ChangeNotifier侦听器并进行处置。内存泄漏？

Question

我很好奇，如果创建新对象会删除所有附加的侦听器。 这是简单的代码：

org 0x7c00
bits 16
mov ax, HELLO_MSG ;Print a simple hello message :D
call _printString
xor ax, ax
;Here, we'll load the kernel into RAM
call LoadKernel
;Enter protected mode
call EnterProtMode

EnterProtMode:
    cli ;Disable interrupts
    lgdt [gdt_pointer] ;Load the GDT register with the start address of the GDT
    mov eax, cr0
    or al, 1 ;Set PE (protection enable) bit in CR0
    mov cr0, eax
    jmp 08h:Stage2 ;Jump to stage 2

LoadKernel:
    mov bx, KERNEL_OFFSET ;Load the kernel offset into bx
    mov dh, 16 ;Load 16 sectors 
    mov dl, [BOOT_DRIVE] ;The disk to read from
    call diskload ;Load the kernel
    ret

bits 32
KERNEL_OFFSET equ 0x1000
BOOT_DRIVE: db 0

Stage2:
    mov ax, DATA_SEG
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    mov ss, ax
    mov ebp, 0x90000
    mov esp, ebp
    ;Kernel entry here
    jmp KERNEL_OFFSET ;Call the kernel finally

%include 'boot/printUtils.asm'
%include 'boot/gdt.asm'
%include 'boot/diskload.asm'

HELLO_MSG: db "Booted successfully, loading kernel.", 0
times 510 - ($ - $$) db 0
dw 0xaa55