WebGL build error in 5.6 problem with python script

Question

Unity recently added official Facebook WebGL and gameroom support, which is something that is greatly appreciated. I updated my project and built a WebGL build (which previously built just fine normally) to find it spit out an error and not make any files because the build failed. I've read around and apparently back in 2015 people were getting a similar error, so I've been trying every fix I can find in the book.

I've moved my project folder, messed with my environment variables, ran as administrator, downloaded the beta versions and tried them, installed python files, deleted python files, nothing seems to work. My game used to build to WebGL just fine because my team has been looking to focus on web development, and this has really just thrown a wrench in our plans. If anybody can decipher or send me a link to a thread where this was solved I would be very grateful, I've been googling for days.

Here's the two errors I get in the unity window when it finishes building:

 Exception: Failed building WebGL Player.
 UnityEditor.WebGL.ProgramUtils.StartProgramChecked (System.Diagnostics.ProcessStartInfo p) (at /Users/builduser/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/ProgramUtils.cs:48)
 UnityEditor.WebGL.WebGlBuildPostprocessor.EmscriptenLink (BuildPostProcessArgs args, Boolean wasmBuild, System.String sourceFiles, System.String sourceFilesHash) (at /Users/builduser/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:394)
 UnityEditor.WebGL.WebGlBuildPostprocessor.LinkBuild (BuildPostProcessArgs args) (at /Users/builduser/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:437)
 UnityEditor.WebGL.WebGlBuildPostprocessor.PostProcess (BuildPostProcessArgs args) (at /Users/builduser/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:872)
 UnityEditor.Facebook.BuildProcessor.PostProcess (BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/Facebook/Extensions/Managed/BuildProcessor.cs:117)
 UnityEditor.PostprocessBuildPlayer.Postprocess (BuildTargetGroup targetGroup, BuildTarget target, System.String installPath, System.String companyName, System.String productName, Int32 width, Int32 height, System.String downloadWebplayerUrl, System.String manualDownloadWebplayerUrl, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.BuildReporting.BuildReport report) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:186)
 UnityEditor.HostView:OnGUI()

and the second:

 Failed running "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\python.exe" "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc" @"D:\GrenadeTree\DuckDodge\Duck n' Dodge\Assets\..\Temp\emcc_arguments.resp"
 
 stdout:
 stderr:WARNING:root:--separate-asm works best when compiling to HTML. otherwise, you must yourself load the '.asm.js' file that is emitted separately, and must do so before loading the main '.js` file
 error: failure to execute js library "D:\GrenadeTree\DuckDodge\Duck n' Dodge\Assets\Plugins\WebGL\HandleIO.jslib": SyntaxError: Unexpected token {,,SyntaxError: Unexpected token {    at Object.LibraryManager.load (eval at globalEval (D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\src\compiler.js:105:8), <anonymous>:173:14)    at JSify (eval at globalEval (D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\src\compiler.js:105:8), <anonymous>:59:20)    at D:\GrenadeTree\DuckDodge\Duck n' Dodge\Assets\Plugins\WebGL\HandleIO.jslib (D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\src\compiler.js:208:3)    at Module._compile (module.js:460:26)    at Object.Module._extensions..js (module.js:478:10)    at Module.load (module.js:355:32)    at Function.Module._load (module.js:310:12)    at Function.Module.runMain (module.js:501:10)    at startup (node.js:129:16)    at node.js:814:3preprocessed source (you can run a js engine on this to get a clearer error message sometimes):=============var HandleIO = {    SyncFiles : Function () {        FS.syncfs(false, function (err) {            //handle callback        });    }}mergeInto (LibraryManager.library, HandleIO)=============Internal compiler error in src/compiler.js! Please raise a bug report at https://github.com/kripken/emscripten/issues/ with a log of the build and the input files used to run. Exception message: "SyntaxError: Unexpected token {" | SyntaxError: Unexpected token {    at Object.LibraryManager.load (eval at globalEval (D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\src\compiler.js:105:8), <anonymous>:173:14)    at JSify (eval at globalEval (D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\src\compiler.js:105:8), <anonymous>:59:20)    at Object.<anonymous> (D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\src\compiler.js:208:3)    at Module._compile (module.js:460:26)    at Object.Module._extensions..js (module.js:478:10)    at Module.load (module.js:355:32)    at Function.Module._load (module.js:310:12)    at Function.Module.runMain (module.js:501:10)    at startup (node.js:129:16)    at node.js:814:3Traceback (most recent call last):
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc", line 13, in <module>
     emcc.run()
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc.py", line 1661, in run
     final = shared.Building.emscripten(final, append_ext=False, extra_args=extra_args)
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\tools\shared.py", line 1745, in emscripten
     call_emscripten(cmdline)
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emscripten.py", line 1842, in _main
     temp_files.run_and_clean(lambda: main(
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\tools\tempfiles.py", line 78, in run_and_clean
     return func()
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emscripten.py", line 1847, in <lambda>
     DEBUG=DEBUG,
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emscripten.py", line 1748, in main
     temp_files=temp_files, DEBUG=DEBUG)
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emscripten.py", line 93, in emscript
     glue, forwarded_data = compiler_glue(metadata, settings, libraries, compiler_engine, temp_files, DEBUG)
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emscripten.py", line 296, in compiler_glue
     cwd=path_from_root('src'), error_limit=300)
   File "D:\Program Files (x86)\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\tools\jsrun.py", line 122, in run_js
     raise Exception('Expected the command ' + str(command) + ' to finish with return code ' + str(assert_returncode) + ', but it returned with code ' + str(proc.returncode) + ' instead! Output: ' + str(ret)[:error_limit])
 Exception: Expected the command ['D:/Program Files (x86)/Unity/Editor/Data\\Tools\\nodejs\\node.exe', '--stack_size=8192', '--max-old-space-size=2048', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\Emscripten\\src\\compiler.js', "D:\\GrenadeTree\\DuckDodge\\Duck n' Dodge\\Temp\\EmscriptenTemp\\tmpwmmmbe.txt", 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\Audio.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\Cursor.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\Eval.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\FileSystem.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\Logging.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\Profiler.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\SystemInfo.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\UnetWebSocket.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\Video.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\WebCam.js', 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\lib\\WebRequest.js', "D:\\GrenadeTree\\DuckDodge\\Duck n' Dodge\\Assets\\Plugins\\WebGL\\HandleIO.jslib", "D:\\GrenadeTree\\DuckDodge\\Duck n' Dodge\\Assets\\Plugins\\WebGL\\GameSparks.jslib", "D:\\GrenadeTree\\DuckDodge\\Duck n' Dodge\\Assets\\Plugins\\WebGL\\GameAnalyticsUnity.jslib", 'D:\\Program Files (x86)\\Unity\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\Emscripten\\src\\library_pthread_stub.js'] to finish with return code 0, but it returned with code 1 instead! Output: // The Module object: Our interface to the outside world. We import
 // and export values on it, and do the work to get that through
 // closure compiler if necessary. There are various ways Module can be used:
 // 1. Not defined. We create it here
 // 2. A function parameter, function(Module) { ..gener
 UnityEditor.HostView:OnGUI()

Is the new unity installer missing some file, or changed one it needs for webGL? I'm almost considering reverting back to an old version and just building for facebook the old way so it will work. Also, here's a link to where my game is now for the curious: http://www.indiedb.com/games/duck-n-dodge

Answer 1

Answer by Marco-Trivellato · Apr 13, 2017 at 09:05 AM

Looks like the problem might be in HandleIO.jslib:

HandleIO.jslib": SyntaxError: Unexpected token {,,

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Dragoan · Apr 14, 2017 at 12:12 AM 0

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Your mentioning of that led me to try some new things. I haven't been able to fix my problem, but I did find another threat that's kind of similar here: https://forum.unity3d.com/threads/webassembly-build-error.455761/

In it there's a dev that says they have a fix, but it's not applied yet. So I could wait for a new version of unity, or do you know anything about that particular file? It's really short, and when I tried to edit it, it crashed my machine, so I clearly need to know what that file is doing before changing it!

Answer 2

Answer by ypoeymirou · Apr 12, 2017 at 02:24 PM

Same issue on my side :-(

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Answer 3

Answer by Dragoan · Apr 27, 2017 at 07:31 AM

Aha, I have finally fixed my issue after many hours of reinstalling and testing webGL builds. My issue was in a file: Plugins/WebGL/HandleIO.jslib, and when I removed it the game was able to make a build. Finally!

It actually mentioned that file in my error log I had posted, but I thought it was a file inside of the python folders, turns out it wasn't. So if you have that error, try and search for that file, it seems to wreck stuff.

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Marco-Trivellato · Apr 27, 2017 at 08:04 AM 0

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HandleIO.jslib is what I mentioned in my Answer ;-)

Answer 4

Answer by DamiaBonet · Jul 26, 2017 at 10:17 PM

The solution is here!

https://youtu.be/lxD02XawLeQ

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Alienpope · Oct 12, 2017 at 11:36 AM 0

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it is not work !!

WebGL build error in 5.6 problem with python script

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