From 47361baf61d635e65346d796c609d534e65d20d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Dziwi=C5=84ski?= <piotrdz@gmail.com>
Date: Fri, 7 May 2021 09:42:44 +1200
Subject: [PATCH] [C++] Fix union copy constructor to work with nested structs
 (#6552) (#6607)

---
 src/idl_gen_cpp.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/idl_gen_cpp.cpp b/src/idl_gen_cpp.cpp
index f80af0459..210a38f7a 100644
--- a/src/idl_gen_cpp.cpp
+++ b/src/idl_gen_cpp.cpp
@@ -1534,7 +1534,8 @@ class CppGenerator : public BaseGenerator {
         code_.SetValue("TYPE", GetUnionElement(ev, true, opts_));
         code_ += "    case {{LABEL}}: {";
         bool copyable = true;
-        if (ev.union_type.base_type == BASE_TYPE_STRUCT) {
+        if (ev.union_type.base_type == BASE_TYPE_STRUCT &&
+            !ev.union_type.struct_def->fixed) {
           // Don't generate code to copy if table is not copyable.
           // TODO(wvo): make tables copyable instead.
           for (auto fit = ev.union_type.struct_def->fields.vec.begin();