[Question] list index out of range when use page.go in modal

[refandas]

Question

I want to create a modal which is used to confirm something, then the page will be redirected to route "/". When the button from the modal is clicked, the redirection process is successful but get an error. How to solve this error?

Code sample

import flet as ft

def main(page: ft.Page):
    page.title = "Routes Example"

    def close_dlg(e):
        dlg_modal.open = False
        page.update()

    def open_dlg_modal(e):
        page.dialog = dlg_modal
        dlg_modal.open = True
        page.update()

    dlg_modal = ft.AlertDialog(
        modal=True,
        title=ft.Text("Please confirm"),
        content=ft.Text("Do you really want to back?"),
        actions=[
            ft.TextButton("Yes", on_click=lambda _: page.go("/")),
            ft.TextButton("No", on_click=close_dlg),
        ],
        actions_alignment=ft.MainAxisAlignment.END,
        on_dismiss=lambda e: print("Modal dialog dismissed!"),
    )

    def route_change(route):
        page.views.clear()
        page.views.append(
            ft.View(
                "/",
                [
                    ft.AppBar(title=ft.Text("Flet app"), bgcolor=ft.colors.SURFACE_VARIANT),
                    ft.ElevatedButton("Visit Store", on_click=lambda _: page.go("/store")),
                ],
            )
        )
        if page.route == "/store":
            page.views.append(
                ft.View(
                    "/store",
                    [
                        ft.AppBar(title=ft.Text("Store"), bgcolor=ft.colors.SURFACE_VARIANT),
                        ft.ElevatedButton("Go Home", on_click=open_dlg_modal),
                    ],
                )
            )
        page.update()

    def view_pop(view):
        page.views.pop()
        top_view = page.views[-1]
        page.go(top_view.route)

    page.on_route_change = route_change
    page.on_view_pop = view_pop
    page.go(page.route)


ft.app(target=main)

Error message

Modal dialog dismissed!
Exception in thread Thread-25 (__sync_handler):
Traceback (most recent call last):
  File "C:\Users\refandas\AppData\Local\Programs\Python\Python310\lib\threading.py", line 1009, in _bootstrap_inner
    self.run()
  File "C:\Users\refandas\AppData\Local\Programs\Python\Python310\lib\threading.py", line 946, in run
    self._target(*self._args, **self._kwargs)
  File "D:\Development\Python\env-webdev\lib\site-packages\flet_core\event_handler.py", line 28, in __sync_handler
    h(r)
  File "D:\Development\Python\flet-docs\routing\main.py", line 52, in view_pop
    top_view = page.views[-1]
IndexError: list index out of range

------------------------------------------------------

• I have searched for answers to my question both in the issues and in previous discussions.