[mythtv] Ticket #1887: invalid PAT in recordings causes Frontend Crash, Backtrace Attached...

[Janne Grunau]

On Thursday 01 June 2006 07:23, MythTV wrote:
> #1887: invalid PAT in recordings causes Frontend Crash, Backtrace
> Attached...
> --------------------+------------------------------------------------
>------- Reporter:  jochen  |        Owner:  danielk
>      Type:  defect  |       Status:  new
>  Priority:  minor   |    Milestone:  0.20
> Component:  mythtv  |      Version:  head
>  Severity:  medium  |   Resolution:
> --------------------+------------------------------------------------
>------- Comment (by danielk):
>
>  Hmmm, could this be related to #1872?

I don't know. But the failures are different. Psofa's recordings 
(live-tv) get regular stopped by the missing frontend after the crash. 
He will post his backend logs.

>  Janne, a race condition in the PAT writing code seems unlikely.
> Except at startup when we get a PAT & PMT from the signal monitor, I
> believe all the processing is done in a single thread.

But an error in the transmitted stream seems at least equally unlikely. 
And the zero pid in the PAT is maybe an initialized value. But I should 
look at the code before making wild guesses.

>  I can fix the symptom by ignoring invalid PAT's in avlib, but we
> should try to figure out why this PAT is being created...

I agree. We should do both and fix the symptom only after we found the 
error in PAT creation. Even if the PAT is invalid, mythtv shouldn't 
crash.