[gcc r15-8333] gccrs: Fix warnings from const auto& to const auto

[Arthur Cohen]

https://gcc.gnu.org/g:e2126a193567e97e57c854ef59952c6df3063bbf

commit r15-8333-ge2126a193567e97e57c854ef59952c6df3063bbf
Author: badumbatish <tanghocle456@gmail.com>
Date:   Sun Aug 4 12:43:09 2024 -0700

    gccrs: Fix warnings from const auto& to const auto
    
    gcc/rust/ChangeLog:
    
            * resolve/rust-ast-resolve.cc (NameResolution::go):
            Fix warnings from const auto& to const auto

Diff:
---
 gcc/rust/resolve/rust-ast-resolve.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gcc/rust/resolve/rust-ast-resolve.cc b/gcc/rust/resolve/rust-ast-resolve.cc
index a467d1e38b4c..a093ef7f444d 100644
--- a/gcc/rust/resolve/rust-ast-resolve.cc
+++ b/gcc/rust/resolve/rust-ast-resolve.cc
@@ -63,7 +63,10 @@ NameResolution::go (AST::Crate &crate)
 {
   // lookup current crate name
   CrateNum cnum = mappings.get_current_crate ();
-  const auto &crate_name = mappings.get_crate_name (cnum).value ();
+
+  // Clones the crate name instead of references due to gcc's possibly
+  // dangling references warnings
+  const auto crate_name = mappings.get_crate_name (cnum).value ();
 
   // setup the ribs
   NodeId scope_node_id = crate.get_node_id ();