[gcc r15-8183] gccrs: Safegaurd InlineAsm's clone_expr_...

[Arthur Cohen]

https://gcc.gnu.org/g:bcd7de43808fb4bc5f761dd88bd84f69b029c7c0

commit r15-8183-gbcd7de43808fb4bc5f761dd88bd84f69b029c7c0
Author: jjasmine <tanghocle456@gmail.com>
Date:   Fri May 24 15:35:16 2024 -0700

    gccrs: Safegaurd InlineAsm's clone_expr_...
    
    Safegaurd InlineAsm's clone_expr_... with unreachable since
    we would never use them.
    
    gcc/rust/ChangeLog:
    
            * ast/rust-expr.h:
            Safegaurd InlineAsm's clone_expr_... with unreachable.

Diff:
---
 gcc/rust/ast/rust-expr.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/rust/ast/rust-expr.h b/gcc/rust/ast/rust-expr.h
index bceef827dfb0..1af72965a93e 100644
--- a/gcc/rust/ast/rust-expr.h
+++ b/gcc/rust/ast/rust-expr.h
@@ -4873,6 +4873,7 @@ public:
 
   ExprWithoutBlock *clone_expr_without_block_impl () const override
   {
+    rust_unreachable ();
     return nullptr;
   }
 };