Mailing List Archive: 49091 messages
  • Home
  • Script library
  • AltME Archive
  • Mailing list
  • Articles Index
  • Site search
 

[REBOL] Re: How safe is catch []

From: volker:nitsch:gm:ail at: 25-Apr-2005 12:33

Just curious: can you throw something? not if .. [thow] but if .. [throw 'dummy] maybe there is the bug in 'throw. On 4/25/05, Anton Reisacher <[sqlab--gmx--net]> wrote:
> How safe is catch? > > I have some rebol applications serving message communication (around 1000 to > 2000 messages per day mostly) running for more than half a year on > Windows2000 Server without interruption since the last update of the OS for > security reasons. > > Recently I had to add some message splitting: > one-message --> [message-part-1 message-part-2 message-part-3] > > I used a construct similar to this > > forever [ > until [new-messages-available] > foreach message new-messages [ > catch [ > if not important [throw] > do-some-heavy-message-processing-and data-completion-using-odbc > if some-tests [throw] > message-parts: split-messages message > until [ > catch [ > message: first message-parts > do-more-conversions > if other-tests [throw] > deliver message > emtpy? message-parts: next message-parts > ] > ] > ] > ] > ] > > Now I saw two crashes in one day. > I was somehow able to reproduce the crash > "Invalid data type during recycle" > by playing again the history of one to two weeks. But the crash happened > always processing another message. > > As I had seen in the past instable behaviour with constructs like this > foreach ... [ > catch [ > .. > data: any [ > a > b > throw > ] > .. > .. > ] > ] > > I replaced the inner catch with statements like this > if not other-tests [ > deliver message > ] > and the crash went away. > > Now I am curious if someone else encountered the same behaviour too? > > -- > +++ GMX - Die erste Adresse f=FCr Mail, Message, More +++ > > 1 GB Mailbox bereits in GMX FreeMail http://www.gmx.net/de/go/mail > -- > To unsubscribe from the list, just send an email to > lists at rebol.com with unsubscribe as the subject. >
-- -Volker Any problem in computer science can be solved with another layer of indirection. But that usually will create another problem. David Wheeler