error[E0034]: multiple applicable items in scope --> $DIR/inference_unstable_featured.rs:16:20 | LL | assert_eq!('x'.ipu_flatten(), 0); | ^^^^^^^^^^^ multiple `ipu_flatten` found | = note: candidate #1 is defined in an impl of the trait `IpuIterator` for the type `char` = note: candidate #2 is defined in an impl of the trait `IpuItertools` for the type `char` help: disambiguate the associated function for candidate #1 | LL | assert_eq!(IpuIterator::ipu_flatten(&'x'), 0); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ help: disambiguate the associated function for candidate #2 | LL | assert_eq!(IpuItertools::ipu_flatten(&'x'), 0); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: aborting due to previous error For more information about this error, try `rustc --explain E0034`.