[erlang-questions] Why does this not work in the latest otp

Raimo Niskanen <>
Wed Jul 8 10:42:37 CEST 2009


On Fri, Jun 26, 2009 at 02:58:11PM +0200, Raimo Niskanen wrote:
> Congratulations, you have found a serious bug in
> the new atom cache code!
> 
> Simply when sending [] (the empty list) as the _complete_
> message to a remote process, decoding fails in R13B01.
> That is serious and it is interesting to note that
> sending [] as the complete message between remote
> processes must be _very_ uncommon, oddly enough.
> You are the only one so far that has encountered it.
> 
> The developer that wrote the new atom cache (now on vacation)
> has given me a two-line patch to regression test. First shot
> on one platform works fine and I do not expect any problems.
> Next week I will post the patch if the regression tests run fine.

Sorry about the delay.

I had almost totally unrelated problems in the regression tests.
(caused by the same developer, otherwise totally unrelated).
But here is the two-line patch (attached). It works fine
in our regression tests (when they run).

> 
> 
> 
> On Wed, Jun 24, 2009 at 03:17:02PM +0100, Thomas James Malone wrote:
> > 
> > 
> > If I use the module I have included as an attachement and run the  
> > following code in R13B01,
> > 
> > db_dis:new(database, ).
> > db_dis:write(tom, london, database, ).
> > db_dis:write(stuart, london, database, ).
> > db_dis:match(tom, database, ).
> > 
> > 
> > =ERROR REPORT==== 24-Jun-2009::15:13:11 ===
> > '' got a corrupted external term from '' on  
> > distribution channel 5571
> > <<...,106>>
> > ATOM_CACHE_REF translations: 0='', 1=''
> > timeout
> > 
> > In R12B-5 if  run the same code I get my expected response of []
> > 
> > what am I missing.
> > 
> > thanks in advance
> > 
> > Tom
> 
> > 
> > ________________________________________________________________
> > erlang-questions mailing list. See http://www.erlang.org/faq.html
> > erlang-questions (at) erlang.org
> 
> -- 
> 
> / Raimo Niskanen, Erlang/OTP, Ericsson AB
> 
> ________________________________________________________________
> erlang-questions mailing list. See http://www.erlang.org/faq.html
> erlang-questions (at) erlang.org

-- 

/ Raimo Niskanen, Erlang/OTP, Ericsson AB
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