1 files changed, 51 insertions, 0 deletions
diff --git a/tests/ui/lint/unused/must-use-ops.rs b/tests/ui/lint/unused/must-use-ops.rs
new file mode 100644
index 000000000..60f877aa8
--- /dev/null
+++ b/tests/ui/lint/unused/must-use-ops.rs
@@ -0,0 +1,51 @@
+// Issue #50124 - Test warning for unused operator expressions
+
+// check-pass
+
+#![warn(unused_must_use)]
+#![feature(never_type)]
+
+fn deref_never(x: &!) {
+    // Don't lint for uninhabited typess
+    *x;
+}
+
+fn main() {
+    let val = 1;
+    let val_pointer = &val;
+
+    // Comparison Operators
+    val == 1; //~ WARNING unused comparison
+    val < 1; //~ WARNING unused comparison
+    val <= 1; //~ WARNING unused comparison
+    val != 1; //~ WARNING unused comparison
+    val >= 1; //~ WARNING unused comparison
+    val > 1; //~ WARNING unused comparison
+
+    // Arithmetic Operators
+    val + 2; //~ WARNING unused arithmetic operation
+    val - 2; //~ WARNING unused arithmetic operation
+    val / 2; //~ WARNING unused arithmetic operation
+    val * 2; //~ WARNING unused arithmetic operation
+    val % 2; //~ WARNING unused arithmetic operation
+
+    // Logical Operators
+    true && true; //~ WARNING unused logical operation
+    false || true; //~ WARNING unused logical operation
+
+    // Bitwise Operators
+    5 ^ val; //~ WARNING unused bitwise operation
+    5 & val; //~ WARNING unused bitwise operation
+    5 | val; //~ WARNING unused bitwise operation
+    5 << val; //~ WARNING unused bitwise operation
+    5 >> val; //~ WARNING unused bitwise operation
+
+    // Unary Operators
+    !val; //~ WARNING unused unary operation
+    -val; //~ WARNING unused unary operation
+    *val_pointer; //~ WARNING unused unary operation
+
+    if false {
+        deref_never(&panic!());
+    }
+}