The receiver of channel(multi to multi broadcast) will hang after disconnect untill another endpoint post a new message

[kipade]

To reproduce:

1. start first chat demo (mark c0)
2. start second chat demo (mark c1)
3. c1 post a message more than 59(>=60) characters
4. enter 'q' to c1 to make it being exit
   Now, c1 will be blocked in recv and could not exit until another client post a new message. And further more, will c1 was blocking, c0 could not exit by enter 'q', too

[mutouyun]

It's probably a bug. I'll check it out on the weekend.

[mutouyun]

This is a stupid bug... See attached patch for modifications.
6111722

I did not use Compiler Explorer to carefully analyze what happens with an uninitialized variable (yes, it's a ub) when gcc compiles this code.
However, the reason why this issue only occurs after 60 characters is related to the data_length configured in def.h.
I have submitted the fix to the master branch. You can pull it down to see if the issue still exists. Please let me know the results in a timely manner.

[kipade]

cool. It's OK now.