Unreal Engine Project Builds on Linux Machines Fail When Sentry Plugin is Included

Oct 13, 2025 by talynt.org 107 views

Unreal Engine Project Builds on Linux Machines Fail When Sentry Plugin is Included

Unreal Engine is a powerful game engine used by developers to create high-quality games and interactive experiences. However, integrating third-party plugins can sometimes lead to issues, especially when building projects on Linux machines. In this article, we will explore a specific problem that occurs when using the Sentry plugin in Unreal Engine projects on Linux machines.

To reproduce the issue, we need to understand the environment in which it occurs. Here are the details:

Sentry: We are using Sentry SaaS (sentry.io) for crash reporting and error tracking.
SDK Version: The Sentry SDK version used is 0.22.0.
Installation: The Sentry package was installed from GitHub releases.
Unreal Engine Version: We are using Unreal Engine 5.5.1.
Build Machine: The issue occurs on a Linux machine, specifically when building a packaged game.

To reproduce the issue, follow these steps:

Add Sentry Plugin: Add the Sentry plugin to your Unreal Engine project.
Configure Sentry: Configure Sentry with auto symbol uploading enabled.
Build Packaged Game: Build a packaged game on a Linux machine.

The expected result is that Sentry successfully uploads debug symbols.

However, the actual result is that the build fails because Sentry tries to run an executable that does not exist: Plugins/Sentry/Binaries/Linux/crashpad_handler.

After investigating the issue, we found that the fix is to replace the Linux PostBuildStep in the uplugin with the following code:

"Linux": [
  "if [ $(TargetPlatform) = \"Linux\" ] && [ ! -f \"$(PluginDir)/Binaries/Linux/crashpad_handler\" ]; then\n
   cp \"$(PluginDir)/Source/ThirdParty/Mac/Linux/bin/*\" \"$(PluginDir)/Binaries/Linux/\"\n
  fi",
  "chmod +x $(PluginDir)/Binaries/Linux/crashpad_handler",
  "chmod +x $(PluginDir)/Scripts/upload-debug-symbols.sh",
  "if [ -f \"$(PluginDir)/Scripts/upload-debug-symbols.sh\" ]; then\n
   \"$(PluginDir)/Scripts/upload-debug-symbols.sh\" $(TargetPlatform) $(TargetName) $(TargetType) $(TargetConfiguration) \"$(ProjectDir)\" \"$(PluginDir)\"\n
  else\n
   echo \"Sentry: Symbol upload script is missing. Skipping post build step.\"\n
  fi"
],

This code checks if the crashpad_handler executable exists in the Binaries/Linux directory. If it does not exist, it copies the necessary files from the Source/ThirdParty/Mac/Linux/bin directory to the Binaries/Linux directory. It then sets the executable permissions for the crashpad_handler and upload-debug-symbols.sh scripts.

In conclusion, the issue with Unreal Engine project builds on Linux machines failing when the Sentry plugin is included can be fixed by replacing the Linux PostBuildStep in the uplugin with the code provided above. This fix ensures that the necessary files are copied to the Binaries/Linux directory and that the executable permissions are set correctly. If you are experiencing this issue, we recommend trying the fix and reporting any further issues through pull requests.

As we move forward with Sentry as our crash reporting platform, we intend to fork the Sentry repository and contribute back fixes like this through pull requests. However, as we are still in the evaluation phase, we have not forked and submoduled the repository yet. We hope that this article will help others who may be experiencing similar issues and encourage them to contribute to the Sentry project.
Unreal Engine Project Builds on Linux Machines Fail When Sentry Plugin is Included: Q&A

In our previous article, we explored the issue of Unreal Engine project builds on Linux machines failing when the Sentry plugin is included. We also provided a fix for the issue by replacing the Linux PostBuildStep in the uplugin with the code provided above. In this article, we will answer some frequently asked questions (FAQs) related to this issue.

A: The Sentry plugin is a third-party plugin used for crash reporting and error tracking in Unreal Engine projects. It is causing issues with Unreal Engine project builds on Linux machines because it tries to run an executable that does not exist: Plugins/Sentry/Binaries/Linux/crashpad_handler.

A: The fix for this issue is to replace the Linux PostBuildStep in the uplugin with the code provided above. This code checks if the crashpad_handler executable exists in the Binaries/Linux directory. If it does not exist, it copies the necessary files from the Source/ThirdParty/Mac/Linux/bin directory to the Binaries/Linux directory. It then sets the executable permissions for the crashpad_handler and upload-debug-symbols.sh scripts.

A: The crashpad_handler executable is not included in the Sentry plugin by default. It is located in the Source/ThirdParty/Mac/Linux/bin directory, which is not included in the plugin's binary directory. By copying the necessary files from this directory to the Binaries/Linux directory, we ensure that the crashpad_handler executable is available for the Sentry plugin to use.

A: The crashpad_handler and upload-debug-symbols.sh scripts need to have executable permissions in order to run correctly. By setting the executable permissions for these scripts, we ensure that they can be executed by the Sentry plugin.

A: If you are still experiencing issues with your Unreal Engine project builds on Linux machines after implementing the fix, we recommend checking the following:

Make sure that you have implemented the fix correctly by replacing the Linux PostBuildStep in the uplugin with the code provided above.
Check that the crashpad_handler executable exists in the Binaries/Linux directory.
Check that the upload-debug-symbols.sh script exists in the Scripts directory and has executable permissions.
Check that the Sentry plugin is configured correctly and that the auto symbol uploading feature is enabled.

In conclusion, the issue with Unreal Engine project builds on Linux machines failing when the Sentry plugin is included can be fixed by replacing the Linux PostBuildStep in the uplugin with the code provided above. We hope that this Q&A article has helped to clarify any questions you may have had about this issue and provided a solution to help you resolve it. If you have any further questions or concerns, please do not hesitate to contact us.