diff --git a/lldb/include/lldb/Symbol/SymbolFile.h b/lldb/include/lldb/Symbol/SymbolFile.h
--- a/lldb/include/lldb/Symbol/SymbolFile.h
+++ b/lldb/include/lldb/Symbol/SymbolFile.h
@@ -421,6 +421,8 @@
            Type::ResolveState compiler_type_resolve_state,
            uint32_t opaque_payload = 0) = 0;
 
+  virtual lldb::TypeSP CopyType(const lldb::TypeSP &other_type) = 0;
+
 protected:
   void AssertModuleLock();
 
@@ -521,6 +523,15 @@
      return type_sp;
   }
 
+  lldb::TypeSP CopyType(const lldb::TypeSP &other_type) override {
+     // Make sure the real symbol file matches when copying types.
+     if (GetBackingSymbolFile() != other_type->GetSymbolFile())
+      return lldb::TypeSP();
+     lldb::TypeSP type_sp(new Type(*other_type));
+     m_type_list.Insert(type_sp);
+     return type_sp;
+  }
+
 protected:
   virtual uint32_t CalculateNumCompileUnits() = 0;
   virtual lldb::CompUnitSP ParseCompileUnitAtIndex(uint32_t idx) = 0;
diff --git a/lldb/include/lldb/Symbol/SymbolFileOnDemand.h b/lldb/include/lldb/Symbol/SymbolFileOnDemand.h
--- a/lldb/include/lldb/Symbol/SymbolFileOnDemand.h
+++ b/lldb/include/lldb/Symbol/SymbolFileOnDemand.h
@@ -241,6 +241,10 @@
         compiler_qual_type, compiler_type_resolve_state, opaque_payload);
   }
 
+  lldb::TypeSP CopyType(const lldb::TypeSP &other_type) override {
+    return m_sym_file_impl->CopyType(other_type);
+  }
+
 private:
   Log *GetLog() const { return ::lldb_private::GetLog(LLDBLog::OnDemand); }
 
diff --git a/lldb/include/lldb/Symbol/Type.h b/lldb/include/lldb/Symbol/Type.h
--- a/lldb/include/lldb/Symbol/Type.h
+++ b/lldb/include/lldb/Symbol/Type.h
@@ -241,6 +241,14 @@
   // This makes an invalid type.  Used for functions that return a Type when
   // they get an error.
   Type();
+
+  Type(Type &t) = default;
+
+  Type(Type &&t) = default;
+
+  Type &operator=(const Type &t) = default;
+
+  Type &operator=(Type &&t) = default;
 };
 
 // the two classes here are used by the public API as a backend to the SBType