[gcc r16-2934] gccrs: Add test case to show issue is fixed

[Arthur Cohen via Gcc-cvs]

https://gcc.gnu.org/g:65b8519344ef2eb5f6bbd6890aaf324db76677db

commit r16-2934-g65b8519344ef2eb5f6bbd6890aaf324db76677db
Author: Philip Herron <herron.phi...@googlemail.com>
Date:   Fri Jul 11 12:20:04 2025 +0100

    gccrs: Add test case to show issue is fixed
    
    Fixes Rust-GCC#1048
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/issue-1048.rs: New test.
    
    Signed-off-by: Philip Herron <herron.phi...@googlemail.com>

Diff:
---
 gcc/testsuite/rust/compile/issue-1048.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/testsuite/rust/compile/issue-1048.rs 
b/gcc/testsuite/rust/compile/issue-1048.rs
new file mode 100644
index 000000000000..8d4053a37a1e
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-1048.rs
@@ -0,0 +1,8 @@
+macro_rules! maybe_return { ($e:expr) => ($e); }
+
+fn frob(x: i32) -> i32{
+    maybe_return! {x}
+    // { dg-error "mismatched types. expected .... but got .i32. .E0308." "" { 
target *-*-* } .-1 }
+    // should return -1 
+    -1
+}