1 files changed, 23 insertions, 0 deletions
diff --git a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs
new file mode 100644
index 000000000..833ca8afd
--- /dev/null
+++ b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs
@@ -0,0 +1,23 @@
+// Issue 27282: Example 1: This sidesteps the AST checks disallowing
+// mutable borrows in match guards by hiding the mutable borrow in a
+// guard behind a move (of the ref mut pattern id) within a closure.
+
+#![feature(if_let_guard)]
+
+fn main() {
+    match Some(&4) {
+        None => {},
+        ref mut foo
+            if { (|| { let bar = foo; bar.take() })(); false } => {},
+        //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
+        Some(s) => std::process::exit(*s),
+    }
+
+    match Some(&4) {
+        None => {},
+        ref mut foo
+            if let Some(()) = { (|| { let bar = foo; bar.take() })(); None } => {},
+        //~^ ERROR cannot move out of `foo` in pattern guard [E0507]
+        Some(s) => std::process::exit(*s),
+    }
+}