Add testcases for item name conflict at the same path level.

src/Makefile

@@ -374,6 +374,7 @@ TEST_XFAILS_LLVM := $(addprefix test/run-pass/, \
                       i8-incr.rs \
                       import.rs \
                       inner-module.rs \
+                      item-name-overload.rs \
                       large-records.rs \
                       lazy-and-or.rs \
                       lazychan.rs \

src/test/compile-fail/item-name-overload.rs

@@ -0,0 +1,8 @@
+// -*- rust -*-
+
+mod foo {
+  fn bar[T](T f) -> int { ret 17; }
+  type bar[U, T] = tup(int, U, T);
+}
+
+fn main() {}

src/test/run-pass/item-name-overload.rs

@@ -0,0 +1,11 @@
+// -*- rust -*-
+
+mod foo {
+  fn baz() {}
+}
+
+mod bar {
+  fn baz() {}
+}
+
+fn main() {}