1 files changed, 21 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-26905-rpass.rs b/tests/ui/issues/issue-26905-rpass.rs
new file mode 100644
index 000000000..2d5827f47
--- /dev/null
+++ b/tests/ui/issues/issue-26905-rpass.rs
@@ -0,0 +1,21 @@
+// run-pass
+#![feature(unsize, coerce_unsized)]
+
+// Verfies that PhantomData is ignored for DST coercions
+
+use std::marker::{Unsize, PhantomData};
+use std::ops::CoerceUnsized;
+
+struct MyRc<T: ?Sized> {
+    _ptr: *const T,
+    _boo: PhantomData<T>,
+}
+
+impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<MyRc<U>> for MyRc<T>{ }
+
+fn main() {
+    let data = [1, 2, 3];
+    let iter = data.iter();
+    let x = MyRc { _ptr: &iter, _boo: PhantomData };
+    let _y: MyRc<dyn Iterator<Item=&u32>> = x;
+}