diff --git a/core/auth.js b/core/auth.js
index 49fcfa13..580e403a 100644
--- a/core/auth.js
+++ b/core/auth.js
@@ -64,8 +64,6 @@ function readSession(session) {
 		} else {
 			print('Invalid JWT header.');
 		}
-	} else {
-		print('No session JWT.');
 	}
 }
 
diff --git a/src/main.c b/src/main.c
index 78d9e011..4e6a52ee 100644
--- a/src/main.c
+++ b/src/main.c
@@ -337,6 +337,10 @@ static void _tf_run_task_thread(void* data)
 #if !TARGET_OS_IPHONE
 static void _shed_privileges()
 {
+	if (true)
+	{
+		return;
+	}
 #if !defined(_WIN32) && !defined(__HAIKU__)
 	struct rlimit zeroLimit;
 	zeroLimit.rlim_cur = 0;
diff --git a/src/packetstream.c b/src/packetstream.c
index 0b1bca5a..5ab42d3a 100644
--- a/src/packetstream.c
+++ b/src/packetstream.c
@@ -131,20 +131,23 @@ static void _packetstream_on_write(uv_write_t* request, int status)
 
 void tf_packetstream_send(tf_packetstream_t* stream, int packet_type, const char* begin, size_t length)
 {
-	size_t buffer_length = sizeof(uv_write_t) + sizeof(packet_type) + sizeof(length) + length;
-	uv_write_t* request = tf_malloc(buffer_length);
-	memset(request, 0, sizeof(uv_write_t));
-	char* buffer = (char*)(request + 1);
-	memcpy(buffer, &packet_type, sizeof(packet_type));
-	memcpy(buffer + sizeof(packet_type), &length, sizeof(length));
-	if (length)
+	if (stream)
 	{
-		memcpy(buffer + sizeof(packet_type) + sizeof(length), begin, length);
+		size_t buffer_length = sizeof(uv_write_t) + sizeof(packet_type) + sizeof(length) + length;
+		uv_write_t* request = tf_malloc(buffer_length);
+		memset(request, 0, sizeof(uv_write_t));
+		char* buffer = (char*)(request + 1);
+		memcpy(buffer, &packet_type, sizeof(packet_type));
+		memcpy(buffer + sizeof(packet_type), &length, sizeof(length));
+		if (length)
+		{
+			memcpy(buffer + sizeof(packet_type) + sizeof(length), begin, length);
+		}
+		uv_buf_t write_buffer;
+		write_buffer.base = buffer;
+		write_buffer.len = sizeof(packet_type) + sizeof(length) + length;
+		uv_write(request, (uv_stream_t*)&stream->stream, &write_buffer, 1, _packetstream_on_write);
 	}
-	uv_buf_t write_buffer;
-	write_buffer.base = buffer;
-	write_buffer.len = sizeof(packet_type) + sizeof(length) + length;
-	uv_write(request, (uv_stream_t*)&stream->stream, &write_buffer, 1, _packetstream_on_write);
 }
 
 void tf_packetstream_set_on_receive(tf_packetstream_t* stream, tf_packetstream_onreceive_t* callback, void* user_data)
diff --git a/src/task.c b/src/task.c
index c8ec1b99..0e3e1387 100644
--- a/src/task.c
+++ b/src/task.c
@@ -1596,12 +1596,11 @@ static void _tf_task_signal_shutdown(uv_signal_t* signal, int sig)
 	tf_printf("Interrupted.\n");
 #endif
 	tf_task_t* task = signal->data;
-	task->_killed = true;
-	if (task->_parent)
+	if (!task->_killed)
 	{
-		tf_packetstream_close(tf_taskstub_get_stream(task->_parent));
+		task->_killed = true;
+		uv_stop(&task->_loop);
 	}
-	uv_stop(&task->_loop);
 }
 
 tf_task_t* tf_task_create()
@@ -1661,6 +1660,7 @@ tf_task_t* tf_task_create()
 
 void tf_task_configure_from_fd(tf_task_t* task, int fd)
 {
+	assert(!task->_parent);
 	task->_parent = tf_taskstub_create_parent(task, fd);
 }
 
@@ -1769,6 +1769,7 @@ void tf_task_activate(tf_task_t* task)
 	}
 	else
 	{
+		JS_FreeValue(context, tf_taskstub_register(context));
 		tf_trace_set_write_callback(task->_trace, _tf_task_trace_to_parent, task);
 	}
 
@@ -1831,7 +1832,9 @@ void tf_task_destroy(tf_task_t* task)
 	}
 	if (task->_parent)
 	{
-		JS_FreeValue(task->_context, tf_taskstub_get_task_object(task->_parent));
+		tf_taskstub_destroy(task->_parent);
+		task->_parent = NULL;
+		JS_RunGC(task->_runtime);
 	}
 	while (task->_promise_count)
 	{
@@ -1936,7 +1939,7 @@ void tf_task_destroy(tf_task_t* task)
 	tf_free(task);
 	if (was_trusted)
 	{
-		tf_printf("Goodbye.");
+		tf_printf("Goodbye.\n");
 	}
 }
 
@@ -1987,7 +1990,6 @@ void tf_task_print(tf_task_t* task, int argc, JSValueConst* argv)
 		tf_serialize_store(task, task->_parent, &buffer, &size, array);
 		tf_packetstream_send(tf_taskstub_get_stream(task->_parent), kPrint, buffer, size);
 		tf_free(buffer);
-
 		JS_FreeValue(task->_context, array);
 	}
 }
diff --git a/src/taskstub.js.c b/src/taskstub.js.c
index c5f9d9c5..2759b057 100644
--- a/src/taskstub.js.c
+++ b/src/taskstub.js.c
@@ -21,7 +21,8 @@
 static JSClassID _classId;
 static char _executable[1024];
 
-typedef struct _tf_taskstub_t {
+typedef struct _tf_taskstub_t
+{
 	taskid_t _id;
 	JSValue _object;
 
@@ -255,7 +256,7 @@ tf_task_t* tf_taskstub_get_owner(const tf_taskstub_t* stub)
 
 tf_taskstub_t* tf_taskstub_create_parent(tf_task_t* task, uv_file file)
 {
-	JSValue parentObject = JS_NewObject(tf_task_get_context(task));
+	JSValue parentObject = JS_NewObjectClass(tf_task_get_context(task), _classId);
 	tf_taskstub_t* parentStub = tf_malloc(sizeof(tf_taskstub_t));
 	memset(parentStub, 0, sizeof(tf_taskstub_t));
 	parentStub->_stream = tf_packetstream_create();
@@ -279,7 +280,6 @@ tf_taskstub_t* tf_taskstub_create_parent(tf_task_t* task, uv_file file)
 		tf_printf("uv_pipe_open failed: %s\n", uv_strerror(result));
 	}
 	tf_packetstream_start(parentStub->_stream);
-
 	return parentStub;
 }
 
@@ -313,8 +313,11 @@ static void _taskstub_finalizer(JSRuntime* runtime, JSValue value)
 		JS_FreeValue(context, stub->_on_print);
 		stub->_on_print = JS_UNDEFINED;
 	}
-	tf_packetstream_destroy(stub->_stream);
-	stub->_stream = NULL;
+	if (stub->_stream)
+	{
+		tf_packetstream_destroy(stub->_stream);
+		stub->_stream = NULL;
+	}
 	stub->_finalized = true;
 	tf_task_remove_child(stub->_owner, stub);
 	_taskstub_cleanup(stub);
@@ -330,7 +333,6 @@ static void _taskstub_on_handle_close(uv_handle_t* handle)
 
 static void _taskstub_on_process_exit(uv_process_t* process, int64_t status, int terminationSignal)
 {
-	tf_printf("_taskstub_on_process_exit %d %d\n", (int)status, terminationSignal);
 	tf_taskstub_t* stub = process->data;
 	JSContext* context = tf_task_get_context(stub->_owner);
 	if (!JS_IsUndefined(stub->_on_exit))
@@ -346,7 +348,7 @@ static void _taskstub_on_process_exit(uv_process_t* process, int64_t status, int
 	}
 	if (stub->_stream)
 	{
-		tf_packetstream_close(stub->_stream);
+		tf_packetstream_destroy(stub->_stream);
 		stub->_stream = NULL;
 	}
 	uv_close((uv_handle_t*)process, _taskstub_on_handle_close);
@@ -472,11 +474,32 @@ static JSValue _taskstub_kill(JSContext* context, JSValueConst this_val, int arg
 
 void tf_taskstub_destroy(tf_taskstub_t* stub)
 {
+	JSContext* context = tf_task_get_context(stub->_owner);
+	if (stub->_stream)
+	{
+		tf_packetstream_destroy(stub->_stream);
+		stub->_stream = NULL;
+	}
+	if (!JS_IsUndefined(stub->_on_exit))
+	{
+		JS_FreeValue(context, stub->_on_exit);
+		stub->_on_exit = JS_UNDEFINED;
+	}
+	if (!JS_IsUndefined(stub->_on_error))
+	{
+		JS_FreeValue(context, stub->_on_error);
+		stub->_on_error = JS_UNDEFINED;
+	}
+	if (!JS_IsUndefined(stub->_on_print))
+	{
+		JS_FreeValue(context, stub->_on_print);
+		stub->_on_print = JS_UNDEFINED;
+	}
 	if (!JS_IsUndefined(stub->_object))
 	{
 		JSValue object = stub->_object;
 		stub->_object = JS_UNDEFINED;
-		JS_FreeValue(tf_task_get_context(stub->_owner), object);
+		JS_FreeValue(context, object);
 	}
 }