1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/testsuite/gdc.test/runnable/test21020.d b/gcc/testsuite/gdc.test/runnable/test21020.d
new file mode 100644
index 0000000..484db30
--- /dev/null
+++ b/gcc/testsuite/gdc.test/runnable/test21020.d
@@ -0,0 +1,11 @@
+// https://github.com/dlang/dmd/issues/21020
+
+shared struct Queue {
+    int[int] map;
+}
+
+void main() {
+    auto queue = Queue();
+    (cast(int[int]) queue.map)[1] = 2;
+    assert(queue.map[1] == 2);
+}