1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/loops/loop-proper-liveness.rs b/tests/ui/loops/loop-proper-liveness.rs
new file mode 100644
index 00000000000..6546e397785
--- /dev/null
+++ b/tests/ui/loops/loop-proper-liveness.rs
@@ -0,0 +1,32 @@
+fn test1() {
+    // In this test the outer 'a loop may terminate without `x` getting initialised. Although the
+    // `x = loop { ... }` statement is reached, the value itself ends up never being computed and
+    // thus leaving `x` uninit.
+    let x: i32;
+    'a: loop {
+        x = loop { break 'a };
+    }
+    println!("{:?}", x); //~ ERROR E0381
+}
+
+// test2 and test3 should not fail.
+fn test2() {
+    // In this test the `'a` loop will never terminate thus making the use of `x` unreachable.
+    let x: i32;
+    'a: loop {
+        x = loop { continue 'a };
+    }
+    println!("{:?}", x);
+}
+
+fn test3() {
+    let x: i32;
+    // Similarly, the use of variable `x` is unreachable.
+    'a: loop {
+        x = loop { return };
+    }
+    println!("{:?}", x);
+}
+
+fn main() {
+}