Re: [Playerstage-users] Local Communication Simulation in Stage

[Richard V. <rtv...@gm...>]

On Thu, Jun 11, 2009 at 7:57 AM, Michael Koval<kov...@gm...> wrote:
>
> Apologies in advance for the spam. I just stumbled across something from my
> notes from the issues I had installing Stage yesterday. On a hunch, I tried
> setting the LD_LIBRARY_PATH environmental variable instead of the STAGEPATH
> environmental variable (e.g. export LD_LIBRARY_PATH=/usr/local/lib).
>
> This fixed all of the missing library issues, but at a steep price: All of
> the worlds instantly segfault once again. Here is the error message and
> another GDB backtrace:
>

Do you have more than one copy of the Stage libraries lurking on your system?


> ## ERROR MESSAGE ##
> Stage 3.1.0
>  [Loading /home/ruser/stage/worlds/simple.world][Include
> pioneer.inc][Include map.inc][Include sick.inc]
> Segmentation fault
>
> ## GDB BACKTRACE ##
> #0  Stg::World::Raytrace (this=0x173c5a0, gpose=@0x1da9688, range=8,
>    func=0x7f6ec1bbc730 <laser_raytrace_match>, mod=0x1d94600, arg=0x0,
>    ztest=true) at /usr/include/c++/4.2/bits/stl_list.h:583
> #1  0x00007f6ec1bcf076 in Stg::World::Raytrace (this=0x234, rays=@0x1d94978)
>    at /home/ruser/stage/libstage/world.cc:615
> #2  0x00007f6ec1bbd168 in Stg::ModelLaser::Update (this=0x1d94600)
>    at /home/ruser/stage/libstage/model_laser.cc:318
> #3  0x00007f6ec1bb01a9 in Stg::Model::UpdateIfDue (this=0x1d94600)
>    at /home/ruser/stage/libstage/model.cc:715
> #4  0x00007f6ec1bcf20e in Stg::World::Update (this=0x173c5a0)
>    at /home/ruser/stage/libstage/world.cc:516
> #5  0x00007f6ec1bd4986 in Stg::WorldGui::Update (this=0x173c5a0)
>    at /home/ruser/stage/libstage/worldgui.cc:329
> #6  0x00007f6ec1bccfcc in Stg::World::UpdateAll ()
>    at /home/ruser/stage/libstage/world.cc:147
> #7  0x0000000000400f9c in main (argc=2, argv=0x7fffca014438)
>    at /home/ruser/stage/libstage/main.cc:100
>
> Thanks again for all of your assistance.
>
>
>
> Michael Koval wrote:
>>
>>
>>
>>> This looks like a compiler issue.. I am using c++ 4.2.4 on Ubuntu 8.4..
>>> Searching online does bring up some issues with the file stl_list.h in
>>> 4.3,
>>> though I am not sure how relevant they are.. So, upgrading to a newer
>>> version or downgrading to 4.2.x may solve your problem.. What OS are you
>>> using?
>>>
>> Ubuntu 9.04 (Jaunty) x64
>> gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4)
>> cmake version 2.6-patch 2
>>
>>
>>
>>> (1) I am using the player SVN rev 7715 and if you build and install it
>>> from
>>> source, you will automatically get the required standalone libraries.
>>> After
>>> this, recompile and install stage. This version uses CMake build system
>>> too.
>>>
>>> Any of the three options mentioned above will solve your problem, but you
>>> will end up with the segfault if you do not change your compiler before
>>> installing player/stage.
>>>
>> I downloaded and compiled Player SVN r7715 and patched Stage SVN r7729
>> with GCC/G++ v4.2.4. There were no compiler errors in Stage or Player -
>> however, ccmake complained about not detecting "WebSim". Searching the
>> Ubuntu Repo and Google both turned up nothing; I presume this is an
>> optional dependency required for some drivers?
>>
>> Switching to Player SVN r7715 and recompiling both Player and Stage also
>> fixed the Segfault error, so it is definitely related to GCC or GPP v4.3.
>> Unfortunately, I get new errors when running the tested worlds:
>>
>> simple.world & wifi.world: Failed to open "wander". Check that it can be
>> found by searching the directories in your STAGEPATH environment variable,
>> or the current directory if STAGEPATH is not set.
>>
>> fasr.world: Failed to open "source". Check that it can be found by
>> searching the directories in your STAGEPATH environment variable, or the
>> current directory if STAGEPATH is not set.
>>
>> In an attempt to resolve this issue, I checked my STAGEPATH environmental
>> variable (it wasn't set). I found the directory containing wander.so
>> (locate wander -> /usr/local/lib/wander.so) and added it to the STAGEPATH
>> variable (export STAGEPATH=/usr/local/lib). No luck.
>>
>> Next I tried removing the STAGEPATH variable (unset STAGEPATH) and
>> navigating into the same directory as wander.so (cd /usr/local/lib).
>> Running stage (stage ~/stage/worlds/*.world) resulted in no change.
>>
>> Thank you for all of your help so far...it seems like I am quite close to
>> having this working thanks to your advice. I would greatly appreciate any
>> further assistance you can offer.
>>
>> Thanks,
>> Mike
>>
>
> --
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>
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-- 
Richard Vaughan
Autonomy Lab / Computing Science / Simon Fraser University