Hi,
This looks like it is a bug in the client proxy, hopefully I will get a chance to look into it later today.

Toby

On 30/01/2008, Eshwaran VijayKumar <eshwaran.vijaykumar@gmail.com> wrote:
Hi again,
   
   I am using Player  2.1.0 rc1 and Stage 2.1.0 rc1. No I am not working with a real robot. Just the simulated robot. I have provided the gdb run and backtrace output:
--------------------------------------------------------------------------------------------------------------------------------------------------------
RUN OUTPUT
Starting program: /home/swarm/Desktop/player-2.1.0rc1/examples/libplayerc++/sonarobstacleavoid

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/ac/2eeb206486bb7315d6ac4cd64de0cb50838ff6.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/e8/38ce6093590b08883fd28e6008fb91964ef067.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/59/2af63ddff2a1ff221065e557f938cc2cb25cc7.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/88/27308433e33aeefb560f42fb133577c8936f20.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/92/8ab51a53627c59877a85dd9afecc1619ca866c.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/db/8cb95645d5df469d4aece301cdb5e60087be21.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/ba/4ea1118691c826426e9410cafb798f25cefad5.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/6c/1cdbb38ae2a292613c8c31195417ee80ea7e1e.debug
[Thread debugging using libthread_db enabled]
[New process 9865]

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/d0/b716d925c00494a40cff204a21530d0b96df8b.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/e3/3448de964a5ca97b70edbdcea227c6ea5d3657.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/04/aefaf601793e8d276f6b6c6f4da080babe3faf.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/07/b722c2a7fed5b96cf4b40ce0f2a06eb0f8d2fc.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/db/a292aff9720bfc3f25c53fa8e469168460a894.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/59/90d96516d0966b3e75c018e6129eee43965a6a.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/fa/4de2ee94deb82d3b7b6dddba32b4cbfb94dd8e.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/cc/a2a51671562775f944bce85a9476972b6994c8.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/03/5807c541381466da2f8457545e62c87066fd4f.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/90/ebf9c172c9332feed316b7c0fdff30ce1a15ae.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/8a/cc903fa48e73406552c64938e7866699a10801.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/54/97ce83a1cf21660e17bef3f4831e2f24afe795.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/41/b572ad1b8e3fac8fb0dadf6bcc2b61ef6e08a9.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/60/d593e7987c4f31a338bf509b15d713aa1fe1fb.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/7c/f32ecc91202c1747b80e3356a6828ae7ee97e7.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/13/e7ce3022231431f7402aed8afd467f81d091f0.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/0d/605d38e5e2d23fb14837dd95144b2d330b946c.debug

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/87/d66bafb3c5d1af9e5a91a447ef5efcc0a3ec3c.debug
[New Thread -1208792352 (LWP 9865)]

warning: Missing the separate debug info file: /usr/lib/debug/.build-id/a7/eabb854181ef5ff0c22b78c3e5048c64a2ebb8.debug
localhost: 6665

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208792352 (LWP 9865)]
0x08049f7d in PlayerCc::ClientProxy::GetVar<double> (this=0xbf9ebe88, aV=@0x10)
    at /home/swarm/player/include/player-2.1/libplayerc++/clientproxy.h:133
133           T v = aV;
----------------------------------------------------------------------------------------------------------------------------------------------------------

BACKTRACE OUTPUT:

#0  0x08049f7d in PlayerCc::ClientProxy::GetVar<double> (this=0xbf9ebe88,
    aV=@0x10)
    at /home/swarm/player/include/player-2.1/libplayerc++/clientproxy.h:133
#1  0x08049fc2 in PlayerCc::SonarProxy::GetScan (this=0xbf9ebe88, aIndex=2)
    at /home/swarm/player/include/player-2.1/libplayerc++/playerc++.h:2311
#2  0x08049fdc in PlayerCc::SonarProxy::operator[] (this=0xbf9ebe88, aIndex=2)
    at /home/swarm/player/include/player-2.1/libplayerc++/playerc++.h:2314
#3  0x080498f6 in main (argc=Cannot access memory at address 0x1
) at sonarobstacleavoid.cc:54


Thanks again. Sorry if the email is a bit long.

Regards
Eshwaran


On Jan 29, 2008 11:51 PM, Toby Collett <tcollett+player@plan9.net.nz> wrote:
A few things we need to know...
* what versions of player and stage are you using
* you talk about simple.cfg which implies a simulated robot, are you also working with a real robot?

also, can you provide a gdb backtrace of the segfault.

Toby

On 30/01/2008, Eshwaran VijayKumar <eshwaran.vijaykumar@gmail.com> wrote:
Hi,
 I have been trying to use the sonar interface with the pioneer2dx robot . However when i try to run ./sonarobstacleavoid after running the simple.cfg file i get an error as
 localhost : 6665
 Segmentation fault
 

Can any one help me out with this error? The strange thing is if I run both laserobstacleavoid and sonarobstacleavoid on the same robot using the simple.cfg file and shut down laserobstacleavoid after letting it run first. The sonar seems to be working ok.

Regards
Eshwaran
 

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