Reference not allowed for not occurring events' Stream

[dj13may91]

Description:
Referencing is allowed for streams query under non occurring pattern

Affected Siddhi Version: 5.*

Steps to reproduce:
from every e1=TempStream[e1.roomNo == 1] → not TempStream[roomNo == 99 or deviceID == 10] for 5 min → e2=TempStream[e2.roomNo == 5] within 60 minutes

Here bold marked TempStream can't be referenced. Below query will result in error:
from every e1=TempStream[e2.roomNo == 1] → not e3=TempStream[roomNo == 99 or deviceID == 10] for 5 min → e2=TempStream[e2.roomNo == 5] within 60 minutes

[mohanvive]

@dj13may91 I have tested a similar query and it works fine (BTW, using alias 'e2' within the first pattern state is not correct) . States are sequential in a pattern query.

from every e1=TempStream[roomNo == 1] → not e3=TempStream[roomNo == 99 or deviceID == 10] for 5 min → e2=TempStream[e2.roomNo == 5] within 60 minutes

Can you please let us know what is your use case?
What is error that you got?

[dj13may91]

@mohanvine
Ya that e2 in first block was a copy paste mistake. But other than that the use case doesn't work when referencing a non occurring pattern.
Although, i got the logic that even if i get the reference what will i use it for as there is nothing happening in that particular reference stream .