Re: [DOH!] Apache 2 SEGVs during test run

[prev] [thread] [next] [Date index for 2005/01/25]

[don't forget to always reply to the list]

Dominique Quatravaux wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Stas Bekman wrote:
> 
> | what test has caused the segfault? can you do the verbose run of
> | that test?
> 
> Well I was able to reproduce that failure mode only twice, but one
> another run gave me a deep recursion in Compress::Zlib. So I
> recompiled Compress::Zlib from CPAN for the heck of it from CPAN and
> all my problems went away. Doh!

> | Dominique Quatravaux wrote:
> |
> |> Apache 2 SEGVs during the test run (see core dump at the end),
> |> then tests fail randomly (Failed 23/221 test scripts, [...]
> |> 77/2272 subtests).
> 
> I recompiled HTML::Parser and those went mostly away too. Double doh!
> Sorry for the fuss then.

OK, now I remember what the trace like you've posted:

(gdb) bt
#0  0x4030d4d1 in __read_nocancel () from /lib/tls/libpthread.so.0
#1  0x00000000 in ?? ()

means. It means that you've build your modules with ithreads enabled perl. 
Then you have built a new perl *without* ithreads. But you didn't nuke the 
old modules. Now when you try to run those, you get the above segfault. 
Certainly forcing a recompile of those solves the problem, as you've reported.

I've had a hell of segfaults when Mandrake cooker recently switched to a 
non-threaded perl (I had all Mandrake tools segfaulting, wtih the 
backtrace above).

> I still have a few test failures in t/apache/content_length_header.t
> (2 5 17), should I report those? (Basically my borged Apache from
> backports.org seems to behave like a 2.1 version, because if I reverse
> the test condition accordingly on lines 67 and 68 then tests 2 and 5
> start working OK).

Certainly.


        -- 
        __________________________________________________________________
Stas Bekman            JAm_pH ------> Just Another mod_perl Hacker
http://stason.org/     mod_perl Guide ---> http://perl.apache.org
mailto:stas@xxxxxx.xxx http://use.perl.org http://apacheweek.com
http://modperlbook.org http://apache.org   http://ticketmaster.com