[gcc r14-8029] gccrs: Add test for parser bug

[Arthur Cohen]

https://gcc.gnu.org/g:c20d7924f1515c99def98935bdf31d269eab6856

commit r14-8029-gc20d7924f1515c99def98935bdf31d269eab6856
Author: Jakub Dupak <dev@jakubdupak.com>
Date:   Thu Oct 5 14:52:24 2023 +0200

    gccrs: Add test for parser bug
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/issue-2645.rs: New test.
    
    Signed-off-by: Jakub Dupak <dev@jakubdupak.com>

Diff:
---
 gcc/testsuite/rust/compile/issue-2645.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/testsuite/rust/compile/issue-2645.rs b/gcc/testsuite/rust/compile/issue-2645.rs
new file mode 100644
index 00000000000..ef1403de1a7
--- /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
+}