[Rivet] Rivet 2.5.1 segfault on debian jessie

[David Bjergaard]

Hi,

I refuse to give up my old environment, and I figured it out:
> strace rivet
> [...]
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0ae3f9b000
> read(3, "00400000-0071f000 r-xp 00000000 "..., 1024) = 1024
> read(3, "home/dave/rivet/local/lib/libBOO"..., 1024) = 1024
> read(3, "fd3f000-7f0adfd43000 rw-p 000140"..., 1024) = 1024
> read(3, "ibssl.so.1.0.0\n7f0ae045a000-7f0a"..., 1024) = 1024
> read(3, "  /home/dave/rivet/local/lib/lib"..., 1024) = 1024
> read(3, "ib/libfastjetplugins.so.0.0.0\n7f"..., 1024) = 1024
> read(3, "922327                     /usr/"..., 1024) = 1024
> close(3)                                = 0
As soon as I saw libBOOSTFastJets.so I remembered that I had put a custom
wrapper around the fastjet contrib functions.  Removing it fixed the segfault. 

All's well that ends well, I've got a new version of Rivet working and I can be
on my merry way.

Also, can someone put a gdb prescription on the troubleshooting wiki?  I could
write a quick and dirty one.  This worked for me (finally):
gdb python
(gdb) run /path/to/rivet [rivet args] 

Its obvious in retrospect, but not at all when your not familiar with running
C++ in python. 


    David
    


Andy Buckley <andy.buckley at cern.ch> writes:

> Not sure what exactly went wrong for you, but my guess is that a
> Rivet*.so file from the old version was left in place somehow. And
> since it wasn't rebuilt with the new API, etc. its contents segfaulted
> on being dlopen()d / run.
>
> Best to install into a completely fresh area if possible, but a manual
> clear-out of Rivet*.so and .info etc. files from $prefix/lib and
> $prefix/share/Rivet is a good plan, as is removing the rivet directory
> and any .egg files in the $prefix/lib*/python*/site-packages
>
> Andy
>
>
> On 02/09/16 20:34, David Bjergaard wrote:
>> Hi Holger,
>>
>> As it turns out... I just launched rivetenv in a clean environment, and it
>> works.   This came about because I tried to upgrade from 2.4.something to 2.5.1,
>> and I didn't want to blow away all the generators I had installed, so I just
>> ran the bootstrap script without cleaning out the old install of rivet.
>>
>> I know that's a bit of a no-no, but the question is: can I keep my old
>> rivet/local prefix, or should I just re-install my old generators fresh wit the
>> new rivet?  I'm guessing do it all fresh since I know that the Rivet extensions
>> probably won't work anymore since they were linked with an older version of
>> rivet.
>>
>> Anyway, sorry for the noise, happy Friday,
>>
>>     David
>>
>> Holger Schulz <holger.schulz at durham.ac.uk> writes:
>>
>>> Hi David,
>>>
>>> could I ask you to dump the output of env after sourcing rivetenv to
>>> this thread?
>>>
>>>
>>> Thanks,
>>> Holger
>>>
>>>
>>> On 02/09/16 19:07, David Bjergaard wrote:
>>>> Hi,
>>>>
>>>> I'm trying to install the latest version of rivet and I'm having no luck. The
>>>> bootstrap script works great, it installs, and when I run rivetenv.sh and rivet
>>>> I get 'Segmentation Fault'.  I didn't dig too far into why (I still can't get
>>>> gdb to attach to rivet for the life of me).  Anyway, here's the relevant info:
>>>> wget http://rivet.hepforge.org/hg/bootstrap/raw-file/2.5.1/rivet-bootstrap
>>>> ./rivet-bootstrap
>>>>
>>>> dave at calypso:~/rivet-2.5/Rivet-2.5.1$ uname -a
>>>> Linux calypso 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt25-2+deb8u3 (2016-07-02) x86_64 GNU/Linux
>>>> dave at calypso:~/rivet-2.5/Rivet-2.5.1$ gcc --version
>>>> gcc (Debian 4.9.2-10) 4.9.2
>>>> Copyright (C) 2014 Free Software Foundation, Inc.
>>>> This is free software; see the source for copying conditions.  There is NO
>>>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>>>>
>>>> I would have assumed that this would have been sufficient (I know the compiler
>>>> is a bit old, but its still newer than lxplus).  I'm at your service for further
>>>> debugging.
>>>>
>>>> Cheers,
>>>>
>>>>     David
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