1 files changed, 42 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/associated-types-eq-3.rs b/src/test/ui/associated-types/associated-types-eq-3.rs
new file mode 100644
index 000000000..f6988dcf6
--- /dev/null
+++ b/src/test/ui/associated-types/associated-types-eq-3.rs
@@ -0,0 +1,42 @@
+// Test equality constraints on associated types. Check we get type errors
+// where we should.
+
+pub trait Foo {
+    type A;
+    fn boo(&self) -> <Self as Foo>::A;
+}
+
+struct Bar;
+
+impl Foo for isize {
+    type A = usize;
+    fn boo(&self) -> usize {
+        42
+    }
+}
+
+fn foo1<I: Foo<A=Bar>>(x: I) {
+    let _: Bar = x.boo();
+}
+
+fn foo2<I: Foo>(x: I) {
+    let _: Bar = x.boo();
+    //~^ ERROR mismatched types
+    //~| found associated type `<I as Foo>::A`
+    //~| expected struct `Bar`, found associated type
+    //~| expected struct `Bar`
+}
+
+
+pub fn baz(x: &dyn Foo<A=Bar>) {
+    let _: Bar = x.boo();
+}
+
+
+pub fn main() {
+    let a = 42;
+    foo1(a);
+    //~^ ERROR type mismatch resolving
+    baz(&a);
+    //~^ ERROR type mismatch resolving
+}