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diff --git a/src/test/ui/nll/issue-27282-move-match-input-into-guard.rs b/src/test/ui/nll/issue-27282-move-match-input-into-guard.rs
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+++ b/src/test/ui/nll/issue-27282-move-match-input-into-guard.rs
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+// Issue 27282: Example 2: This sidesteps the AST checks disallowing
+// mutable borrows in match guards by hiding the mutable borrow in a
+// guard behind a move (of the mutably borrowed match input) within a
+// closure.
+//
+// This example is not rejected by AST borrowck (and then reliably
+// reaches the panic code when executed, despite the compiler warning
+// about that match arm being unreachable.
+
+fn main() {
+    let b = &mut true;
+    match b {
+        //~^ ERROR use of moved value: `b` [E0382]
+        &mut false => {},
+        _ if { (|| { let bar = b; *bar = false; })();
+                     false } => { },
+        &mut true => { println!("You might think we should get here"); },
+        _ => panic!("surely we could never get here, since rustc warns it is unreachable."),
+    }
+}