1 files changed, 51 insertions, 0 deletions
diff --git a/tests/ui/imports/duplicate.rs b/tests/ui/imports/duplicate.rs
new file mode 100644
index 00000000000..db6538969ec
--- /dev/null
+++ b/tests/ui/imports/duplicate.rs
@@ -0,0 +1,51 @@
+mod a {
+    pub fn foo() {}
+}
+
+mod b {
+    pub fn foo() {}
+}
+
+mod c {
+    pub use a::foo;
+}
+
+mod d {
+    use a::foo;
+    use a::foo; //~ ERROR the name `foo` is defined multiple times
+}
+
+mod e {
+    pub use a::*;
+    pub use c::*; // ok
+}
+
+mod f {
+    pub use a::*;
+    pub use b::*;
+}
+
+mod g {
+    pub use a::*;
+    pub use f::*;
+}
+
+fn main() {
+    e::foo();
+    f::foo(); //~ ERROR `foo` is ambiguous
+    g::foo();
+}
+
+mod ambiguous_module_errors {
+    pub mod m1 { pub use super::m1 as foo; pub fn bar() {} }
+    pub mod m2 { pub use super::m2 as foo; }
+
+    use self::m1::*;
+    use self::m2::*;
+
+    use self::foo::bar; //~ ERROR `foo` is ambiguous
+
+    fn f() {
+        foo::bar(); //~ ERROR `foo` is ambiguous
+    }
+}