3 files changed, 17 insertions, 0 deletions
diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc
index 81357a8..31f5c81 100644
--- a/gcc/cp/module.cc
+++ b/gcc/cp/module.cc
@@ -6733,6 +6733,7 @@ trees_out::core_vals (tree t)
       WT (((lang_tree_node *)t)->baselink.binfo);
       WT (((lang_tree_node *)t)->baselink.functions);
       WT (((lang_tree_node *)t)->baselink.access_binfo);
+      WT (((lang_tree_node *)t)->baselink.common.chain);
       break;
 
     case CONSTRAINT_INFO:
@@ -7302,6 +7303,7 @@ trees_in::core_vals (tree t)
       RT (((lang_tree_node *)t)->baselink.binfo);
       RTU (((lang_tree_node *)t)->baselink.functions);
       RT (((lang_tree_node *)t)->baselink.access_binfo);
+      RT (((lang_tree_node *)t)->baselink.common.chain);
       break;
 
     case CONSTRAINT_INFO:
diff --git a/gcc/testsuite/g++.dg/modules/convop-2_a.H b/gcc/testsuite/g++.dg/modules/convop-2_a.H
new file mode 100644
index 0000000..62bb210
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/convop-2_a.H
@@ -0,0 +1,10 @@
+// PR c++/122381
+// { dg-additional-options "-fmodule-header" }
+// { dg-module-cmi {} }
+
+template <typename T> struct color_ref {
+  operator int() const { return 0; }
+  int foo(color_ref x) {
+    return x.operator int();
+  }
+};
diff --git a/gcc/testsuite/g++.dg/modules/convop-2_b.C b/gcc/testsuite/g++.dg/modules/convop-2_b.C
new file mode 100644
index 0000000..d1e829e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/convop-2_b.C
@@ -0,0 +1,5 @@
+// PR c++/122381
+// { dg-additional-options "-fmodules" }
+
+import "convop-2_a.H";
+template struct color_ref<int>;