From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:13 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 tests/ui/derives/clone-debug-dead-code.rs | 45 +++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 tests/ui/derives/clone-debug-dead-code.rs

(limited to 'tests/ui/derives/clone-debug-dead-code.rs')

diff --git a/tests/ui/derives/clone-debug-dead-code.rs b/tests/ui/derives/clone-debug-dead-code.rs
new file mode 100644
index 000000000..ab49260c0
--- /dev/null
+++ b/tests/ui/derives/clone-debug-dead-code.rs
@@ -0,0 +1,45 @@
+// Checks that derived implementations of Clone and Debug do not
+// contribute to dead code analysis (issue #84647).
+
+#![forbid(dead_code)]
+
+struct A { f: () }
+//~^ ERROR: field `f` is never read
+
+#[derive(Clone)]
+struct B { f: () }
+//~^ ERROR: field `f` is never read
+
+#[derive(Debug)]
+struct C { f: () }
+//~^ ERROR: field `f` is never read
+
+#[derive(Debug,Clone)]
+struct D { f: () }
+//~^ ERROR: field `f` is never read
+
+struct E { f: () }
+//~^ ERROR: field `f` is never read
+// Custom impl, still doesn't read f
+impl Clone for E {
+    fn clone(&self) -> Self {
+        Self { f: () }
+    }
+}
+
+struct F { f: () }
+// Custom impl that actually reads f
+impl Clone for F {
+    fn clone(&self) -> Self {
+        Self { f: self.f }
+    }
+}
+
+fn main() {
+    let _ = A { f: () };
+    let _ = B { f: () };
+    let _ = C { f: () };
+    let _ = D { f: () };
+    let _ = E { f: () };
+    let _ = F { f: () };
+}
-- 
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