
  14 fn main() {}