1 // If the unstable API is the only possible solution,
2 // still emit E0658 "use of unstable library feature".
4 // aux-build:inference_unstable_iterator.rs
6 extern crate inference_unstable_iterator;
8 use inference_unstable_iterator::IpuIterator;
11 assert_eq!('x'.ipu_flatten(), 0); //~ ERROR E0658