1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/pattern/usefulness/deny-irrefutable-let-patterns.rs b/src/test/ui/pattern/usefulness/deny-irrefutable-let-patterns.rs
new file mode 100644
index 000000000..c85af7f3b
--- /dev/null
+++ b/src/test/ui/pattern/usefulness/deny-irrefutable-let-patterns.rs
@@ -0,0 +1,16 @@
+#![feature(if_let_guard)]
+
+#![deny(irrefutable_let_patterns)]
+
+fn main() {
+    if let _ = 5 {} //~ ERROR irrefutable `if let` pattern
+
+    while let _ = 5 { //~ ERROR irrefutable `while let` pattern
+        break;
+    }
+
+    match 5 {
+        _ if let _ = 2 => {} //~ ERROR irrefutable `if let` guard pattern
+        _ => {}
+    }
+}