diff --git a/src/librustc_ast_lowering/lib.rs b/src/librustc_ast_lowering/lib.rs
index a722a88a7a10..6abf3dac76a2 100644
--- a/src/librustc_ast_lowering/lib.rs
+++ b/src/librustc_ast_lowering/lib.rs
@@ -205,6 +205,8 @@ pub trait Resolver {
     fn lint_buffer(&mut self) -> &mut LintBuffer;
 
     fn next_node_id(&mut self) -> NodeId;
+
+    fn trait_map(&self) -> &NodeMap<Vec<hir::TraitCandidate>>;
 }
 
 type NtToTokenstream = fn(&Nonterminal, &ParseSess, Span) -> TokenStream;
@@ -557,6 +559,13 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         let proc_macros =
             c.proc_macros.iter().map(|id| self.node_id_to_hir_id[*id].unwrap()).collect();
 
+        let trait_map = self
+            .resolver
+            .trait_map()
+            .iter()
+            .map(|(&k, v)| (self.node_id_to_hir_id[k].unwrap(), v.clone()))
+            .collect();
+
         self.resolver.definitions().init_node_id_to_hir_id_mapping(self.node_id_to_hir_id);
 
         hir::Crate {
@@ -571,6 +580,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             trait_impls: self.trait_impls,
             modules: self.modules,
             proc_macros,
+            trait_map,
         }
     }
 
diff --git a/src/librustc_hir/hir.rs b/src/librustc_hir/hir.rs
index eb1db46fd2bd..7d1cb7738c35 100644
--- a/src/librustc_hir/hir.rs
+++ b/src/librustc_hir/hir.rs
@@ -639,6 +639,8 @@ pub struct Crate<'hir> {
     /// A list of proc macro HirIds, written out in the order in which
     /// they are declared in the static array generated by proc_macro_harness.
     pub proc_macros: Vec<HirId>,
+
+    pub trait_map: BTreeMap<HirId, Vec<TraitCandidate>>,
 }
 
 impl Crate<'hir> {
@@ -2651,7 +2653,7 @@ pub type CaptureModeMap = NodeMap<CaptureBy>;
 // The TraitCandidate's import_ids is empty if the trait is defined in the same module, and
 // has length > 0 if the trait is found through an chain of imports, starting with the
 // import/use statement in the scope where the trait is used.
-#[derive(Clone, Debug)]
+#[derive(RustcEncodable, RustcDecodable, Clone, Debug)]
 pub struct TraitCandidate {
     pub def_id: DefId,
     pub import_ids: SmallVec<[LocalDefId; 1]>,
diff --git a/src/librustc_middle/hir/map/collector.rs b/src/librustc_middle/hir/map/collector.rs
index 2906da437aba..2b3c21daa463 100644
--- a/src/librustc_middle/hir/map/collector.rs
+++ b/src/librustc_middle/hir/map/collector.rs
@@ -117,6 +117,7 @@ impl<'a, 'hir> NodeCollector<'a, 'hir> {
                 body_ids: _,
                 modules: _,
                 proc_macros: _,
+                trait_map: _,
             } = *krate;
 
             hash_body(&mut hcx, root_mod_def_path_hash, item, &mut hir_body_nodes)
diff --git a/src/librustc_middle/ty/context.rs b/src/librustc_middle/ty/context.rs
index 6380f8be98d1..5b44ffe8cafd 100644
--- a/src/librustc_middle/ty/context.rs
+++ b/src/librustc_middle/ty/context.rs
@@ -1101,9 +1101,9 @@ impl<'tcx> TyCtxt<'tcx> {
         };
 
         let mut trait_map: FxHashMap<_, FxHashMap<_, _>> = FxHashMap::default();
-        for (hir_id, v) in resolutions.trait_map.into_iter() {
+        for (hir_id, v) in krate.trait_map.iter() {
             let map = trait_map.entry(hir_id.owner).or_default();
-            map.insert(hir_id.local_id, StableVec::new(v));
+            map.insert(hir_id.local_id, StableVec::new(v.to_vec()));
         }
 
         GlobalCtxt {
diff --git a/src/librustc_middle/ty/mod.rs b/src/librustc_middle/ty/mod.rs
index ca0a1ac71c64..56fb3b58d3f6 100644
--- a/src/librustc_middle/ty/mod.rs
+++ b/src/librustc_middle/ty/mod.rs
@@ -121,7 +121,6 @@ pub struct ResolverOutputs {
     pub definitions: rustc_hir::definitions::Definitions,
     pub cstore: Box<CrateStoreDyn>,
     pub extern_crate_map: FxHashMap<LocalDefId, CrateNum>,
-    pub trait_map: FxHashMap<hir::HirId, Vec<hir::TraitCandidate>>,
     pub maybe_unused_trait_imports: FxHashSet<LocalDefId>,
     pub maybe_unused_extern_crates: Vec<(LocalDefId, Span)>,
     pub export_map: ExportMap<LocalDefId>,
diff --git a/src/librustc_resolve/lib.rs b/src/librustc_resolve/lib.rs
index 66e5612b627b..91bd15561417 100644
--- a/src/librustc_resolve/lib.rs
+++ b/src/librustc_resolve/lib.rs
@@ -1109,6 +1109,10 @@ impl rustc_ast_lowering::Resolver for Resolver<'_> {
     fn next_node_id(&mut self) -> NodeId {
         self.next_node_id()
     }
+
+    fn trait_map(&self) -> &NodeMap<Vec<TraitCandidate>> {
+        &self.trait_map
+    }
 }
 
 impl<'a> Resolver<'a> {
@@ -1284,11 +1288,6 @@ impl<'a> Resolver<'a> {
         let definitions = self.definitions;
         let extern_crate_map = self.extern_crate_map;
         let export_map = self.export_map;
-        let trait_map = self
-            .trait_map
-            .into_iter()
-            .map(|(k, v)| (definitions.node_id_to_hir_id(k), v))
-            .collect();
         let maybe_unused_trait_imports = self.maybe_unused_trait_imports;
         let maybe_unused_extern_crates = self.maybe_unused_extern_crates;
         let glob_map = self.glob_map;
@@ -1297,7 +1296,6 @@ impl<'a> Resolver<'a> {
             cstore: Box::new(self.crate_loader.into_cstore()),
             extern_crate_map,
             export_map,
-            trait_map,
             glob_map,
             maybe_unused_trait_imports,
             maybe_unused_extern_crates,
@@ -1315,11 +1313,6 @@ impl<'a> Resolver<'a> {
             cstore: Box::new(self.cstore().clone()),
             extern_crate_map: self.extern_crate_map.clone(),
             export_map: self.export_map.clone(),
-            trait_map: self
-                .trait_map
-                .iter()
-                .map(|(&k, v)| (self.definitions.node_id_to_hir_id(k), v.clone()))
-                .collect(),
             glob_map: self.glob_map.clone(),
             maybe_unused_trait_imports: self.maybe_unused_trait_imports.clone(),
             maybe_unused_extern_crates: self.maybe_unused_extern_crates.clone(),