1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/rust-2018/uniform-paths/ambiguity-macros.rs b/tests/ui/rust-2018/uniform-paths/ambiguity-macros.rs
new file mode 100644
index 00000000000..56ea726d73e
--- /dev/null
+++ b/tests/ui/rust-2018/uniform-paths/ambiguity-macros.rs
@@ -0,0 +1,19 @@
+// edition:2018
+
+// This test is similar to `ambiguity.rs`, but with macros defining local items.
+
+#![allow(non_camel_case_types)]
+
+use std::io;
+//~^ ERROR `std` is ambiguous
+
+macro_rules! m {
+    () => {
+        mod std {
+            pub struct io;
+        }
+    }
+}
+m!();
+
+fn main() {}