1 files changed, 9 insertions, 0 deletions
diff --git a/tests/mir-opt/const_prop/mutable_variable.rs b/tests/mir-opt/const_prop/mutable_variable.rs
new file mode 100644
index 000000000..cb01719dd
--- /dev/null
+++ b/tests/mir-opt/const_prop/mutable_variable.rs
@@ -0,0 +1,9 @@
+// unit-test
+// compile-flags: -O
+
+// EMIT_MIR mutable_variable.main.ConstProp.diff
+fn main() {
+    let mut x = 42;
+    x = 99;
+    let y = x;
+}