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-rw-r--r--src/test/ui/lint/must_use-tuple.rs5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/test/ui/lint/must_use-tuple.rs b/src/test/ui/lint/must_use-tuple.rs
new file mode 100644
index 00000000000..bc972d7ffc3
--- /dev/null
+++ b/src/test/ui/lint/must_use-tuple.rs
@@ -0,0 +1,5 @@
+#![deny(unused_must_use)]
+
+fn main() {
+    (Ok::<(), ()>(()),); //~ ERROR unused `std::result::Result` that must be used
+}