librustc: Disallow `use` from reaching into impls or traits.

This can perhaps be restored in the future. For now this is a precursor to
making typedefs work as expected.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/test/auxiliary/use_from_trait_xc.rs b/src/test/auxiliary/use_from_trait_xc.rs
new file mode 100644
index 00000000000..2ab95c271ae
--- /dev/null
+++ b/src/test/auxiliary/use_from_trait_xc.rs
@@ -0,0 +1,10 @@
+pub trait Trait {
+    fn foo();
+}
+
+struct Foo;
+
+impl Foo {
+    pub fn new() {}
+}
+