From 3a88e1031be9ad97459c4de4f77319e19cbb648d Mon Sep 17 00:00:00 2001
From: 360 CodeSafe <39950310+360CodeSafe@users.noreply.github.com>
Date: Fri, 31 May 2019 08:50:21 +0800
Subject: [PATCH] Dereference of null pointer #5353 (#5376)

add an assert to make sure that `key_field` is not a null pointer.
---
 src/idl_gen_general.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/idl_gen_general.cpp b/src/idl_gen_general.cpp
index ddaae8f4e..4e1be8b2a 100644
--- a/src/idl_gen_general.cpp
+++ b/src/idl_gen_general.cpp
@@ -1450,6 +1450,7 @@ class GeneralGenerator : public BaseGenerator {
     // Only generate key compare function for table,
     // because `key_field` is not set for struct
     if (struct_def.has_key && !struct_def.fixed) {
+      FLATBUFFERS_ASSERT(key_field);
       if (lang_.language == IDLOptions::kJava) {
         code += "\n  @Override\n  protected int keysCompare(";
         code += "Integer o1, Integer o2, ByteBuffer _bb) {";