Index: ps/trunk/source/graphics/LOSTexture.h
===================================================================
--- ps/trunk/source/graphics/LOSTexture.h
+++ ps/trunk/source/graphics/LOSTexture.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2014 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -83,7 +83,7 @@
 	void RecomputeTexture(int unit);
 
 	size_t GetBitmapSize(size_t w, size_t h, size_t* pitch);
-	void GenerateBitmap(ICmpRangeManager::CLosQuerier los, u8* losData, size_t w, size_t h, size_t pitch);
+	void GenerateBitmap(const ICmpRangeManager::CLosQuerier& los, u8* losData, size_t w, size_t h, size_t pitch);
 
 	CSimulation2& m_Simulation;
 
Index: ps/trunk/source/graphics/LOSTexture.cpp
===================================================================
--- ps/trunk/source/graphics/LOSTexture.cpp
+++ ps/trunk/source/graphics/LOSTexture.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2014 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -364,7 +364,7 @@
 	return *pitch * (h + g_BlurSize - 1);
 }
 
-void CLOSTexture::GenerateBitmap(ICmpRangeManager::CLosQuerier los, u8* losData, size_t w, size_t h, size_t pitch)
+void CLOSTexture::GenerateBitmap(const ICmpRangeManager::CLosQuerier& los, u8* losData, size_t w, size_t h, size_t pitch)
 {
 	u8 *dataPtr = losData;
 
Index: ps/trunk/source/gui/CGUISprite.h
===================================================================
--- ps/trunk/source/gui/CGUISprite.h
+++ ps/trunk/source/gui/CGUISprite.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2015 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -161,6 +161,7 @@
 	CGUISpriteInstance();
 	CGUISpriteInstance(const CStr& SpriteName);
 	CGUISpriteInstance(const CGUISpriteInstance& Sprite);
+	CGUISpriteInstance& operator=(const CGUISpriteInstance&);
 	CGUISpriteInstance& operator=(const CStr& SpriteName);
 	void Draw(CRect Size, int CellID, std::map<CStr, CGUISprite*>& Sprites, float Z) const;
 	void Invalidate();
Index: ps/trunk/source/gui/CGUISprite.cpp
===================================================================
--- ps/trunk/source/gui/CGUISprite.cpp
+++ ps/trunk/source/gui/CGUISprite.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2015 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -71,6 +71,11 @@
 {
 }
 
+CGUISpriteInstance& CGUISpriteInstance::operator=(const CGUISpriteInstance& Sprite)
+{
+	return this->operator=(Sprite.m_SpriteName);
+}
+
 CGUISpriteInstance& CGUISpriteInstance::operator=(const CStr& SpriteName)
 {
 	m_SpriteName = SpriteName;
Index: ps/trunk/source/lib/path.h
===================================================================
--- ps/trunk/source/lib/path.h
+++ ps/trunk/source/lib/path.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2017 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -84,6 +84,12 @@
 		DetectSeparator();
 	}
 
+	Path(const Path& p)
+		: path(p.path)
+	{
+		DetectSeparator();
+	}
+
 	Path(const char* p)
 		: path((const unsigned char*)p, (const unsigned char*)p+strlen(p))
 		// interpret bytes as unsigned; makes no difference for ASCII,
Index: ps/trunk/source/ps/Shapes.h
===================================================================
--- ps/trunk/source/ps/Shapes.h
+++ ps/trunk/source/ps/Shapes.h
@@ -43,6 +43,7 @@
 	CRect(const CPos &upperleft, const CPos &bottomright);
 	CRect(const CPos &pos, const CSize &size);
 	CRect(const float l, const float t, const float r, const float b);
+	CRect(const CRect&);
 
 	CRect& operator=(const CRect& a);
 	bool operator==(const CRect& a) const;
@@ -133,6 +134,7 @@
 {
 public:
 	CPos();
+	CPos(const CPos& pos);
 	CPos(const CSize &pos);
 	CPos(const float px, const float py);
 
@@ -172,6 +174,7 @@
 	CSize();
 	CSize(const CRect &rect);
 	CSize(const CPos &pos);
+	CSize(const CSize& size);
 	CSize(const float sx, const float sy);
 
 	CSize& operator=(const CSize& a);
Index: ps/trunk/source/ps/Shapes.cpp
===================================================================
--- ps/trunk/source/ps/Shapes.cpp
+++ ps/trunk/source/ps/Shapes.cpp
@@ -24,6 +24,11 @@
 {
 }
 
+CRect::CRect(const CRect& rect) :
+	left(rect.left), top(rect.top), right(rect.right), bottom(rect.bottom)
+{
+}
+
 CRect::CRect(const CPos &pos) :
 	left(pos.x), top(pos.y), right(pos.x), bottom(pos.y)
 {
@@ -218,6 +223,10 @@
 {
 }
 
+CPos::CPos(const CPos& pos) : x(pos.x), y(pos.y)
+{
+}
+
 CPos::CPos(const CSize& s) : x(s.cx), y(s.cy)
 {
 }
@@ -303,6 +312,10 @@
 {
 }
 
+CSize::CSize(const CSize& size) : cx(size.cx), cy(size.cy)
+{
+}
+
 CSize::CSize(const CRect &rect) : cx(rect.GetWidth()), cy(rect.GetHeight())
 {
 }
Index: ps/trunk/source/simulation2/components/CCmpProjectileManager.cpp
===================================================================
--- ps/trunk/source/simulation2/components/CCmpProjectileManager.cpp
+++ ps/trunk/source/simulation2/components/CCmpProjectileManager.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2017 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -114,7 +114,7 @@
 	virtual void RemoveProjectile(uint32_t);
 
 	void RenderModel(CModelAbstract& model, const CVector3D& position, SceneCollector& collector, const CFrustum& frustum, bool culling,
-		ICmpRangeManager::CLosQuerier los, bool losRevealAll) const;
+		const ICmpRangeManager::CLosQuerier& los, bool losRevealAll) const;
 
 private:
 	struct Projectile
@@ -358,7 +358,7 @@
 }
 
 void CCmpProjectileManager::RenderModel(CModelAbstract& model, const CVector3D& position, SceneCollector& collector,
-	const CFrustum& frustum, bool culling, ICmpRangeManager::CLosQuerier los, bool losRevealAll) const
+	const CFrustum& frustum, bool culling, const ICmpRangeManager::CLosQuerier& los, bool losRevealAll) const
 {
 	// Don't display objects outside the visible area
 	ssize_t posi = (ssize_t)(0.5f + position.X / TERRAIN_TILE_SIZE);
Index: ps/trunk/source/simulation2/tests/test_Serializer.h
===================================================================
--- ps/trunk/source/simulation2/tests/test_Serializer.h
+++ ps/trunk/source/simulation2/tests/test_Serializer.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2017 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -283,8 +283,8 @@
 		CDebugSerializer serialize(script, stream);
 		serialize.NumberI32("x", 16, -16, 16);
 		serialize.NumberI32("x", -16, -16, 16);
-		TS_ASSERT_THROWS(serialize.NumberI32("x", 17, -16, 16), PSERROR_Serialize_OutOfBounds);
-		TS_ASSERT_THROWS(serialize.NumberI32("x", -17, -16, 16), PSERROR_Serialize_OutOfBounds);
+		TS_ASSERT_THROWS(serialize.NumberI32("x", 99, -16, 16), const PSERROR_Serialize_OutOfBounds&);
+		TS_ASSERT_THROWS(serialize.NumberI32("x", -17, -16, 16), const PSERROR_Serialize_OutOfBounds&);
 	}
 
 	// TODO: test exceptions more thoroughly
@@ -766,7 +766,7 @@
 		TestLogger logger;
 
 		TS_ASSERT(script.Eval("([1, 2, function () { }])", &obj));
-		TS_ASSERT_THROWS(serialize.ScriptVal("script", &obj), PSERROR_Serialize_InvalidScriptValue);
+		TS_ASSERT_THROWS(serialize.ScriptVal("script", &obj), const PSERROR_Serialize_InvalidScriptValue&);
 	}
 
 	void test_script_splice()
Index: ps/trunk/source/tools/atlas/AtlasObject/AtlasObject.h
===================================================================
--- ps/trunk/source/tools/atlas/AtlasObject/AtlasObject.h
+++ ps/trunk/source/tools/atlas/AtlasObject/AtlasObject.h
@@ -131,6 +131,11 @@
 public:
 	AtObj() {}
 	AtObj(const AtObj& r) : m_Node(r.m_Node) {}
+	AtObj& operator=(const AtObj& r)
+	{
+		m_Node = r.m_Node;
+		return *this;
+	}
 
 	// Return an iterator to the children matching 'key'
 	const AtIter operator[] (const char* key) const;
Index: ps/trunk/source/tools/atlas/GameInterface/Handlers/TerrainHandlers.cpp
===================================================================
--- ps/trunk/source/tools/atlas/GameInterface/Handlers/TerrainHandlers.cpp
+++ ps/trunk/source/tools/atlas/GameInterface/Handlers/TerrainHandlers.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2012 Wildfire Games.
+/* Copyright (C) 2019 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -175,8 +175,9 @@
 	}
 	else
 	{
-		sTerrainTexturePreview noPreview;
+		sTerrainTexturePreview noPreview{};
 		noPreview.name = std::wstring();
+		noPreview.loaded = false;
 		noPreview.imageHeight = 0;
 		noPreview.imageWidth = 0;
 		msg->preview = noPreview;
Index: ps/trunk/source/tools/atlas/GameInterface/MessagesSetup.h
===================================================================
--- ps/trunk/source/tools/atlas/GameInterface/MessagesSetup.h
+++ ps/trunk/source/tools/atlas/GameInterface/MessagesSetup.h
@@ -91,7 +91,7 @@
 #define COMMANDDATASTRUCT(t) \
 	struct d##t { \
 	private: \
-		const d##t& operator=(const d##t&); \
+		d##t& operator=(const d##t&) = delete; \
 	public:
 
 #define COMMANDSTRUCT(t, merge) \