1 files changed, 13 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence-projection-conflict-ty-param.rs b/src/test/ui/coherence/coherence-projection-conflict-ty-param.rs
new file mode 100644
index 000000000..3e4141fa8
--- /dev/null
+++ b/src/test/ui/coherence/coherence-projection-conflict-ty-param.rs
@@ -0,0 +1,13 @@
+// Coherence error results because we do not know whether `T: Foo<P>` or not
+// for the second impl.
+
+use std::marker::PhantomData;
+
+pub trait Foo<P> { fn foo() {} }
+
+impl <P, T: Foo<P>> Foo<P> for Option<T> {}
+
+impl<T, U> Foo<T> for Option<U> { }
+//~^ ERROR E0119
+
+fn main() {}