Fix many asan and ubsan reported issues

This allows most demos to run without any ubsan or asan errors. There
are still some things in thirdpart/ and some things in AudioServer that
needs a look but this fixes a lot of issues. This should help debug less
obvious issues, hopefully.

This fixes #25217 and fixes #25218

16 files changed, 198 insertions, 131 deletions

diff --git a/core/pair.h b/core/pair.h
index cb661160b5..9afaa726cb 100644
--- a/core/pair.h
+++ b/core/pair.h
@@ -37,7 +37,11 @@ struct Pair {
 	F first;
 	S second;
 
-	Pair() {}
+	Pair() :
+			first(),
+			second() {
+	}
+
 	Pair(F p_first, const S &p_second) :
 			first(p_first),
 			second(p_second) {
diff --git a/core/variant.cpp b/core/variant.cpp
index 56b272cccf..2ee2e8e293 100644
--- a/core/variant.cpp
+++ b/core/variant.cpp
@@ -2816,27 +2816,37 @@ uint32_t Variant::hash() const {
 
 			const PoolVector<uint8_t> &arr = *reinterpret_cast<const PoolVector<uint8_t> *>(_data._mem);
 			int len = arr.size();
-			PoolVector<uint8_t>::Read r = arr.read();
-
-			return hash_djb2_buffer((uint8_t *)&r[0], len);
+			if (likely(len)) {
+				PoolVector<uint8_t>::Read r = arr.read();
+				return hash_djb2_buffer((uint8_t *)&r[0], len);
+			} else {
+				return hash_djb2_one_64(0);
+			}
 
 		} break;
 		case POOL_INT_ARRAY: {
 
 			const PoolVector<int> &arr = *reinterpret_cast<const PoolVector<int> *>(_data._mem);
 			int len = arr.size();
-			PoolVector<int>::Read r = arr.read();
-
-			return hash_djb2_buffer((uint8_t *)&r[0], len * sizeof(int));
+			if (likely(len)) {
+				PoolVector<int>::Read r = arr.read();
+				return hash_djb2_buffer((uint8_t *)&r[0], len * sizeof(int));
+			} else {
+				return hash_djb2_one_64(0);
+			}
 
 		} break;
 		case POOL_REAL_ARRAY: {
 
 			const PoolVector<real_t> &arr = *reinterpret_cast<const PoolVector<real_t> *>(_data._mem);
 			int len = arr.size();
-			PoolVector<real_t>::Read r = arr.read();
 
-			return hash_djb2_buffer((uint8_t *)&r[0], len * sizeof(real_t));
+			if (likely(len)) {
+				PoolVector<real_t>::Read r = arr.read();
+				return hash_djb2_buffer((uint8_t *)&r[0], len * sizeof(real_t));
+			} else {
+				return hash_djb2_one_float(0.0);
+			}
 
 		} break;
 		case POOL_STRING_ARRAY: {
@@ -2844,10 +2854,13 @@ uint32_t Variant::hash() const {
 			uint32_t hash = 5831;
 			const PoolVector<String> &arr = *reinterpret_cast<const PoolVector<String> *>(_data._mem);
 			int len = arr.size();
-			PoolVector<String>::Read r = arr.read();
 
-			for (int i = 0; i < len; i++) {
-				hash = hash_djb2_one_32(r[i].hash(), hash);
+			if (likely(len)) {
+				PoolVector<String>::Read r = arr.read();
+
+				for (int i = 0; i < len; i++) {
+					hash = hash_djb2_one_32(r[i].hash(), hash);
+				}
 			}
 
 			return hash;
@@ -2857,48 +2870,54 @@ uint32_t Variant::hash() const {
 			uint32_t hash = 5831;
 			const PoolVector<Vector2> &arr = *reinterpret_cast<const PoolVector<Vector2> *>(_data._mem);
 			int len = arr.size();
-			PoolVector<Vector2>::Read r = arr.read();
 
-			for (int i = 0; i < len; i++) {
-				hash = hash_djb2_one_float(r[i].x, hash);
-				hash = hash_djb2_one_float(r[i].y, hash);
+			if (likely(len)) {
+				PoolVector<Vector2>::Read r = arr.read();
+
+				for (int i = 0; i < len; i++) {
+					hash = hash_djb2_one_float(r[i].x, hash);
+					hash = hash_djb2_one_float(r[i].y, hash);
+				}
 			}
 
 			return hash;
-
 		} break;
 		case POOL_VECTOR3_ARRAY: {
 
 			uint32_t hash = 5831;
 			const PoolVector<Vector3> &arr = *reinterpret_cast<const PoolVector<Vector3> *>(_data._mem);
 			int len = arr.size();
-			PoolVector<Vector3>::Read r = arr.read();
 
-			for (int i = 0; i < len; i++) {
-				hash = hash_djb2_one_float(r[i].x, hash);
-				hash = hash_djb2_one_float(r[i].y, hash);
-				hash = hash_djb2_one_float(r[i].z, hash);
+			if (likely(len)) {
+				PoolVector<Vector3>::Read r = arr.read();
+
+				for (int i = 0; i < len; i++) {
+					hash = hash_djb2_one_float(r[i].x, hash);
+					hash = hash_djb2_one_float(r[i].y, hash);
+					hash = hash_djb2_one_float(r[i].z, hash);
+				}
 			}
 
 			return hash;
-
 		} break;
 		case POOL_COLOR_ARRAY: {
 
 			uint32_t hash = 5831;
 			const PoolVector<Color> &arr = *reinterpret_cast<const PoolVector<Color> *>(_data._mem);
 			int len = arr.size();
-			PoolVector<Color>::Read r = arr.read();
 
-			for (int i = 0; i < len; i++) {
-				hash = hash_djb2_one_float(r[i].r, hash);
-				hash = hash_djb2_one_float(r[i].g, hash);
-				hash = hash_djb2_one_float(r[i].b, hash);
-				hash = hash_djb2_one_float(r[i].a, hash);
+			if (likely(len)) {
+				PoolVector<Color>::Read r = arr.read();
+
+				for (int i = 0; i < len; i++) {
+					hash = hash_djb2_one_float(r[i].r, hash);
+					hash = hash_djb2_one_float(r[i].g, hash);
+					hash = hash_djb2_one_float(r[i].b, hash);
+					hash = hash_djb2_one_float(r[i].a, hash);
+				}
 			}
 
 			return hash;
-
 		} break;
 		default: {}
 	}
diff --git a/drivers/gles2/shader_compiler_gles2.cpp b/drivers/gles2/shader_compiler_gles2.cpp
index fa1242ceed..d6e8edc421 100644
--- a/drivers/gles2/shader_compiler_gles2.cpp
+++ b/drivers/gles2/shader_compiler_gles2.cpp
@@ -318,7 +318,7 @@ String ShaderCompilerGLES2::_dump_node_code(SL::Node *p_node, int p_level, Gener
 
 				uniform_code += "uniform ";
 
-				uniform_code += _prestr(E->get().precission);
+				uniform_code += _prestr(E->get().precision);
 				uniform_code += _typestr(E->get().type);
 				uniform_code += " ";
 				uniform_code += _mkid(E->key());
@@ -344,7 +344,7 @@ String ShaderCompilerGLES2::_dump_node_code(SL::Node *p_node, int p_level, Gener
 				StringBuffer<> varying_code;
 
 				varying_code += "varying ";
-				varying_code += _prestr(E->get().precission);
+				varying_code += _prestr(E->get().precision);
 				varying_code += _typestr(E->get().type);
 				varying_code += " ";
 				varying_code += _mkid(E->key());
diff --git a/drivers/gles3/shader_compiler_gles3.cpp b/drivers/gles3/shader_compiler_gles3.cpp
index 4d6f37e093..da54f7a2af 100644
--- a/drivers/gles3/shader_compiler_gles3.cpp
+++ b/drivers/gles3/shader_compiler_gles3.cpp
@@ -373,7 +373,7 @@ String ShaderCompilerGLES3::_dump_node_code(SL::Node *p_node, int p_level, Gener
 					ucode = "uniform ";
 				}
 
-				ucode += _prestr(E->get().precission);
+				ucode += _prestr(E->get().precision);
 				ucode += _typestr(E->get().type);
 				ucode += " " + _mkid(E->key());
 				ucode += ";\n";
@@ -464,7 +464,7 @@ String ShaderCompilerGLES3::_dump_node_code(SL::Node *p_node, int p_level, Gener
 
 				String vcode;
 				String interp_mode = _interpstr(E->get().interpolation);
-				vcode += _prestr(E->get().precission);
+				vcode += _prestr(E->get().precision);
 				vcode += _typestr(E->get().type);
 				vcode += " " + _mkid(E->key());
 				vcode += ";\n";
diff --git a/main/tests/test_shader_lang.cpp b/main/tests/test_shader_lang.cpp
index ebaf7fd602..8441748cc0 100644
--- a/main/tests/test_shader_lang.cpp
+++ b/main/tests/test_shader_lang.cpp
@@ -110,7 +110,7 @@ static String dump_node_code(SL::Node *p_node, int p_level) {
 			for (Map<StringName, SL::ShaderNode::Uniform>::Element *E = pnode->uniforms.front(); E; E = E->next()) {
 
 				String ucode = "uniform ";
-				ucode += _prestr(E->get().precission);
+				ucode += _prestr(E->get().precision);
 				ucode += _typestr(E->get().type);
 				ucode += " " + String(E->key());
 
@@ -137,7 +137,7 @@ static String dump_node_code(SL::Node *p_node, int p_level) {
 			for (Map<StringName, SL::ShaderNode::Varying>::Element *E = pnode->varyings.front(); E; E = E->next()) {
 
 				String vcode = "varying ";
-				vcode += _prestr(E->get().precission);
+				vcode += _prestr(E->get().precision);
 				vcode += _typestr(E->get().type);
 				vcode += " " + String(E->key());
 
diff --git a/modules/bullet/collision_object_bullet.cpp b/modules/bullet/collision_object_bullet.cpp
index 91a5ed095a..ef5f21fc21 100644
--- a/modules/bullet/collision_object_bullet.cpp
+++ b/modules/bullet/collision_object_bullet.cpp
@@ -69,8 +69,12 @@ void CollisionObjectBullet::ShapeWrapper::claim_bt_shape(const btVector3 &body_s
 CollisionObjectBullet::CollisionObjectBullet(Type p_type) :
 		RIDBullet(),
 		type(p_type),
+		instance_id(0),
+		collisionLayer(0),
+		collisionMask(0),
 		collisionsEnabled(true),
 		m_isStatic(false),
+		ray_pickable(false),
 		bt_collision_object(NULL),
 		body_scale(1., 1., 1.),
 		force_shape_reset(false),
diff --git a/modules/gdscript/gdscript_editor.cpp b/modules/gdscript/gdscript_editor.cpp
index 08ad101967..3daa006353 100644
--- a/modules/gdscript/gdscript_editor.cpp
+++ b/modules/gdscript/gdscript_editor.cpp
@@ -615,6 +615,9 @@ static GDScriptCompletionIdentifier _type_from_gdtype(const GDScriptDataType &p_
 	ci.type.script_type = p_gdtype.script_type;
 
 	switch (p_gdtype.kind) {
+		case GDScriptDataType::UNINITIALIZED: {
+			ERR_EXPLAIN("Uninitialized completion. Please report a bug.");
+		} break;
 		case GDScriptDataType::BUILTIN: {
 			ci.type.kind = GDScriptParser::DataType::BUILTIN;
 		} break;
diff --git a/modules/gdscript/gdscript_function.h b/modules/gdscript/gdscript_function.h
index f4058664ff..a412b2950f 100644
--- a/modules/gdscript/gdscript_function.h
+++ b/modules/gdscript/gdscript_function.h
@@ -45,10 +45,11 @@ class GDScript;
 struct GDScriptDataType {
 	bool has_type;
 	enum {
+		UNINITIALIZED,
 		BUILTIN,
 		NATIVE,
 		SCRIPT,
-		GDSCRIPT
+		GDSCRIPT,
 	} kind;
 	Variant::Type builtin_type;
 	StringName native_type;
@@ -58,6 +59,8 @@ struct GDScriptDataType {
 		if (!has_type) return true; // Can't type check
 
 		switch (kind) {
+			case UNINITIALIZED:
+				break;
 			case BUILTIN: {
 				Variant::Type var_type = p_variant.get_type();
 				bool valid = builtin_type == var_type;
@@ -113,6 +116,8 @@ struct GDScriptDataType {
 		PropertyInfo info;
 		if (has_type) {
 			switch (kind) {
+				case UNINITIALIZED:
+					break;
 				case BUILTIN: {
 					info.type = builtin_type;
 				} break;
@@ -134,7 +139,9 @@ struct GDScriptDataType {
 	}
 
 	GDScriptDataType() :
-			has_type(false) {}
+			has_type(false),
+			kind(UNINITIALIZED),
+			builtin_type(Variant::NIL) {}
 };
 
 class GDScriptFunction {
diff --git a/modules/gdscript/gdscript_parser.cpp b/modules/gdscript/gdscript_parser.cpp
index af189fdb7e..77ae17e573 100644
--- a/modules/gdscript/gdscript_parser.cpp
+++ b/modules/gdscript/gdscript_parser.cpp
@@ -4553,6 +4553,7 @@ void GDScriptParser::_parse_class(ClassNode *p_class) {
 				//variale declaration and (eventual) initialization
 
 				ClassNode::Member member;
+
 				bool autoexport = tokenizer->get_token(-1) == GDScriptTokenizer::TK_PR_EXPORT;
 				if (current_export.type != Variant::NIL) {
 					member._export = current_export;
@@ -5594,6 +5595,9 @@ GDScriptParser::DataType GDScriptParser::_type_from_gdtype(const GDScriptDataTyp
 	result.script_type = p_gdtype.script_type;
 
 	switch (p_gdtype.kind) {
+		case GDScriptDataType::UNINITIALIZED: {
+			ERR_EXPLAIN("Uninitialized datatype. Please report a bug.");
+		} break;
 		case GDScriptDataType::BUILTIN: {
 			result.kind = DataType::BUILTIN;
 		} break;
diff --git a/modules/gdscript/gdscript_parser.h b/modules/gdscript/gdscript_parser.h
index b4a705c9e7..d1ddf9aa12 100644
--- a/modules/gdscript/gdscript_parser.h
+++ b/modules/gdscript/gdscript_parser.h
@@ -95,6 +95,7 @@ public:
 		}
 
 		DataType() :
+				kind(UNRESOLVED),
 				has_type(false),
 				is_constant(false),
 				is_meta_type(false),
@@ -168,6 +169,7 @@ public:
 			MultiplayerAPI::RPCMode rpc_mode;
 			int usages;
 		};
+
 		struct Constant {
 			Node *expression;
 			DataType type;
diff --git a/platform/x11/os_x11.cpp b/platform/x11/os_x11.cpp
index e0924fc982..ca4b02bb49 100644
--- a/platform/x11/os_x11.cpp
+++ b/platform/x11/os_x11.cpp
@@ -3004,7 +3004,9 @@ bool OS_X11::is_vsync_enabled() const {
 */
 void OS_X11::set_context(int p_context) {
 
+	char *config_name = NULL;
 	XClassHint *classHint = XAllocClassHint();
+
 	if (classHint) {
 
 		char *wm_class = (char *)"Godot";
@@ -3015,13 +3017,15 @@ void OS_X11::set_context(int p_context) {
 
 		if (p_context == CONTEXT_ENGINE) {
 			classHint->res_name = (char *)"Godot_Engine";
-			wm_class = (char *)((String)GLOBAL_GET("application/config/name")).utf8().ptrw();
+			config_name = strdup((char *)((String)GLOBAL_GET("application/config/name")).utf8().ptrw());
+			wm_class = config_name;
 		}
 
 		classHint->res_class = wm_class;
 
 		XSetClassHint(x11_display, x11_window, classHint);
 		XFree(classHint);
+		free(config_name);
 	}
 }
 
diff --git a/scene/animation/animation_player.h b/scene/animation/animation_player.h
index 175072edcf..9bba848298 100644
--- a/scene/animation/animation_player.h
+++ b/scene/animation/animation_player.h
@@ -114,10 +114,12 @@ private:
 			Variant value_accum;
 			uint64_t accum_pass;
 			Variant capture;
-			PropertyAnim() {
-				accum_pass = 0;
-				object = NULL;
-			}
+
+			PropertyAnim() :
+					owner(NULL),
+					special(SP_NONE),
+					object(NULL),
+					accum_pass(0) {}
 		};
 
 		Map<StringName, PropertyAnim> property_anim;
@@ -129,25 +131,28 @@ private:
 			float bezier_accum;
 			Object *object;
 			uint64_t accum_pass;
-			BezierAnim() {
-				accum_pass = 0;
-				bezier_accum = 0;
-				object = NULL;
-			}
+
+			BezierAnim() :
+					owner(NULL),
+					bezier_accum(0.0),
+					object(NULL),
+					accum_pass(0) {}
 		};
 
 		Map<StringName, BezierAnim> bezier_anim;
 
-		TrackNodeCache() {
-			skeleton = NULL;
-			spatial = NULL;
-			node = NULL;
-			accum_pass = 0;
-			bone_idx = -1;
-			node_2d = NULL;
-			audio_playing = false;
-			animation_playing = false;
-		}
+		TrackNodeCache() :
+				id(0),
+				node(NULL),
+				spatial(NULL),
+				node_2d(NULL),
+				skeleton(NULL),
+				bone_idx(-1),
+				accum_pass(0),
+				audio_playing(false),
+				audio_start(0.0),
+				audio_len(0.0),
+				animation_playing(false) {}
 	};
 
 	struct TrackNodeCacheKey {
diff --git a/scene/animation/animation_tree_player.h b/scene/animation/animation_tree_player.h
index 12e514f7d5..9ec6325969 100644
--- a/scene/animation/animation_tree_player.h
+++ b/scene/animation/animation_tree_player.h
@@ -109,6 +109,14 @@ private:
 		Variant value;
 
 		bool skip;
+
+		Track() :
+				id(0),
+				object(NULL),
+				spatial(NULL),
+				skeleton(NULL),
+				bone_idx(-1),
+				skip(false) {}
 	};
 
 	typedef Map<TrackKey, Track> TrackMap;
diff --git a/scene/resources/environment.cpp b/scene/resources/environment.cpp
index a57b7bbb42..d09ac0ee6c 100644
--- a/scene/resources/environment.cpp
+++ b/scene/resources/environment.cpp
@@ -1291,7 +1291,14 @@ void Environment::_bind_methods() {
 	BIND_ENUM_CONSTANT(SSAO_QUALITY_HIGH);
 }
 
-Environment::Environment() {
+Environment::Environment() :
+		bg_mode(BG_CLEAR_COLOR),
+		tone_mapper(TONE_MAPPER_LINEAR),
+		ssao_blur(SSAO_BLUR_DISABLED),
+		ssao_quality(SSAO_QUALITY_LOW),
+		glow_blend_mode(GLOW_BLEND_MODE_ADDITIVE),
+		dof_blur_far_quality(DOF_BLUR_QUALITY_LOW),
+		dof_blur_near_quality(DOF_BLUR_QUALITY_LOW) {
 
 	environment = VS::get_singleton()->environment_create();
 
diff --git a/servers/visual/shader_language.cpp b/servers/visual/shader_language.cpp
index c2dae7c2d5..404686a31c 100644
--- a/servers/visual/shader_language.cpp
+++ b/servers/visual/shader_language.cpp
@@ -4113,7 +4113,7 @@ Error ShaderLanguage::_parse_shader(const Map<StringName, FunctionInfo> &p_funct
 						uniform.order = uniforms++;
 					}
 					uniform.type = type;
-					uniform.precission = precision;
+					uniform.precision = precision;
 
 					//todo parse default value
 
@@ -4264,7 +4264,7 @@ Error ShaderLanguage::_parse_shader(const Map<StringName, FunctionInfo> &p_funct
 
 					ShaderNode::Varying varying;
 					varying.type = type;
-					varying.precission = precision;
+					varying.precision = precision;
 					varying.interpolation = interpolation;
 					shader->varyings[name] = varying;
 
diff --git a/servers/visual/shader_language.h b/servers/visual/shader_language.h
index b908f9539b..185bad4222 100644
--- a/servers/visual/shader_language.h
+++ b/servers/visual/shader_language.h
@@ -42,7 +42,6 @@ class ShaderLanguage {
 
 public:
 	enum TokenType {
-
 		TK_EMPTY,
 		TK_IDENTIFIER,
 		TK_TRUE,
@@ -267,18 +266,15 @@ public:
 		FLOW_OP_SWITCH,
 		FLOW_OP_CONTINUE,
 		FLOW_OP_DISCARD
-
 	};
 
 	enum ArgumentQualifier {
 		ARGUMENT_QUALIFIER_IN,
 		ARGUMENT_QUALIFIER_OUT,
 		ARGUMENT_QUALIFIER_INOUT,
-
 	};
 
 	struct Node {
-
 		Node *next;
 
 		enum Type {
@@ -296,7 +292,9 @@ public:
 		Type type;
 
 		virtual DataType get_datatype() const { return TYPE_VOID; }
-
+		Node(Type t) :
+				next(NULL),
+				type(t) {}
 		virtual ~Node() {}
 	};
 
@@ -311,18 +309,17 @@ public:
 	Node *nodes;
 
 	struct OperatorNode : public Node {
-
 		DataType return_cache;
 		DataPrecision return_precision_cache;
 		Operator op;
 		Vector<Node *> arguments;
 		virtual DataType get_datatype() const { return return_cache; }
 
-		OperatorNode() {
-			type = TYPE_OPERATOR;
-			return_cache = TYPE_VOID;
-			return_precision_cache = PRECISION_DEFAULT;
-		}
+		OperatorNode() :
+				Node(TYPE_OPERATOR),
+				return_cache(TYPE_VOID),
+				return_precision_cache(PRECISION_DEFAULT),
+				op(OP_EQUAL) {}
 	};
 
 	struct VariableNode : public Node {
@@ -330,20 +327,16 @@ public:
 		StringName name;
 		virtual DataType get_datatype() const { return datatype_cache; }
 
-		VariableNode() {
-
-			type = TYPE_VARIABLE;
-			datatype_cache = TYPE_VOID;
-		}
+		VariableNode() :
+				Node(TYPE_VARIABLE),
+				datatype_cache(TYPE_VOID) {}
 	};
 
 	struct VariableDeclarationNode : public Node {
-
 		DataPrecision precision;
 		DataType datatype;
 
 		struct Declaration {
-
 			StringName name;
 			Node *initializer;
 		};
@@ -351,13 +344,13 @@ public:
 		Vector<Declaration> declarations;
 		virtual DataType get_datatype() const { return datatype; }
 
-		VariableDeclarationNode() {
-			type = TYPE_VARIABLE_DECLARATION;
-		}
+		VariableDeclarationNode() :
+				Node(TYPE_VARIABLE_DECLARATION),
+				precision(PRECISION_DEFAULT),
+				datatype(TYPE_VOID) {}
 	};
 
 	struct ConstantNode : public Node {
-
 		DataType datatype;
 
 		union Value {
@@ -370,7 +363,9 @@ public:
 		Vector<Value> values;
 		virtual DataType get_datatype() const { return datatype; }
 
-		ConstantNode() { type = TYPE_CONSTANT; }
+		ConstantNode() :
+				Node(TYPE_CONSTANT),
+				datatype(TYPE_VOID) {}
 	};
 
 	struct FunctionNode;
@@ -388,39 +383,41 @@ public:
 		Map<StringName, Variable> variables;
 		List<Node *> statements;
 		bool single_statement;
-		BlockNode() {
-			type = TYPE_BLOCK;
-			parent_block = NULL;
-			parent_function = NULL;
-			single_statement = false;
-		}
+
+		BlockNode() :
+				Node(TYPE_BLOCK),
+				parent_function(NULL),
+				parent_block(NULL),
+				single_statement(false) {}
 	};
 
 	struct ControlFlowNode : public Node {
-
 		FlowOperation flow_op;
 		Vector<Node *> expressions;
 		Vector<BlockNode *> blocks;
-		ControlFlowNode() {
-			type = TYPE_CONTROL_FLOW;
-			flow_op = FLOW_OP_IF;
-		}
+
+		ControlFlowNode() :
+				Node(TYPE_CONTROL_FLOW),
+				flow_op(FLOW_OP_IF) {}
 	};
 
 	struct MemberNode : public Node {
-
 		DataType basetype;
 		DataType datatype;
 		StringName name;
 		Node *owner;
+
 		virtual DataType get_datatype() const { return datatype; }
-		MemberNode() { type = TYPE_MEMBER; }
+
+		MemberNode() :
+				Node(TYPE_MEMBER),
+				basetype(TYPE_VOID),
+				datatype(TYPE_VOID),
+				owner(NULL) {}
 	};
 
 	struct FunctionNode : public Node {
-
 		struct Argument {
-
 			ArgumentQualifier qualifier;
 			StringName name;
 			DataType type;
@@ -434,16 +431,15 @@ public:
 		BlockNode *body;
 		bool can_discard;
 
-		FunctionNode() {
-			type = TYPE_FUNCTION;
-			return_type = TYPE_VOID;
-			return_precision = PRECISION_DEFAULT;
-			can_discard = false;
-		}
+		FunctionNode() :
+				Node(TYPE_FUNCTION),
+				return_type(TYPE_VOID),
+				return_precision(PRECISION_DEFAULT),
+				body(NULL),
+				can_discard(false) {}
 	};
 
 	struct ShaderNode : public Node {
-
 		struct Function {
 			StringName name;
 			FunctionNode *function;
@@ -454,7 +450,12 @@ public:
 		struct Varying {
 			DataType type;
 			DataInterpolation interpolation;
-			DataPrecision precission;
+			DataPrecision precision;
+
+			Varying() :
+					type(TYPE_VOID),
+					interpolation(INTERPOLATION_FLAT),
+					precision(PRECISION_DEFAULT) {}
 		};
 
 		struct Uniform {
@@ -474,16 +475,20 @@ public:
 			int order;
 			int texture_order;
 			DataType type;
-			DataPrecision precission;
+			DataPrecision precision;
 			Vector<ConstantNode::Value> default_value;
 			Hint hint;
 			float hint_range[3];
 
-			Uniform() {
-				hint = HINT_NONE;
-				hint_range[0] = 0;
-				hint_range[1] = 1;
-				hint_range[2] = 0.001;
+			Uniform() :
+					order(0),
+					texture_order(0),
+					type(TYPE_VOID),
+					precision(PRECISION_DEFAULT),
+					hint(HINT_NONE) {
+				hint_range[0] = 0.0f;
+				hint_range[1] = 1.0f;
+				hint_range[2] = 0.001f;
 			}
 		};
 
@@ -493,11 +498,11 @@ public:
 
 		Vector<Function> functions;
 
-		ShaderNode() { type = TYPE_SHADER; }
+		ShaderNode() :
+				Node(TYPE_SHADER) {}
 	};
 
 	struct Expression {
-
 		bool is_op;
 		union {
 			Operator op;
@@ -506,7 +511,6 @@ public:
 	};
 
 	struct VarInfo {
-
 		StringName name;
 		DataType type;
 	};
@@ -522,7 +526,6 @@ public:
 	};
 
 	struct Token {
-
 		TokenType type;
 		StringName text;
 		double constant;
@@ -556,11 +559,14 @@ public:
 	struct BuiltInInfo {
 		DataType type;
 		bool constant;
-		BuiltInInfo() {}
-		BuiltInInfo(DataType p_type, bool p_constant = false) {
-			type = p_type;
-			constant = p_constant;
-		}
+
+		BuiltInInfo() :
+				type(TYPE_VOID),
+				constant(false) {}
+
+		BuiltInInfo(DataType p_type, bool p_constant = false) :
+				type(p_type),
+				constant(p_constant) {}
 	};
 
 	struct FunctionInfo {
@@ -573,6 +579,7 @@ private:
 		TokenType token;
 		const char *text;
 	};
+
 	static const KeyWord keyword_list[];
 
 	bool error_set;
@@ -628,14 +635,11 @@ private:
 	};
 
 	bool _find_identifier(const BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, const StringName &p_identifier, DataType *r_data_type = NULL, IdentifierType *r_type = NULL);
-
 	bool _is_operator_assign(Operator p_op) const;
 	bool _validate_assign(Node *p_node, const Map<StringName, BuiltInInfo> &p_builtin_types, String *r_message = NULL);
-
 	bool _validate_operator(OperatorNode *p_op, DataType *r_ret_type = NULL);
 
 	struct BuiltinFuncDef {
-
 		enum { MAX_ARGS = 5 };
 		const char *name;
 		DataType rettype;
@@ -643,7 +647,6 @@ private:
 	};
 
 	struct BuiltinFuncOutArgs { //arguments used as out in built in funcions
-
 		const char *name;
 		int argument;
 	};
@@ -656,20 +659,17 @@ private:
 	int completion_argument;
 
 	bool _get_completable_identifier(BlockNode *p_block, CompletionType p_type, StringName &identifier);
-
 	static const BuiltinFuncDef builtin_func_defs[];
 	static const BuiltinFuncOutArgs builtin_func_out_args[];
-	bool _validate_function_call(BlockNode *p_block, OperatorNode *p_func, DataType *r_ret_type);
 
+	bool _validate_function_call(BlockNode *p_block, OperatorNode *p_func, DataType *r_ret_type);
 	bool _parse_function_arguments(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, OperatorNode *p_func, int *r_complete_arg = NULL);
 
 	Node *_parse_expression(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types);
-
 	ShaderLanguage::Node *_reduce_expression(BlockNode *p_block, ShaderLanguage::Node *p_node);
-	Node *_parse_and_reduce_expression(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types);
 
+	Node *_parse_and_reduce_expression(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types);
 	Error _parse_block(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, bool p_just_one = false, bool p_can_break = false, bool p_can_continue = false);
-
 	Error _parse_shader(const Map<StringName, FunctionInfo> &p_functions, const Vector<StringName> &p_render_modes, const Set<String> &p_shader_types);
 
 public: