gccrs: Add testcase to show forward declared items work

Fixes #1006

gcc/testsuite/ChangeLog:

	* rust/compile/issue-1006.rs: New test.

diff --git a/gcc/testsuite/rust/compile/issue-1006.rs b/gcc/testsuite/rust/compile/issue-1006.rs
new file mode 100644 (file)
index 0000000..7f565de
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-1006.rs
@@ -0,0 +1,10 @@
+// { dg-options "-w" }
+union B {
+    a: A,
+    b: f32,
+}
+
+struct A {
+    data: i32,
+    len: usize,
+}