1 files changed, 13 insertions, 4 deletions
diff --git a/compiler/rustc_metadata/src/foreign_modules.rs b/compiler/rustc_metadata/src/foreign_modules.rs
index d1c2f3104..154eb684f 100644
--- a/compiler/rustc_metadata/src/foreign_modules.rs
+++ b/compiler/rustc_metadata/src/foreign_modules.rs
@@ -1,19 +1,28 @@
+use rustc_data_structures::fx::FxIndexMap;
 use rustc_hir as hir;
 use rustc_hir::def::DefKind;
+use rustc_hir::def_id::DefId;
+use rustc_middle::query::LocalCrate;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::cstore::ForeignModule;
 
-pub(crate) fn collect(tcx: TyCtxt<'_>) -> Vec<ForeignModule> {
-    let mut modules = Vec::new();
+pub(crate) fn collect(tcx: TyCtxt<'_>, LocalCrate: LocalCrate) -> FxIndexMap<DefId, ForeignModule> {
+    let mut modules = FxIndexMap::default();
+
+    // We need to collect all the `ForeignMod`, even if they are empty.
     for id in tcx.hir().items() {
         if !matches!(tcx.def_kind(id.owner_id), DefKind::ForeignMod) {
             continue;
         }
+
+        let def_id = id.owner_id.to_def_id();
         let item = tcx.hir().item(id);
-        if let hir::ItemKind::ForeignMod { items, .. } = item.kind {
+
+        if let hir::ItemKind::ForeignMod { abi, items } = item.kind {
             let foreign_items = items.iter().map(|it| it.id.owner_id.to_def_id()).collect();
-            modules.push(ForeignModule { foreign_items, def_id: id.owner_id.to_def_id() });
+            modules.insert(def_id, ForeignModule { def_id, abi, foreign_items });
         }
     }
+
     modules
 }