diff --git a/gcc/testsuite/rust/compile/issue-2645.rs b/gcc/testsuite/rust/compile/issue-2645.rs
new file mode 100644
index 000000000000..ef1403de1a78
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-2645.rs
@@ -0,0 +1,4 @@
+// { dg-additional-options "-frust-compile-until=ast" }
+pub fn struct_tuple(A { 0: a, 1: ref b }: A) -> i32 {
+    a
+}