Cannot read property 'question' of undefined #bug

[ittroller]

i had a bug when i close popup and call $toast.question to confirm close popup
but sometime, it dont work
step:

1. i have 1 popup show and 1 popup create (when i open popup show or popup create, i click button close, it work)
2. when i open popup show and click button "create" -> popup show is close and popup create open, in here, i click button close popup and it don't work (i want click button close popup, it will open confirm with toast question, but had error)

pls help