gccrs: Fix missing error on duplicated nodes

When we tried to insert a shadowable node and another shadowable node has
been inserted before, we didn't emit any error if the node has already
been inserted previously and failed silently.

gcc/rust/ChangeLog:

	* resolve/rust-rib.cc (Rib::insert): Emit an error when trying to
	insert an already inserted node.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

diff --git a/gcc/rust/resolve/rust-rib.cc b/gcc/rust/resolve/rust-rib.cc
index 0a8fce34a1a9cd388cecaa60edfc607e04f2ace5..714507219e02580df0febbfed1d0ece8055e7378 100644 (file)
--- a/gcc/rust/resolve/rust-rib.cc
+++ b/gcc/rust/resolve/rust-rib.cc
@@ -92,9 +92,9 @@ Rib::insert (std::string name, Definition def)
        {
          if (std::find (current.ids.cbegin (), current.ids.cend (), id)
              == current.ids.cend ())
-           {
-             current.ids.push_back (id);
-           }
+           current.ids.push_back (id);
+         else
+           return tl::make_unexpected (DuplicateNameError (name, id));
        }
     }
   else if (it->second.shadowable)