From 7755f81bb8ba1c6a47e3a528acbbc462e56adaff Mon Sep 17 00:00:00 2001
From: Rubidium <rubidium@openttd.org>
Date: Wed, 12 May 2021 19:44:00 +0200
Subject: [PATCH] Codechange: make explicit that virtual functions in a
 con/destructor are resolved statically

This as during construction the sub class has not been initialized yet, and
during destruction the sub class has already been destroyed, so the overriding
virtual function would be accessing uninitialized data.
---
 src/fontcache.cpp            | 3 ++-
 src/script/script_config.cpp | 5 ++++-
 src/window.cpp               | 3 ++-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/fontcache.cpp b/src/fontcache.cpp
index ce15233b7e..530dc7cf80 100644
--- a/src/fontcache.cpp
+++ b/src/fontcache.cpp
@@ -216,7 +216,8 @@ TrueTypeFontCache::TrueTypeFontCache(FontSize fs, int pixels) : FontCache(fs), r
  */
 TrueTypeFontCache::~TrueTypeFontCache()
 {
-	this->ClearFontCache();
+	/* Virtual functions get called statically in destructors, so make it explicit to remove any confusion. */
+	this->TrueTypeFontCache::ClearFontCache();
 
 	for (auto &iter : this->font_tables) {
 		free(iter.second.second);
diff --git a/src/script/script_config.cpp b/src/script/script_config.cpp
index 9bb953c4c1..eeab51bede 100644
--- a/src/script/script_config.cpp
+++ b/src/script/script_config.cpp
@@ -37,6 +37,7 @@ void ScriptConfig::Change(const char *name, int version, bool force_exact_match,
 				this->SetSetting(item.name, InteractiveRandomRange(item.max_value + 1 - item.min_value) + item.min_value);
 			}
 		}
+
 		this->AddRandomDeviation();
 	}
 }
@@ -52,7 +53,9 @@ ScriptConfig::ScriptConfig(const ScriptConfig *config)
 	for (const auto &item : config->settings) {
 		this->settings[stredup(item.first)] = item.second;
 	}
-	this->AddRandomDeviation();
+
+	/* Virtual functions get called statically in constructors, so make it explicit to remove any confusion. */
+	this->ScriptConfig::AddRandomDeviation();
 }
 
 ScriptConfig::~ScriptConfig()
diff --git a/src/window.cpp b/src/window.cpp
index af47214454..bb7787581a 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -1094,7 +1094,8 @@ Window::~Window()
 
 	/* Make sure we don't try to access this window as the focused window when it doesn't exist anymore. */
 	if (_focused_window == this) {
-		this->OnFocusLost();
+		/* Virtual functions get called statically in destructors, so make it explicit to remove any confusion. */
+		this->Window::OnFocusLost();
 		_focused_window = nullptr;
 	}