1error[E0119]: conflicting implementations of trait `Unpin` for type `Foo<MyPhantomPinned, ()>` 2 --> tests/ui/unstable-features/negative_impls.rs:8:1 3 | 48 | #[pin_project::pin_project] 5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `Foo<MyPhantomPinned, ()>` 6... 717 | impl Unpin for Foo<MyPhantomPinned, ()> {} 8 | --------------------------------------- first implementation here 9 | 10 = note: this error originates in the derive macro `::pin_project::__private::__PinProjectInternalDerive` (in Nightly builds, run with -Z macro-backtrace for more info) 11