From: Joel VanderWerf <vjoel@...>
Date: 2008-07-21T04:07:28+09:00
Subject: Re: Why Thread.abort_on_exception = yes doesn't show errors?

I単aki Baz Castillo wrote:
> - If a thread is joined then if that threads has a non handled exception the 
> program will exit (except if the main program handles that exception).
> 
> - If a thread is "abort_on_exception = true" then the program will fail in the 
> moment the thread fails (it makes sense).
> 
> - If a thead is "abort_on_exception = false" then nothing will occur if the 
> threads fails, and no error output will occur. WHY ???

That's all intended, IIUC. Point #1 above implies point #3: suppose 
threads _always_ reported exceptions. Then if you wrote a program to 
take advantage of #1 by harvesting finished threads and handling their 
exceptions in the main thread (or more generally the joining thread) you 
would have spurious exception dumping. You have more control this way, 
but you have to remember to either set abort_on_exception or to wrap 
your thread in a handler or to join the thread later. These are three 
styles, each of which has its place.

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407