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Fixed in 2021.3.14f1, 2022.1.23f1, 2022.2.0b15, 2023.1.0a18



Found in


Issue ID




Give error when building WebGL on CentOS7



How to reproduce:
1. Open attached project
2. Change platform to WebGL
3. Build and run

Console is filled with errors:
Building Library/Bee/artifacts/WebGL/GameAssembly/master_WebGL_wasm/bgiy_gistration.o failed with output:
Traceback (most recent call last):
File "/home/justas/Unity/Hub/Editor/2021.2.0b11/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/emscripten/", line 116, in <module>
returncode = run(cmd)
File "/home/justas/Unity/Hub/Editor/2021.2.0b11/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/emscripten/", line 70, in run
cmd = cmd\[:2] + \['@' + create_response_file(cmd\[2:])]
File "/home/justas/Unity/Hub/Editor/2021.2.0b11/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/emscripten/", line 61, in create_response_file
with os.fdopen(response_fd, 'w', encoding='utf-8' if WINDOWS else None) as f:
TypeError: fdopen() takes no keyword arguments
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /home/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)

and finishes with:
BuildFailedException: Incremental Player build failed\!
UnityEditor.Modules.BeeBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /home/bokken/buildslave/unity/build/Editor/Mono/Modules/BeeBuildPostprocessor.cs:551)
UnityEditor.WebGL.WebGlBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:157)
UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at /home/bokken/buildslave/unity/build/Editor/Mono/Modules/DefaultBuildPostprocessor.cs:28)
UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.Int32 subtarget, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at /home/bokken/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:370)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /home/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)

Reproduced with: 2021.2, 2022.1

  1. Resolution Note (fix version 2023.1.0a18):

    With Unity 2021.2 and later we only support WebGL builds with the Linux Editor on Linux distributions which include glibc 2.27 or later (i.e. Ubuntu 18+)

  2. Resolution Note (fix version 2022.2.0b15):

    Fixed in 2022.2.0b15

  3. Resolution Note (fix version 2022.1.23f1):

    Fixed in 2022.1.23f1

  4. Resolution Note (fix version 2021.3.14f1):

    Fixed in 2021.3.14f1

Comments (4)


    Dec 30, 2021 13:31

    I have same issue for Android build. Using Unity 2021.2.7f1.

  2. Abed_Kadah

    Dec 20, 2021 09:03

    Same issue here (same error), I hope we will get a fix very quick.

  3. mgazillion

    Dec 19, 2021 22:06

    Same issue.
    I'm not sure why it's happening because it's just stating the location of the errors, not telling me why they're coming up.

  4. Okeir

    Nov 26, 2021 04:46

    Having a similar issue, in my case it is complaining about a missing 'Unity.Collections.LowLevel.Unsafe.AtomicSafetyHandle'. It works well when compiled for desktop platform. I'm using MacOS - M1 Chip.

    Did you manage to resolve it?

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