From 1e0b0b2cd9199d6fefa9d2eb1d36fe71a712d911 Mon Sep 17 00:00:00 2001
From: SinghRajenM <singh.rajen15@gmail.com>
Date: Thu, 8 Mar 2018 20:23:57 +0530
Subject: [PATCH] Fix crash on styler dialog of User Defined Language dialog

Fixes #2646, fixes #4215, close #4279
---
 PowerEditor/src/ScitillaComponent/UserDefineDialog.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/PowerEditor/src/ScitillaComponent/UserDefineDialog.cpp b/PowerEditor/src/ScitillaComponent/UserDefineDialog.cpp
index ea30976bb..6d4c1e2ee 100644
--- a/PowerEditor/src/ScitillaComponent/UserDefineDialog.cpp
+++ b/PowerEditor/src/ScitillaComponent/UserDefineDialog.cpp
@@ -1667,6 +1667,9 @@ INT_PTR CALLBACK StylerDlg::dlgProc(HWND hwnd, UINT message, WPARAM wParam, LPAR
 
         case WM_COMMAND :
         {
+			if (dlg == nullptr)
+				return FALSE;
+
             Style & style = SharedParametersDialog::_pUserLang->_styleArray.getStyler(dlg->_stylerIndex);
             if (HIWORD(wParam) == CBN_SELCHANGE)
             {