1 files changed, 12 insertions, 0 deletions
diff --git a/src/test/ui/rust-2018/uniform-paths/ambiguity.rs b/src/test/ui/rust-2018/uniform-paths/ambiguity.rs
new file mode 100644
index 000000000..60f77a1c6
--- /dev/null
+++ b/src/test/ui/rust-2018/uniform-paths/ambiguity.rs
@@ -0,0 +1,12 @@
+// edition:2018
+
+#![allow(non_camel_case_types)]
+
+use std::io;
+//~^ ERROR `std` is ambiguous
+
+mod std {
+    pub struct io;
+}
+
+fn main() {}