From 5f8496ca103fabb4cfc265d8d936e194129a17ef Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Mon, 30 Jan 2017 19:10:14 +0300
Subject: Clean buy dialog dungling pointer if buy dialog was destroyed.

---
 src/gui/windows/buydialog.cpp | 1 +
 src/net/buysellhandler.h      | 5 +++++
 src/net/ea/buysellhandler.cpp | 6 ++++++
 src/net/ea/buysellhandler.h   | 3 +++
 4 files changed, 15 insertions(+)

diff --git a/src/gui/windows/buydialog.cpp b/src/gui/windows/buydialog.cpp
index b0e7aaa04..ebf4ef8a4 100644
--- a/src/gui/windows/buydialog.cpp
+++ b/src/gui/windows/buydialog.cpp
@@ -409,6 +409,7 @@ BuyDialog::~BuyDialog()
 {
     delete2(mShopItems);
     instances.remove(this);
+    buySellHandler->cleanDialogReference(this);
 }
 
 void BuyDialog::setMoney(const int amount)
diff --git a/src/net/buysellhandler.h b/src/net/buysellhandler.h
index 79cb60b6c..e6f66129c 100644
--- a/src/net/buysellhandler.h
+++ b/src/net/buysellhandler.h
@@ -25,6 +25,8 @@
 
 #include "resources/item/shopitem.h"
 
+class BuyDialog;
+
 namespace Net
 {
 
@@ -52,6 +54,9 @@ class BuySellHandler notfinal
                                      const int amount) const = 0;
 
         virtual void close() const = 0;
+
+        virtual void cleanDialogReference(const BuyDialog *const dialog)
+                                          const = 0;
 };
 
 }  // namespace Net
diff --git a/src/net/ea/buysellhandler.cpp b/src/net/ea/buysellhandler.cpp
index 9a147347a..21769cef4 100644
--- a/src/net/ea/buysellhandler.cpp
+++ b/src/net/ea/buysellhandler.cpp
@@ -35,4 +35,10 @@ BuySellHandler::BuySellHandler()
     BuySellRecv::mBuyDialog = nullptr;
 }
 
+void BuySellHandler::cleanDialogReference(const BuyDialog *const dialog) const
+{
+    if (BuySellRecv::mBuyDialog == dialog)
+        BuySellRecv::mBuyDialog = nullptr;
+}
+
 }  // namespace Ea
diff --git a/src/net/ea/buysellhandler.h b/src/net/ea/buysellhandler.h
index 4343cd256..2c5e1caad 100644
--- a/src/net/ea/buysellhandler.h
+++ b/src/net/ea/buysellhandler.h
@@ -34,6 +34,9 @@ class BuySellHandler notfinal : public Net::BuySellHandler
         BuySellHandler();
 
         A_DELETE_COPY(BuySellHandler)
+
+        void cleanDialogReference(const BuyDialog *const dialog) const
+                                  override final;
 };
 
 }  // namespace Ea
-- 
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