[gcc/devel/rust/master] Add testcase to show forward declared items work via TypeAlias

[Thomas Schwinge]

https://gcc.gnu.org/g:b37c71dd77db88e769b1119646cd25e99065c0da

commit b37c71dd77db88e769b1119646cd25e99065c0da
Author: Philip Herron <philip.herron@embecosm.com>
Date:   Tue Sep 27 08:57:49 2022 +0100

    Add testcase to show forward declared items work via TypeAlias
    
    Fixes #1073

Diff:
---
 gcc/testsuite/rust/compile/issue-1073.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/testsuite/rust/compile/issue-1073.rs b/gcc/testsuite/rust/compile/issue-1073.rs
new file mode 100644
index 00000000000..ac887c02b4d
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-1073.rs
@@ -0,0 +1,4 @@
+// { dg-options "-w" }
+type A = B;
+
+struct B;