1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-mutate-in-guard.rs b/src/test/ui/borrowck/borrowck-mutate-in-guard.rs
new file mode 100644
index 000000000..9cbceeb94
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-mutate-in-guard.rs
@@ -0,0 +1,21 @@
+enum Enum<'a> {
+    A(&'a isize),
+    B(bool),
+}
+
+fn foo() -> isize {
+    let mut n = 42;
+    let mut x = Enum::A(&mut n);
+    match x {
+        Enum::A(_) if { x = Enum::B(false); false } => 1,
+        //~^ ERROR cannot assign `x` in match guard
+        Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
+        //~^ ERROR cannot mutably borrow `x` in match guard
+        Enum::A(p) => *p,
+        Enum::B(_) => 2,
+    }
+}
+
+fn main() {
+    foo();
+}