[ros2run]: Segmentation Fault

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Introduction

ROS2 (Robot Operating System 2) is a popular open-source software framework for building robot applications. However, users have reported a segmentation fault error when running the ros2 run command. In this article, we will investigate the possible causes of this issue and provide a solution.

Checks

Before we dive into the issue, let's perform some checks to ensure that this problem has not already been reported.

  • I have checked that this issue has not already been reported.
  • I have confirmed this bug exists on the latest version of pixi, using pixi --version.

Reproducible Example

To reproduce the issue, follow these steps:

  1. Create a new project using the following pixi.toml file:

[project] authors = ["xiaojx xiaojx@shanghaitech.edu.cn"] channels = ["robostack-staging", "conda-forge"] name = "ros2_xarm" platforms = ["linux-64"] version = "0.1.0"

[tasks]

[dependencies] ros-humble-desktop = ">=0.10.0,<0.11" ros-humble-turtlesim = ">=1.4.2,<2"


2.  Run the `ros2 run` command using the following command:

    ```bash
pixi run ros2 run turtlesim turtlesim_node

Issue Description

When running the ros2 run command, you will encounter a segmentation fault error. The error message will be:

[ros2run]: Segmentation fault

Possible Causes

Based on the error message, it is possible that the issue is related to the GPU drivers or the ROS2 installation. To investigate further, let's check the GPU drivers and the ROS2 installation.

Checking GPU Drivers

To check the GPU drivers, run the following command:

pixi shell
nvidia-smi

The output of the nvidia-smi command will provide information about the GPU drivers, including the version and the usage.

Output of nvidia-smi

Here is the output of the nvidia-smi command:

+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 550.120                Driver Version: 550.120        CUDA Version: 12.4     |
|-----------------------------------------+------------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id          Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |           Memory-Usage | GPU-Util  Compute M. |
|                                         |                        |               MIG M. |
|=========================================+========================+======================|
|   0  NVIDIA GeForce GTX 1060 3GB    Off |   00000000:01:00.0  On |                  N/A |
| 33%   29C    P8              9W /  120W |     486MiB /   3072MiB |      0%      Default |
|                                         |                        |                  N/A |
+-----------------------------------------+------------------------+----------------------+
                                                                                         
+-----------------------------------------------------------------------------------------+
| Processes:                                                                              |
|  GPU   GI   CI        PID   Type   Process name                              GPU Memory |
|        ID   ID                                                               Usage      |
|=========================================================================================|
|    0   N/A  N/A      2337      G   /usr/lib/xorg/Xorg                            214MiB |
|    0   N/A  N/A      2560      G   /usr/bin/gnome-shell                           29MiB |
|    0   N/A  N/A      3704      G   ...SingBox-linux-amd64/GUI.for.SingBox          1MiB |
|    0   N/A  N/A      3727      G   ...gnu/webkit2gtk-4.1/WebKitWebProcess          7MiB |
|    0   N/A  N/A      5123      G   ...sion,SpareRendererForSitePerProcess         82MiB |
|    0   N/A  N/A      9523      G   ...seed-version=20250307-130002.704000         93MiB |
|    0   N/A  N/A     11277      G   /proc/self/exe                                 50MiB |
+-----------------------------------------------------------------------------------------+

Expected Behavior

The expected behavior would be a window created.

Solution

Based on the output of the nvidia-smi command, it appears that the GPU drivers are installed correctly. However, the ROS2 installation may be the cause of the issue.

To resolve the issue, try the following steps:

  1. Update the ROS2 installation using the following command:

sudo apt update sudo apt install ros-humble-desktop


2.  Rebuild the ROS2 package using the following command:

    ```bash
rosdep install --from-paths src --ignore-src --rosdistro humble

  1. Run the ros2 run command again using the following command:

pixi run ros2 run turtlesim turtlesim_node


If the issue persists, try reinstalling the ROS2 package using the following command:

```bash
sudo apt purge ros-humble-desktop
sudo apt install ros-humble-desktop

Conclusion

Introduction

In our previous article, we investigated the possible causes of the segmentation fault error when running the ros2 run command. We provided a solution to resolve the issue and run the ros2 run command successfully. However, we understand that some users may still have questions about the issue. In this article, we will provide a Q&A section to address some of the common questions related to the segmentation fault error.

Q: What is a segmentation fault error?

A: A segmentation fault error is a type of error that occurs when a program attempts to access a memory location that it is not allowed to access. This can happen when a program tries to access a memory location that is outside the bounds of the program's memory space, or when a program tries to access a memory location that is already in use by another program.

Q: Why do I get a segmentation fault error when running the ros2 run command?

A: There are several reasons why you may get a segmentation fault error when running the ros2 run command. Some possible causes include:

  • The ROS2 installation is not properly configured.
  • The ROS2 package is not properly built.
  • The GPU drivers are not properly installed or configured.
  • The system is running low on memory or resources.

Q: How do I troubleshoot the segmentation fault error?

A: To troubleshoot the segmentation fault error, you can try the following steps:

  • Check the system logs for any error messages related to the ROS2 installation or the ros2 run command.
  • Check the ROS2 installation and package configuration to ensure that everything is properly set up.
  • Try running the ros2 run command with the --verbose flag to get more detailed error messages.
  • Try running the ros2 run command with a different ROS2 package or version to see if the issue is specific to a particular package or version.

Q: How do I resolve the segmentation fault error?

A: To resolve the segmentation fault error, you can try the following steps:

  • Update the ROS2 installation using the following command:

sudo apt update sudo apt install ros-humble-desktop


*   Rebuild the ROS2 package using the following command:

    ```bash
rosdep install --from-paths src --ignore-src --rosdistro humble

  • Run the ros2 run command again using the following command:

pixi run ros2 run turtlesim turtlesim_node


If the issue persists, try reinstalling the ROS2 package using the following command:

```bash
sudo apt purge ros-humble-desktop
sudo apt install ros-humble-desktop

Q: Can I prevent the segmentation fault error from occurring in the future?

A: Yes, you can prevent the segmentation fault error from occurring in the future by following these best practices:

  • Regularly update the ROS2 installation and package configuration to ensure that everything is properly set up.
  • Use the --verbose flag when running the ros2 run command to get more detailed error messages.
  • Use a different ROS2 package or version if the issue is specific to a particular package or version.
  • Monitor the system logs for any error messages related to the ROS2 installation or the ros2 run command.

Conclusion

In this article, we provided a Q&A section to address some of the common questions related to the segmentation fault error when running the ros2 run command. We hope that this article has been helpful in resolving any issues you may have encountered with the ros2 run command. If you have any further questions or concerns, please don't hesitate to contact us.