1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/binding/ambiguity-item.rs b/tests/ui/binding/ambiguity-item.rs
new file mode 100644
index 000000000..0f48340c2
--- /dev/null
+++ b/tests/ui/binding/ambiguity-item.rs
@@ -0,0 +1,19 @@
+// Identifier pattern referring to an ambiguity item is an error (issue #46079).
+
+mod m {
+    pub fn f() {}
+}
+use m::*;
+
+mod n {
+    pub fn f() {}
+}
+use n::*; // OK, no conflict with `use m::*;`
+
+fn main() {
+    let v = f; //~ ERROR `f` is ambiguous
+    match v {
+        f => {} //~ ERROR `f` is ambiguous
+        mut f => {} // OK, unambiguously a fresh binding due to `mut`
+    }
+}