From 736bfe29ff25926b86d1d902a249dc9f44c9d83b Mon Sep 17 00:00:00 2001
From: lx-s <lx-s@users.noreply.github.com>
Date: Wed, 8 Jul 2026 10:40:10 +0200
Subject: [PATCH] Fixed possible crash in LogDialog (if WM_SIZE happens before
 init)

---
 WinMute/LogDialog.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/WinMute/LogDialog.cpp b/WinMute/LogDialog.cpp
index da3f030..251182d 100644
--- a/WinMute/LogDialog.cpp
+++ b/WinMute/LogDialog.cpp
@@ -87,6 +87,10 @@ INT_PTR CALLBACK LogDlgProc(HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam)
       return 0;
    case WM_SIZE:
       {
+      // WM_SIZE arrives before WM_INITDIALOG, when dlgData is not set yet
+      if (dlgData == nullptr) {
+         return 0;
+      }
       RECT rcClient;
       GetClientRect(hDlg, &rcClient);
       SetWindowPos(
@@ -102,7 +106,7 @@ INT_PTR CALLBACK LogDlgProc(HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam)
    case WM_LOG_UPDATED: {
       const WMLog &wmLog = WMLog::GetInstance();
       auto logMsg = reinterpret_cast<LogMessage*>(lParam);
-      if (logMsg == nullptr) {
+      if (dlgData == nullptr || logMsg == nullptr) {
          return FALSE;
       }
       const auto formattedMsg = wmLog.FormatLogMessage(*logMsg, true);
-- 
2.43.0