1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/testsuite/gdc.test/fail_compilation/test12385.d b/gcc/testsuite/gdc.test/fail_compilation/test12385.d
new file mode 100644
index 00000000000..cbba723fe74
--- /dev/null
+++ b/gcc/testsuite/gdc.test/fail_compilation/test12385.d
@@ -0,0 +1,30 @@
+/*
+TEST_OUTPUT:
+---
+fail_compilation/test12385.d(29): Error: cannot modify `immutable` expression `unbundled.x`
+---
+*/
+
+// https://issues.dlang.org/show_bug.cgi?id=12385
+
+class BundledState
+{
+    string m_State;
+
+    int x = 3;
+
+    this(string state) immutable
+    {
+        m_State = state;
+    }
+}
+
+enum States : immutable(BundledState)
+{
+    unbundled = new immutable BundledState("bla"),
+}
+
+void main()
+{
+    States.unbundled.x = 6; // Modifies x.
+}