From 0c4d438a0e027f2dd295bc5f679adfe56f69f389 Mon Sep 17 00:00:00 2001
From: Christopher Lam <christopher.lck@gmail.com>
Date: Wed, 6 Apr 2022 07:15:09 +0800
Subject: [PATCH] [kvp-frame.cpp] expose iterator, skip inexistent frame

---
 libgnucash/engine/kvp-frame.cpp | 2 ++
 libgnucash/engine/kvp-frame.hpp | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/libgnucash/engine/kvp-frame.cpp b/libgnucash/engine/kvp-frame.cpp
index 74d33b8fa1..56be042d4c 100644
--- a/libgnucash/engine/kvp-frame.cpp
+++ b/libgnucash/engine/kvp-frame.cpp
@@ -78,6 +78,8 @@ KvpFrame::get_child_frame_or_nullptr (Path const & path) noexcept
     if (map_iter == m_valuemap.end ())
         return nullptr;
     auto child = map_iter->second->get <KvpFrame *> ();
+    if (!child)
+        return nullptr;
     Path send;
     std::copy (path.begin () + 1, path.end (), std::back_inserter (send));
     return child->get_child_frame_or_nullptr (send);
diff --git a/libgnucash/engine/kvp-frame.hpp b/libgnucash/engine/kvp-frame.hpp
index 253eec3187..704d5a3d7b 100644
--- a/libgnucash/engine/kvp-frame.hpp
+++ b/libgnucash/engine/kvp-frame.hpp
@@ -226,6 +226,9 @@ struct KvpFrameImpl
     bool empty() const noexcept { return m_valuemap.empty(); }
     friend int compare(const KvpFrameImpl&, const KvpFrameImpl&) noexcept;
 
+    map_type::iterator begin() { return m_valuemap.begin(); }
+    map_type::iterator end() { return m_valuemap.end(); }
+
     private:
     map_type m_valuemap;