1 files changed, 28 insertions, 12 deletions

diff --git a/modules/gdscript/gdscript_compiler.cpp b/modules/gdscript/gdscript_compiler.cpp
index 35c9946bc1..d0c2cb43a6 100644
--- a/modules/gdscript/gdscript_compiler.cpp
+++ b/modules/gdscript/gdscript_compiler.cpp
@@ -85,7 +85,7 @@ void GDScriptCompiler::_set_error(const String &p_error, const GDScriptParser::N
 }
 
 GDScriptDataType GDScriptCompiler::_gdtype_from_datatype(const GDScriptParser::DataType &p_datatype, GDScript *p_owner) {
-	if (!p_datatype.is_set() || !p_datatype.is_hard_type()) {
+	if (!p_datatype.is_set() || !p_datatype.is_hard_type() || p_datatype.is_coroutine) {
 		return GDScriptDataType();
 	}
 
@@ -238,7 +238,7 @@ GDScriptCodeGenerator::Address GDScriptCompiler::_parse_expression(CodeGen &code
 			// Try class members.
 			if (_is_class_member_property(codegen, identifier)) {
 				// Get property.
-				GDScriptCodeGenerator::Address temp = codegen.add_temporary(); // TODO: Could get the type of the class member here.
+				GDScriptCodeGenerator::Address temp = codegen.add_temporary(_gdtype_from_datatype(p_expression->get_datatype(), codegen.script));
 				gen->write_get_member(temp, identifier);
 				return temp;
 			}
@@ -2018,6 +2018,32 @@ GDScriptFunction *GDScriptCompiler::_parse_function(Error &r_error, GDScript *p_
 	bool is_initializer = p_func && !p_for_lambda && p_func->identifier->name == GDScriptLanguage::get_singleton()->strings._init;
 	bool is_implicit_ready = !p_func && p_for_ready;
 
+	if (!p_for_lambda && is_implicit_initializer) {
+		// Initialize the default values for type variables before anything.
+		// This avoids crashes if they are accessed with validated calls before being properly initialized.
+		// It may happen with out-of-order access or with `@onready` variables.
+		for (const GDScriptParser::ClassNode::Member &member : p_class->members) {
+			if (member.type != GDScriptParser::ClassNode::Member::VARIABLE) {
+				continue;
+			}
+
+			const GDScriptParser::VariableNode *field = member.variable;
+			GDScriptDataType field_type = _gdtype_from_datatype(field->get_datatype(), codegen.script);
+			GDScriptCodeGenerator::Address dst_address(GDScriptCodeGenerator::Address::MEMBER, codegen.script->member_indices[field->identifier->name].index, field_type);
+
+			if (field_type.has_type) {
+				codegen.generator->write_newline(field->start_line);
+
+				if (field_type.has_container_element_type()) {
+					codegen.generator->write_construct_typed_array(dst_address, field_type.get_container_element_type(), Vector<GDScriptCodeGenerator::Address>());
+				} else if (field_type.kind == GDScriptDataType::BUILTIN) {
+					codegen.generator->write_construct(dst_address, field_type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
+				}
+				// The `else` branch is for objects, in such case we leave it as `null`.
+			}
+		}
+	}
+
 	if (!p_for_lambda && (is_implicit_initializer || is_implicit_ready)) {
 		// Initialize class fields.
 		for (int i = 0; i < p_class->members.size(); i++) {
@@ -2051,16 +2077,6 @@ GDScriptFunction *GDScriptCompiler::_parse_function(Error &r_error, GDScript *p_
 				if (src_address.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
 					codegen.generator->pop_temporary();
 				}
-			} else if (field_type.has_type) {
-				codegen.generator->write_newline(field->start_line);
-
-				// Initialize with default for type.
-				if (field_type.has_container_element_type()) {
-					codegen.generator->write_construct_typed_array(dst_address, field_type.get_container_element_type(), Vector<GDScriptCodeGenerator::Address>());
-				} else if (field_type.kind == GDScriptDataType::BUILTIN) {
-					codegen.generator->write_construct(dst_address, field_type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
-				}
-				// The `else` branch is for objects, in such case we leave it as `null`.
 			}
 		}
 	}