Person who redacts a message has their read receipt disappear alongside the message

[turt2live]

Description

When someone redacts their message, their read receipt also disappears with it (if their read receipt was associated with it, such is the case if that was their most recent message).

Steps to reproduce

• Send a message (note that this now becomes your most recently read message)
• On another account, double check the read receipt is there
• Redact the message
• Note that the read receipt for the sender disappears

I would have expected their read receipt still stays linked to the message, as is the case with everyone else who has read up to that message.

Log: not sent

Above is a demonstration of the 'unexpected' behaviour: @Mikaela sent a message and Voyager (the blue airplane) saw it. Later on they redacted the message, but didn't send a later one until after my message 'sneaky'. Mikaela's avatar should have been next to the redacted message until they sent another message/read my message (at least).

Version information

• Platform: web (in-browser)
• Browser: Chrome 56
• OS: Windows 10
• URL: riot.im/develop

[turt2live]

This actually appears to be the person who performed the redaction has their RR disappear, not the person who sent the message. Was just a coincidence at the time of reporting.

Long shot guess of mine would be something to do with Riot unable to find the event after redacting and freaks out about sending the RR.

Title updated.

[turt2live]

RR disappears even if their most recent read message is not the one redacted:

• <someone> Hello world
• <someone else> Hello indeed
• <someone> redacts hello world
• RR disappears from hello indeed

[t3chguy]

I guess their RR is now pointing at their m.room.redaction event because of js-sdk's implicit RR calculations; I'll look into this

[t3chguy]

I was right :D
js-sdk needs to ignore m.room.redaction when synthesising RRs

[turt2live]

This seems to have gotten fixed (tested by sending a message on another account and redacting the message immediately after)

[t3chguy]

Yah fixed by above PR