ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange
Ask Your Question
0

Stage segfaults at startup

asked 2011-03-10 07:52:39 -0600

Sagnik gravatar image

updated 2011-03-10 08:42:50 -0600

Eric Perko gravatar image

Hi Guys,

I wanted to modify stageros.cpp in a very minor way. I wanted the /odom topic to be published with a different name, so I went ahead and changed the string at the top of the file to "canbus". After rosmaking stage, it seg faults at startup. Even when I change the string "canbus" back to "odom" and rosmake it once again, it still seg faults.

I checked the seg fault issue of stage listed on the stage page on the ros site, but thats not the problem in my case.

Where am I going wrong ?

The backtrace is as follows,

Core was generated by `./stageros ../world/try.world'.
Program terminated with signal 11, Segmentation fault.
#0  boost::shared_ptr<ros::Publisher::Impl>::operator! (this=0x0, message=...) at /usr/include/boost/smart_ptr/detail/operator_bool.hpp:55
55          return px == 0;
(gdb) bt
#0  boost::shared_ptr<ros::Publisher::Impl>::operator! (this=0x0, message=...) at /usr/include/boost/smart_ptr/detail/operator_bool.hpp:55
#1  ros::Publisher::publish<nav_msgs::Odometry_<std::allocator<void> > > (this=0x0, message=...) at /opt/ros/cturtle/ros/core/roscpp/include/ros/publisher.h:95
#2  0x000000000040e7f1 in StageNode::WorldCallback (this=0x7fff89629870) at /opt/ros/cturtle/stacks/simulator_stage/stage/src/stageros.cpp:355
#3  0x000000000041c2ac in StageNode::s_update (world=<value optimized out>, node=0x1fae778) at /opt/ros/cturtle/stacks/simulator_stage/stage/src/stageros.cpp:88
#4  0x00007f38f712322e in Stg::World::CallUpdateCallbacks (this=0x13ca4d0) at /opt/ros/cturtle/stacks/simulator_stage/stage/build/Stage-3.2.2-Source/libstage/world.cc:481
#5  0x00007f38f7123604 in Stg::World::Update (this=0x13ca4d0) at /opt/ros/cturtle/stacks/simulator_stage/stage/build/Stage-3.2.2-Source/libstage/world.cc:552
#6  0x00007f38f713c501 in Stg::WorldGui::Update (this=0x13ca4d0) at /opt/ros/cturtle/stacks/simulator_stage/stage/build/Stage-3.2.2-Source/libstage/worldgui.cc:364
#7  0x00007f38f6a2f008 in Fl::wait(double) () from /usr/lib/libfltk.so.1.1
#8  0x0000000000414984 in main (argc=2, argv=<value optimized out>) at /opt/ros/cturtle/stacks/simulator_stage/stage/src/stageros.cpp:440

Thanks, Sagnik

edit retag flag offensive close merge delete

Comments

Can you post your modified version of the code (perhaps on pastebin or a gist on github or something)? And are you certain you didn't change anything but the topic name?
Eric Perko gravatar image Eric Perko  ( 2011-03-10 08:43:47 -0600 )edit
Ah, my bad.... I had modified another line unknowingly, and that was causing the seg fault. My apologies for asking the question without double-checking.
Sagnik gravatar image Sagnik  ( 2011-03-10 09:07:36 -0600 )edit

1 Answer

Sort by ยป oldest newest most voted
0

answered 2011-03-10 12:49:02 -0600

tfoote gravatar image

Closing as resolved by bad change in code. See comment above from @sagnik

For future reference if you want to change the topic on which something is published you should use topic remapping.

edit flag offensive delete link more

Question Tools

Stats

Asked: 2011-03-10 07:52:39 -0600

Seen: 461 times

Last updated: Mar 10 '11