librustc: Make methods private if the impl is private

src/test/compile-fail/private-method-inherited.rs

@@ -0,0 +1,15 @@
+// Tests that inherited visibility applies to methods.
+
+mod a {
+    pub struct Foo;
+
+    impl Foo {
+        fn f(self) {}
+    }
+}
+
+fn main() {
+    let x = a::Foo;
+    x.f();  //~ ERROR method `f` is private
+}
+