From abced206d7b9f07f39c1324913f498851e948799 Mon Sep 17 00:00:00 2001
From: Seo Sanghyeon <sanxiyn@gmail.com>
Date: Thu, 1 Feb 2024 06:09:55 +0900
Subject: [PATCH] Avoid deleting labeled blocks

---
 clippy_lints/src/no_effect.rs        | 2 +-
 tests/ui/unnecessary_operation.fixed | 7 +++++++
 tests/ui/unnecessary_operation.rs    | 7 +++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/clippy_lints/src/no_effect.rs b/clippy_lints/src/no_effect.rs
index 0d234f7f9..580160efe 100644
--- a/clippy_lints/src/no_effect.rs
+++ b/clippy_lints/src/no_effect.rs
@@ -357,7 +357,7 @@ fn reduce_expression<'a>(cx: &LateContext<'_>, expr: &'a Expr<'a>) -> Option<Vec
             }
         },
         ExprKind::Block(block, _) => {
-            if block.stmts.is_empty() {
+            if block.stmts.is_empty() && !block.targeted_by_break {
                 block.expr.as_ref().and_then(|e| {
                     match block.rules {
                         BlockCheckMode::UnsafeBlock(UnsafeSource::UserProvided) => None,
diff --git a/tests/ui/unnecessary_operation.fixed b/tests/ui/unnecessary_operation.fixed
index 463412dae..11761c6c9 100644
--- a/tests/ui/unnecessary_operation.fixed
+++ b/tests/ui/unnecessary_operation.fixed
@@ -106,4 +106,11 @@ fn main() {
 
     // Issue #11885
     Cout << 16;
+
+    // Issue #11575
+    // Bad formatting is required to trigger the bug
+    #[rustfmt::skip]
+    'label: {
+        break 'label
+    };
 }
diff --git a/tests/ui/unnecessary_operation.rs b/tests/ui/unnecessary_operation.rs
index f0d28e289..de0081289 100644
--- a/tests/ui/unnecessary_operation.rs
+++ b/tests/ui/unnecessary_operation.rs
@@ -110,4 +110,11 @@ fn main() {
 
     // Issue #11885
     Cout << 16;
+
+    // Issue #11575
+    // Bad formatting is required to trigger the bug
+    #[rustfmt::skip]
+    'label: {
+        break 'label
+    };
 }