Merge pull request #29941 from qarmin/redundant_code_and_others

Remove redundant code, possible NULL pointers and others

31 files changed, 74 insertions, 103 deletions

diff --git a/core/bind/core_bind.cpp b/core/bind/core_bind.cpp
index b6591a4901..44573a0d97 100644
--- a/core/bind/core_bind.cpp
+++ b/core/bind/core_bind.cpp
@@ -76,7 +76,7 @@ RES _ResourceLoader::load(const String &p_path, const String &p_type_hint, bool
 
 	if (err != OK) {
 		ERR_EXPLAIN("Error loading resource: '" + p_path + "'");
-		ERR_FAIL_COND_V(err != OK, ret);
+		ERR_FAIL_V(ret);
 	}
 	return ret;
 }
diff --git a/core/class_db.cpp b/core/class_db.cpp
index ec07ee98e2..c9527e3c8f 100644
--- a/core/class_db.cpp
+++ b/core/class_db.cpp
@@ -552,7 +552,7 @@ void ClassDB::_add_class2(const StringName &p_class, const StringName &p_inherit
 
 	OBJTYPE_WLOCK;
 
-	StringName name = p_class;
+	const StringName &name = p_class;
 
 	ERR_FAIL_COND(classes.has(name));
 
diff --git a/core/color.h b/core/color.h
index b2148e1357..77f95b5dc9 100644
--- a/core/color.h
+++ b/core/color.h
@@ -195,7 +195,7 @@ struct Color {
 	static Color named(const String &p_name);
 	String to_html(bool p_alpha = true) const;
 	Color from_hsv(float p_h, float p_s, float p_v, float p_a) const;
-	static Color from_rgbe9995(uint32_t p_color);
+	static Color from_rgbe9995(uint32_t p_rgbe);
 
 	_FORCE_INLINE_ bool operator<(const Color &p_color) const; //used in set keys
 	operator String() const;
diff --git a/core/error_macros.h b/core/error_macros.h
index f72e987e23..69874e280b 100644
--- a/core/error_macros.h
+++ b/core/error_macros.h
@@ -136,8 +136,8 @@ extern bool _err_error_exists;
 		if (unlikely((m_index) < 0 || (m_index) >= (m_size))) {                                                     \
 			_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \
 			return;                                                                                                 \
-		} else                                                                                                      \
-			_err_error_exists = false;                                                                              \
+		}                                                                                                           \
+		_err_error_exists = false;                                                                                  \
 	} while (0); // (*)
 
 /** An index has failed if m_index<0 or m_index >=m_size, the function exits.
@@ -150,8 +150,8 @@ extern bool _err_error_exists;
 		if (unlikely((m_index) < 0 || (m_index) >= (m_size))) {                                                     \
 			_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \
 			return m_retval;                                                                                        \
-		} else                                                                                                      \
-			_err_error_exists = false;                                                                              \
+		}                                                                                                           \
+		_err_error_exists = false;                                                                                  \
 	} while (0); // (*)
 
 /** An index has failed if m_index >=m_size, the function exits.
@@ -164,8 +164,8 @@ extern bool _err_error_exists;
 		if (unlikely((m_index) >= (m_size))) {                                                                      \
 			_err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \
 			return m_retval;                                                                                        \
-		} else                                                                                                      \
-			_err_error_exists = false;                                                                              \
+		}                                                                                                           \
+		_err_error_exists = false;                                                                                  \
 	} while (0); // (*)
 
 /** Use this one if there is no sensible fallback, that is, the error is unrecoverable.
@@ -188,8 +188,8 @@ extern bool _err_error_exists;
 		if (unlikely(!m_param)) {                                                                           \
 			_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter ' " _STR(m_param) " ' is null."); \
 			return;                                                                                         \
-		} else                                                                                              \
-			_err_error_exists = false;                                                                      \
+		}                                                                                                   \
+		_err_error_exists = false;                                                                          \
 	}
 
 #define ERR_FAIL_NULL_V(m_param, m_retval)                                                                  \
@@ -197,8 +197,8 @@ extern bool _err_error_exists;
 		if (unlikely(!m_param)) {                                                                           \
 			_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter ' " _STR(m_param) " ' is null."); \
 			return m_retval;                                                                                \
-		} else                                                                                              \
-			_err_error_exists = false;                                                                      \
+		}                                                                                                   \
+		_err_error_exists = false;                                                                          \
 	}
 
 /** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
@@ -210,8 +210,8 @@ extern bool _err_error_exists;
 		if (unlikely(m_cond)) {                                                                            \
 			_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true."); \
 			return;                                                                                        \
-		} else                                                                                             \
-			_err_error_exists = false;                                                                     \
+		}                                                                                                  \
+		_err_error_exists = false;                                                                         \
 	}
 
 /** Use this one if there is no sensible fallback, that is, the error is unrecoverable.
@@ -236,8 +236,8 @@ extern bool _err_error_exists;
 		if (unlikely(m_cond)) {                                                                                                      \
 			_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. returned: " _STR(m_retval)); \
 			return m_retval;                                                                                                         \
-		} else                                                                                                                       \
-			_err_error_exists = false;                                                                                               \
+		}                                                                                                                            \
+		_err_error_exists = false;                                                                                                   \
 	}
 
 /** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
@@ -249,8 +249,8 @@ extern bool _err_error_exists;
 		if (unlikely(m_cond)) {                                                                                          \
 			_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. Continuing..:"); \
 			continue;                                                                                                    \
-		} else                                                                                                           \
-			_err_error_exists = false;                                                                                   \
+		}                                                                                                                \
+		_err_error_exists = false;                                                                                       \
 	}
 
 /** An error condition happened (m_cond tested true) (WARNING this is the opposite as assert().
@@ -262,8 +262,8 @@ extern bool _err_error_exists;
 		if (unlikely(m_cond)) {                                                                                        \
 			_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. Breaking..:"); \
 			break;                                                                                                     \
-		} else                                                                                                         \
-			_err_error_exists = false;                                                                                 \
+		}                                                                                                              \
+		_err_error_exists = false;                                                                                     \
 	}
 
 /** Print an error string and return
diff --git a/core/image.cpp b/core/image.cpp
index c85d7f6bcc..dd8f2b9bac 100644
--- a/core/image.cpp
+++ b/core/image.cpp
@@ -2402,7 +2402,7 @@ Color Image::get_pixel(int p_x, int p_y) const {
 #ifdef DEBUG_ENABLED
 	if (!ptr) {
 		ERR_EXPLAIN("Image must be locked with 'lock()' before using get_pixel()");
-		ERR_FAIL_COND_V(!ptr, Color());
+		ERR_FAIL_V(Color());
 	}
 
 	ERR_FAIL_INDEX_V(p_x, width, Color());
@@ -2541,7 +2541,7 @@ void Image::set_pixel(int p_x, int p_y, const Color &p_color) {
 #ifdef DEBUG_ENABLED
 	if (!ptr) {
 		ERR_EXPLAIN("Image must be locked with 'lock()' before using set_pixel()");
-		ERR_FAIL_COND(!ptr);
+		ERR_FAIL();
 	}
 
 	ERR_FAIL_INDEX(p_x, width);
diff --git a/core/image.h b/core/image.h
index 752ef20208..cc796789cd 100644
--- a/core/image.h
+++ b/core/image.h
@@ -350,7 +350,7 @@ public:
 
 	Color get_pixelv(const Point2 &p_src) const;
 	Color get_pixel(int p_x, int p_y) const;
-	void set_pixelv(const Point2 &p_dest, const Color &p_color);
+	void set_pixelv(const Point2 &p_dst, const Color &p_color);
 	void set_pixel(int p_x, int p_y, const Color &p_color);
 
 	void copy_internals_from(const Ref<Image> &p_image) {
diff --git a/core/input_map.cpp b/core/input_map.cpp
index 012c6a7c4f..04911787a8 100644
--- a/core/input_map.cpp
+++ b/core/input_map.cpp
@@ -194,7 +194,7 @@ bool InputMap::event_get_action_status(const Ref<InputEvent> &p_event, const Str
 	Map<StringName, Action>::Element *E = input_map.find(p_action);
 	if (!E) {
 		ERR_EXPLAIN("Request for nonexistent InputMap action: " + String(p_action));
-		ERR_FAIL_COND_V(!E, false);
+		ERR_FAIL_V(false);
 	}
 
 	Ref<InputEventAction> input_event_action = p_event;
diff --git a/core/io/file_access_network.cpp b/core/io/file_access_network.cpp
index 5dd167c581..d1c7f5c334 100644
--- a/core/io/file_access_network.cpp
+++ b/core/io/file_access_network.cpp
@@ -435,7 +435,6 @@ int FileAccessNetwork::get_buffer(uint8_t *p_dst, int p_length) const {
 
 					_queue_page(page + j);
 				}
-				buff = pages.write[page].buffer.ptrw();
 				//queue pages
 				buffer_mutex->unlock();
 			}
diff --git a/core/io/http_client.cpp b/core/io/http_client.cpp
index 891fb7b0ca..c3626bfe31 100644
--- a/core/io/http_client.cpp
+++ b/core/io/http_client.cpp
@@ -775,7 +775,7 @@ Dictionary HTTPClient::_get_response_headers_as_dictionary() {
 	get_response_headers(&rh);
 	Dictionary ret;
 	for (const List<String>::Element *E = rh.front(); E; E = E->next()) {
-		String s = E->get();
+		const String &s = E->get();
 		int sp = s.find(":");
 		if (sp == -1)
 			continue;
diff --git a/core/io/marshalls.cpp b/core/io/marshalls.cpp
index 3c9c5bc2bb..17a3f52a65 100644
--- a/core/io/marshalls.cpp
+++ b/core/io/marshalls.cpp
@@ -683,8 +683,6 @@ Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int
 
 				if (r_len)
 					(*r_len) += adv;
-				len -= adv;
-				buf += adv;
 			}
 
 			r_variant = varray;
@@ -721,8 +719,6 @@ Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int
 
 				if (r_len)
 					(*r_len) += adv;
-				len -= adv;
-				buf += adv;
 			}
 
 			r_variant = varray;
@@ -760,8 +756,6 @@ Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int
 
 				if (r_len)
 					(*r_len) += adv;
-				len -= adv;
-				buf += adv;
 			}
 
 			r_variant = carray;
@@ -1094,7 +1088,6 @@ Error encode_variant(const Variant &p_variant, uint8_t *r_buffer, int &r_len, bo
 				if (!obj) {
 					if (buf) {
 						encode_uint32(0, buf);
-						buf += 4;
 					}
 					r_len += 4;
 
diff --git a/core/io/multiplayer_api.h b/core/io/multiplayer_api.h
index 779dd043bd..5258dde5d7 100644
--- a/core/io/multiplayer_api.h
+++ b/core/io/multiplayer_api.h
@@ -77,7 +77,7 @@ protected:
 	void _process_raw(int p_from, const uint8_t *p_packet, int p_packet_len);
 
 	void _send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p_set, const StringName &p_name, const Variant **p_arg, int p_argcount);
-	bool _send_confirm_path(NodePath p_path, PathSentCache *psc, int p_from);
+	bool _send_confirm_path(NodePath p_path, PathSentCache *psc, int p_target);
 
 public:
 	enum NetworkCommands {
diff --git a/core/io/pck_packer.cpp b/core/io/pck_packer.cpp
index 8920bbfb81..55685a2d9a 100644
--- a/core/io/pck_packer.cpp
+++ b/core/io/pck_packer.cpp
@@ -109,10 +109,7 @@ Error PCKPacker::add_file(const String &p_file, const String &p_src) {
 
 Error PCKPacker::flush(bool p_verbose) {
 
-	if (!file) {
-		ERR_FAIL_COND_V(!file, ERR_INVALID_PARAMETER);
-		return ERR_INVALID_PARAMETER;
-	};
+	ERR_FAIL_COND_V(!file, ERR_INVALID_PARAMETER);
 
 	// write the index
 
diff --git a/core/io/resource_format_binary.cpp b/core/io/resource_format_binary.cpp
index aef2dcfff3..688dfc21e5 100644
--- a/core/io/resource_format_binary.cpp
+++ b/core/io/resource_format_binary.cpp
@@ -720,7 +720,7 @@ Error ResourceInteractiveLoaderBinary::poll() {
 		error = ERR_FILE_CORRUPT;
 		memdelete(obj); //bye
 		ERR_EXPLAIN(local_path + ":Resource type in resource field not a resource, type is: " + obj->get_class());
-		ERR_FAIL_COND_V(!r, ERR_FILE_CORRUPT);
+		ERR_FAIL_V(ERR_FILE_CORRUPT);
 	}
 
 	RES res = RES(r);
@@ -1694,7 +1694,7 @@ void ResourceFormatSaverBinaryInstance::_find_resources(const Variant &p_variant
 			int len = varray.size();
 			for (int i = 0; i < len; i++) {
 
-				Variant v = varray.get(i);
+				const Variant &v = varray.get(i);
 				_find_resources(v);
 			}
 
diff --git a/core/io/stream_peer_tcp.cpp b/core/io/stream_peer_tcp.cpp
index 45f3e46e35..bcdae343b8 100644
--- a/core/io/stream_peer_tcp.cpp
+++ b/core/io/stream_peer_tcp.cpp
@@ -352,7 +352,6 @@ void StreamPeerTCP::_bind_methods() {
 StreamPeerTCP::StreamPeerTCP() :
 		_sock(Ref<NetSocket>(NetSocket::create())),
 		status(STATUS_NONE),
-		peer_host(IP_Address()),
 		peer_port(0) {
 }
 
diff --git a/core/io/tcp_server.cpp b/core/io/tcp_server.cpp
index 6599c4eb5b..be87f47d50 100644
--- a/core/io/tcp_server.cpp
+++ b/core/io/tcp_server.cpp
@@ -83,11 +83,7 @@ bool TCP_Server::is_connection_available() const {
 		return false;
 
 	Error err = _sock->poll(NetSocket::POLL_TYPE_IN, 0);
-	if (err != OK) {
-		return false;
-	}
-
-	return true;
+	return (err == OK);
 }
 
 Ref<StreamPeerTCP> TCP_Server::take_connection() {
diff --git a/core/math/expression.cpp b/core/math/expression.cpp
index e484e9194d..b52658e2cf 100644
--- a/core/math/expression.cpp
+++ b/core/math/expression.cpp
@@ -1794,7 +1794,7 @@ Expression::ENode *Expression::_parse_expression() {
 		if (next_op == -1) {
 
 			_set_error("Yet another parser bug....");
-			ERR_FAIL_COND_V(next_op == -1, NULL);
+			ERR_FAIL_V(NULL);
 		}
 
 		// OK! create operator..
diff --git a/core/math/random_number_generator.cpp b/core/math/random_number_generator.cpp
index 6add00c1d8..54a88d5cd8 100644
--- a/core/math/random_number_generator.cpp
+++ b/core/math/random_number_generator.cpp
@@ -30,8 +30,7 @@
 
 #include "random_number_generator.h"
 
-RandomNumberGenerator::RandomNumberGenerator() :
-		randbase() {}
+RandomNumberGenerator::RandomNumberGenerator() {}
 
 void RandomNumberGenerator::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_seed", "seed"), &RandomNumberGenerator::set_seed);
diff --git a/core/math/triangle_mesh.h b/core/math/triangle_mesh.h
index ee7bf0f6b5..8b01080852 100644
--- a/core/math/triangle_mesh.h
+++ b/core/math/triangle_mesh.h
@@ -97,7 +97,7 @@ public:
 
 	PoolVector<Triangle> get_triangles() const { return triangles; }
 	PoolVector<Vector3> get_vertices() const { return vertices; }
-	void get_indices(PoolVector<int> *p_triangles_indices) const;
+	void get_indices(PoolVector<int> *r_triangles_indices) const;
 
 	void create(const PoolVector<Vector3> &p_faces);
 	TriangleMesh();
diff --git a/core/node_path.cpp b/core/node_path.cpp
index 07ff765516..a4b7cbe2eb 100644
--- a/core/node_path.cpp
+++ b/core/node_path.cpp
@@ -357,7 +357,7 @@ NodePath::NodePath(const String &p_path) {
 	String path = p_path;
 	Vector<StringName> subpath;
 
-	int absolute = (path[0] == '/') ? 1 : 0;
+	bool absolute = (path[0] == '/');
 	bool last_is_slash = true;
 	bool has_slashes = false;
 	int slices = 0;
@@ -387,7 +387,7 @@ NodePath::NodePath(const String &p_path) {
 		path = path.substr(0, subpath_pos);
 	}
 
-	for (int i = absolute; i < path.length(); i++) {
+	for (int i = (int)absolute; i < path.length(); i++) {
 
 		if (path[i] == '/') {
 
@@ -407,7 +407,7 @@ NodePath::NodePath(const String &p_path) {
 
 	data = memnew(Data);
 	data->refcount.init();
-	data->absolute = absolute ? true : false;
+	data->absolute = absolute;
 	data->has_slashes = has_slashes;
 	data->subpath = subpath;
 	data->hash_cache_valid = false;
@@ -416,10 +416,10 @@ NodePath::NodePath(const String &p_path) {
 		return;
 	data->path.resize(slices);
 	last_is_slash = true;
-	int from = absolute;
+	int from = (int)absolute;
 	int slice = 0;
 
-	for (int i = absolute; i < path.length() + 1; i++) {
+	for (int i = (int)absolute; i < path.length() + 1; i++) {
 
 		if (path[i] == '/' || path[i] == 0) {
 
diff --git a/core/object.cpp b/core/object.cpp
index 64f55f08a9..5dbf36940e 100644
--- a/core/object.cpp
+++ b/core/object.cpp
@@ -474,7 +474,6 @@ void Object::set(const StringName &p_name, const Variant &p_value, bool *r_valid
 
 	if (r_valid)
 		*r_valid = false;
-	return;
 }
 
 Variant Object::get(const StringName &p_name, bool *r_valid) const {
@@ -810,11 +809,7 @@ bool Object::has_method(const StringName &p_method) const {
 
 	MethodBind *method = ClassDB::get_method(get_class_name(), p_method);
 
-	if (method) {
-		return true;
-	}
-
-	return false;
+	return method != NULL;
 }
 
 Variant Object::getvar(const Variant &p_key, bool *r_valid) const {
@@ -1485,7 +1480,7 @@ Error Object::connect(const StringName &p_signal, Object *p_to_object, const Str
 			return OK;
 		} else {
 			ERR_EXPLAIN("Signal '" + p_signal + "' is already connected to given method '" + p_to_method + "' in that object.");
-			ERR_FAIL_COND_V(s->slot_map.has(target), ERR_INVALID_PARAMETER);
+			ERR_FAIL_V(ERR_INVALID_PARAMETER);
 		}
 	}
 
@@ -1542,11 +1537,11 @@ void Object::_disconnect(const StringName &p_signal, Object *p_to_object, const
 	Signal *s = signal_map.getptr(p_signal);
 	if (!s) {
 		ERR_EXPLAIN("Nonexistent signal: " + p_signal);
-		ERR_FAIL_COND(!s);
+		ERR_FAIL();
 	}
 	if (s->lock > 0) {
 		ERR_EXPLAIN("Attempt to disconnect signal '" + p_signal + "' while emitting (locks: " + itos(s->lock) + ")");
-		ERR_FAIL_COND(s->lock > 0);
+		ERR_FAIL();
 	}
 
 	Signal::Target target(p_to_object->get_instance_id(), p_to_method);
diff --git a/core/os/dir_access.cpp b/core/os/dir_access.cpp
index d81c30f33a..1c57bfdf3d 100644
--- a/core/os/dir_access.cpp
+++ b/core/os/dir_access.cpp
@@ -373,7 +373,7 @@ Error DirAccess::_copy_dir(DirAccess *p_target_da, String p_to, int p_chmod_flag
 			if (current_is_dir())
 				dirs.push_back(n);
 			else {
-				String rel_path = n;
+				const String &rel_path = n;
 				if (!n.is_rel_path()) {
 					list_dir_end();
 					return ERR_BUG;
diff --git a/core/os/file_access.cpp b/core/os/file_access.cpp
index 913caf6584..b5580b5c6e 100644
--- a/core/os/file_access.cpp
+++ b/core/os/file_access.cpp
@@ -601,7 +601,8 @@ Vector<uint8_t> FileAccess::get_file_as_array(const String &p_path, Error *r_err
 		if (r_error) { // if error requested, do not throw error
 			return Vector<uint8_t>();
 		}
-		ERR_FAIL_COND_V(!f, Vector<uint8_t>());
+		ERR_EXPLAIN("Can't open file from path: " + String(p_path));
+		ERR_FAIL_V(Vector<uint8_t>());
 	}
 	Vector<uint8_t> data;
 	data.resize(f->get_len());
@@ -621,7 +622,8 @@ String FileAccess::get_file_as_string(const String &p_path, Error *r_error) {
 		if (r_error) {
 			return String();
 		}
-		ERR_FAIL_COND_V(err != OK, String());
+		ERR_EXPLAIN("Can't get file as string from path: " + String(p_path));
+		ERR_FAIL_V(String());
 	}
 
 	String ret;
diff --git a/core/os/input_event.cpp b/core/os/input_event.cpp
index 9c5066da3d..a40a50cfce 100644
--- a/core/os/input_event.cpp
+++ b/core/os/input_event.cpp
@@ -314,7 +314,7 @@ bool InputEventKey::action_match(const Ref<InputEvent> &p_event, bool *p_pressed
 		if (p_pressed != NULL)
 			*p_pressed = key->is_pressed();
 		if (p_strength != NULL)
-			*p_strength = (*p_pressed) ? 1.0f : 0.0f;
+			*p_strength = (p_pressed != NULL && *p_pressed) ? 1.0f : 0.0f;
 	}
 	return match;
 }
@@ -483,7 +483,7 @@ bool InputEventMouseButton::action_match(const Ref<InputEvent> &p_event, bool *p
 		if (p_pressed != NULL)
 			*p_pressed = mb->is_pressed();
 		if (p_strength != NULL)
-			*p_strength = (*p_pressed) ? 1.0f : 0.0f;
+			*p_strength = (p_pressed != NULL && *p_pressed) ? 1.0f : 0.0f;
 	}
 
 	return match;
@@ -795,7 +795,7 @@ bool InputEventJoypadButton::action_match(const Ref<InputEvent> &p_event, bool *
 		if (p_pressed != NULL)
 			*p_pressed = jb->is_pressed();
 		if (p_strength != NULL)
-			*p_strength = (*p_pressed) ? 1.0f : 0.0f;
+			*p_strength = (p_pressed != NULL && *p_pressed) ? 1.0f : 0.0f;
 	}
 
 	return match;
@@ -1041,7 +1041,7 @@ bool InputEventAction::action_match(const Ref<InputEvent> &p_event, bool *p_pres
 		if (p_pressed != NULL)
 			*p_pressed = act->pressed;
 		if (p_strength != NULL)
-			*p_strength = (*p_pressed) ? 1.0f : 0.0f;
+			*p_strength = (p_pressed != NULL && *p_pressed) ? 1.0f : 0.0f;
 	}
 	return match;
 }
diff --git a/core/os/os.cpp b/core/os/os.cpp
index 1a3c9ac5f8..027740c6a9 100644
--- a/core/os/os.cpp
+++ b/core/os/os.cpp
@@ -239,7 +239,8 @@ void OS::print_all_resources(String p_to_file) {
 		_OSPRF = FileAccess::open(p_to_file, FileAccess::WRITE, &err);
 		if (err != OK) {
 			_OSPRF = NULL;
-			ERR_FAIL_COND(err != OK);
+			ERR_EXPLAIN("Can't print all resources to file: " + String(p_to_file));
+			ERR_FAIL();
 		}
 	}
 
diff --git a/core/pool_allocator.cpp b/core/pool_allocator.cpp
index 11a3be89bd..094352b5cc 100644
--- a/core/pool_allocator.cpp
+++ b/core/pool_allocator.cpp
@@ -206,8 +206,8 @@ PoolAllocator::ID PoolAllocator::alloc(int p_size) {
 		if (!find_hole(&new_entry_indices_pos, size_to_alloc)) {
 
 			mt_unlock();
-			ERR_PRINT("memory can't be compacted further");
-			return POOL_ALLOCATOR_INVALID_ID;
+			ERR_EXPLAIN("Memory can't be compacted further");
+			ERR_FAIL_V(POOL_ALLOCATOR_INVALID_ID);
 		}
 	}
 
@@ -217,7 +217,8 @@ PoolAllocator::ID PoolAllocator::alloc(int p_size) {
 
 	if (!found_free_entry) {
 		mt_unlock();
-		ERR_FAIL_COND_V(!found_free_entry, POOL_ALLOCATOR_INVALID_ID);
+		ERR_EXPLAIN("No free entry found in PoolAllocator");
+		ERR_FAIL_V(POOL_ALLOCATOR_INVALID_ID);
 	}
 
 	/* move all entry indices up, make room for this one */
diff --git a/core/project_settings.cpp b/core/project_settings.cpp
index 0508806a35..983b2a2576 100644
--- a/core/project_settings.cpp
+++ b/core/project_settings.cpp
@@ -566,7 +566,7 @@ Error ProjectSettings::_load_settings_text(const String p_path) {
 				if (config_version > CONFIG_VERSION) {
 					memdelete(f);
 					ERR_EXPLAIN(vformat("Can't open project at '%s', its `config_version` (%d) is from a more recent and incompatible version of the engine. Expected config version: %d.", p_path, config_version, CONFIG_VERSION));
-					ERR_FAIL_COND_V(config_version > CONFIG_VERSION, ERR_FILE_CANT_OPEN);
+					ERR_FAIL_V(ERR_FILE_CANT_OPEN);
 				}
 			} else {
 				if (section == String()) {
diff --git a/core/safe_refcount.h b/core/safe_refcount.h
index f6b8f80271..54f540b0c7 100644
--- a/core/safe_refcount.h
+++ b/core/safe_refcount.h
@@ -189,11 +189,7 @@ public:
 
 	_ALWAYS_INLINE_ bool unref() { // true if must be disposed of
 
-		if (atomic_decrement(&count) == 0) {
-			return true;
-		}
-
-		return false;
+		return atomic_decrement(&count) == 0;
 	}
 
 	_ALWAYS_INLINE_ uint32_t get() const { // nothrow
diff --git a/core/ustring.cpp b/core/ustring.cpp
index 686aa6f8e3..ff28fa420d 100644
--- a/core/ustring.cpp
+++ b/core/ustring.cpp
@@ -3799,11 +3799,7 @@ bool String::is_valid_filename() const {
 		return false;
 	}
 
-	if (find(":") != -1 || find("/") != -1 || find("\\") != -1 || find("?") != -1 || find("*") != -1 || find("\"") != -1 || find("|") != -1 || find("%") != -1 || find("<") != -1 || find(">") != -1) {
-		return false;
-	} else {
-		return true;
-	}
+	return !(find(":") != -1 || find("/") != -1 || find("\\") != -1 || find("?") != -1 || find("*") != -1 || find("\"") != -1 || find("|") != -1 || find("%") != -1 || find("<") != -1 || find(">") != -1);
 }
 
 bool String::is_valid_ip_address() const {
@@ -3941,7 +3937,6 @@ String String::percent_decode() const {
 			uint8_t a = LOWERCASE(cs[i + 1]);
 			uint8_t b = LOWERCASE(cs[i + 2]);
 
-			c = 0;
 			if (a >= '0' && a <= '9')
 				c = (a - '0') << 4;
 			else if (a >= 'a' && a <= 'f')
diff --git a/core/ustring.h b/core/ustring.h
index ecf934a26b..a32daabb91 100644
--- a/core/ustring.h
+++ b/core/ustring.h
@@ -404,8 +404,6 @@ _FORCE_INLINE_ bool is_str_less(const L *l_ptr, const R *r_ptr) {
 		l_ptr++;
 		r_ptr++;
 	}
-
-	CRASH_COND(true); // unreachable
 }
 
 /* end of namespace */
diff --git a/core/variant.cpp b/core/variant.cpp
index 6eadf59fce..9306867ac7 100644
--- a/core/variant.cpp
+++ b/core/variant.cpp
@@ -709,7 +709,7 @@ bool Variant::is_zero() const {
 		// atomic types
 		case BOOL: {
 
-			return _data._bool == false;
+			return !(_data._bool);
 		} break;
 		case INT: {
 
diff --git a/core/variant.h b/core/variant.h
index 5151262f27..a8e99c13f1 100644
--- a/core/variant.h
+++ b/core/variant.h
@@ -248,8 +248,8 @@ public:
 	Variant(unsigned short p_short);
 	Variant(signed char p_char); // real one
 	Variant(unsigned char p_char);
-	Variant(int64_t p_char); // real one
-	Variant(uint64_t p_char);
+	Variant(int64_t p_int); // real one
+	Variant(uint64_t p_int);
 	Variant(float p_float);
 	Variant(double p_double);
 	Variant(const String &p_string);
@@ -262,11 +262,11 @@ public:
 	Variant(const Plane &p_plane);
 	Variant(const ::AABB &p_aabb);
 	Variant(const Quat &p_quat);
-	Variant(const Basis &p_transform);
+	Variant(const Basis &p_matrix);
 	Variant(const Transform2D &p_transform);
 	Variant(const Transform &p_transform);
 	Variant(const Color &p_color);
-	Variant(const NodePath &p_path);
+	Variant(const NodePath &p_node_path);
 	Variant(const RefPtr &p_resource);
 	Variant(const RID &p_rid);
 	Variant(const Object *p_object);
@@ -283,17 +283,17 @@ public:
 	Variant(const PoolVector<Face3> &p_face_array);
 
 	Variant(const Vector<Variant> &p_array);
-	Variant(const Vector<uint8_t> &p_raw_array);
-	Variant(const Vector<int> &p_int_array);
-	Variant(const Vector<real_t> &p_real_array);
-	Variant(const Vector<String> &p_string_array);
-	Variant(const Vector<StringName> &p_string_array);
-	Variant(const Vector<Vector3> &p_vector3_array);
-	Variant(const Vector<Color> &p_color_array);
+	Variant(const Vector<uint8_t> &p_array);
+	Variant(const Vector<int> &p_array);
+	Variant(const Vector<real_t> &p_array);
+	Variant(const Vector<String> &p_array);
+	Variant(const Vector<StringName> &p_array);
+	Variant(const Vector<Vector3> &p_array);
+	Variant(const Vector<Color> &p_array);
 	Variant(const Vector<Plane> &p_array); // helper
 	Variant(const Vector<RID> &p_array); // helper
 	Variant(const Vector<Vector2> &p_array); // helper
-	Variant(const PoolVector<Vector2> &p_array); // helper
+	Variant(const PoolVector<Vector2> &p_vector2_array); // helper
 
 	Variant(const IP_Address &p_address);