Fix error when calling coroutine with await in _ready

The code paths for calling async functions seemed to be missing in some
cases, causing a debug break and false positive error.

modules/gdscript/gdscript_byte_codegen.cpp

@@ -899,6 +899,17 @@ void GDScriptByteCodeGenerator::write_call_self(const Address &p_target, const S
 	append(p_function_name);
 }
 
+void GDScriptByteCodeGenerator::write_call_self_async(const Address &p_target, const StringName &p_function_name, const Vector<Address> &p_arguments) {
+	append(GDScriptFunction::OPCODE_CALL_ASYNC, 2 + p_arguments.size());
+	for (int i = 0; i < p_arguments.size(); i++) {
+		append(p_arguments[i]);
+	}
+	append(GDScriptFunction::ADDR_TYPE_SELF << GDScriptFunction::ADDR_BITS);
+	append(p_target);
+	append(p_arguments.size());
+	append(p_function_name);
+}
+
 void GDScriptByteCodeGenerator::write_call_script_function(const Address &p_target, const Address &p_base, const StringName &p_function_name, const Vector<Address> &p_arguments) {
 	append(p_target.mode == Address::NIL ? GDScriptFunction::OPCODE_CALL : GDScriptFunction::OPCODE_CALL_RETURN, 2 + p_arguments.size());
 	for (int i = 0; i < p_arguments.size(); i++) {

modules/gdscript/gdscript_byte_codegen.h

@@ -441,6 +441,7 @@ public:
 	virtual void write_call_method_bind(const Address &p_target, const Address &p_base, MethodBind *p_method, const Vector<Address> &p_arguments) override;
 	virtual void write_call_ptrcall(const Address &p_target, const Address &p_base, MethodBind *p_method, const Vector<Address> &p_arguments) override;
 	virtual void write_call_self(const Address &p_target, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
+	virtual void write_call_self_async(const Address &p_target, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
 	virtual void write_call_script_function(const Address &p_target, const Address &p_base, const StringName &p_function_name, const Vector<Address> &p_arguments) override;
 	virtual void write_construct(const Address &p_target, Variant::Type p_type, const Vector<Address> &p_arguments) override;
 	virtual void write_construct_array(const Address &p_target, const Vector<Address> &p_arguments) override;

modules/gdscript/gdscript_codegen.h

@@ -133,6 +133,7 @@ public:
 	virtual void write_call_method_bind(const Address &p_target, const Address &p_base, MethodBind *p_method, const Vector<Address> &p_arguments) = 0;
 	virtual void write_call_ptrcall(const Address &p_target, const Address &p_base, MethodBind *p_method, const Vector<Address> &p_arguments) = 0;
 	virtual void write_call_self(const Address &p_target, const StringName &p_function_name, const Vector<Address> &p_arguments) = 0;
+	virtual void write_call_self_async(const Address &p_target, const StringName &p_function_name, const Vector<Address> &p_arguments) = 0;
 	virtual void write_call_script_function(const Address &p_target, const Address &p_base, const StringName &p_function_name, const Vector<Address> &p_arguments) = 0;
 	virtual void write_construct(const Address &p_target, Variant::Type p_type, const Vector<Address> &p_arguments) = 0;
 	virtual void write_construct_array(const Address &p_target, const Vector<Address> &p_arguments) = 0;

modules/gdscript/gdscript_compiler.cpp

@@ -494,9 +494,17 @@ GDScriptCodeGenerator::Address GDScriptCompiler::_parse_expression(CodeGen &code
 						} else if ((codegen.function_node && codegen.function_node->is_static) || call->function_name == "new") {
 							GDScriptCodeGenerator::Address self;
 							self.mode = GDScriptCodeGenerator::Address::CLASS;
-							gen->write_call(result, self, call->function_name, arguments);
+							if (within_await) {
+								gen->write_call_async(result, self, call->function_name, arguments);
+							} else {
+								gen->write_call(result, self, call->function_name, arguments);
+							}
 						} else {
-							gen->write_call_self(result, call->function_name, arguments);
+							if (within_await) {
+								gen->write_call_self_async(result, call->function_name, arguments);
+							} else {
+								gen->write_call_self(result, call->function_name, arguments);
+							}
 						}
 					} else if (callee->type == GDScriptParser::Node::SUBSCRIPT) {
 						const GDScriptParser::SubscriptNode *subscript = static_cast<const GDScriptParser::SubscriptNode *>(call->callee);