From 384189c3d9af20146a4bcef382eca4f0ff9fe47e Mon Sep 17 00:00:00 2001
From: Santiago Pastorino <spastorino@gmail.com>
Date: Wed, 26 Jan 2022 09:53:17 -0300
Subject: [PATCH] Filter out local_id == 0, those are already considered on the
 call site

---
 compiler/rustc_ast_lowering/src/lib.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/compiler/rustc_ast_lowering/src/lib.rs b/compiler/rustc_ast_lowering/src/lib.rs
index cc14f48b6bdea..32cec3a295a4e 100644
--- a/compiler/rustc_ast_lowering/src/lib.rs
+++ b/compiler/rustc_ast_lowering/src/lib.rs
@@ -483,9 +483,13 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         let local_id_to_def_id = local_node_ids
             .iter()
             .filter_map(|&node_id| {
-                let def_id = self.resolver.opt_local_def_id(node_id)?;
                 let hir_id = self.node_id_to_hir_id[node_id]?;
-                Some((hir_id.local_id, def_id))
+                if hir_id.local_id == hir::ItemLocalId::new(0) {
+                    None
+                } else {
+                    let def_id = self.resolver.opt_local_def_id(node_id)?;
+                    Some((hir_id.local_id, def_id))
+                }
             })
             .collect();