Cannot compile WebGL

Unity Engine
1

These are the error messages:

Failed running "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\python.exe" "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc" @"E:\UnityFiles\Haus\DasHaus\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
wrote symbol map file to E:\UnityFiles\Haus\DasHaus\Temp\StagingArea\Data\linkresult_asm\build.js.symbols
Traceback (most recent call last):
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc", line 13, in <module>
    emcc.run()
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc.py", line 1972, in run
    JSOptimizer.flush()
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc.py", line 1868, in flush
    run_passes(chunks[0], title, just_split=False, just_concat=False)
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc.py", line 1841, in run_passes
    final = shared.Building.js_optimizer(final, passes, debug_level >= 4, JSOptimizer.extra_info, just_split=just_split, just_concat=just_concat)
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\tools\shared.py", line 1828, in js_optimizer
    ret = js_optimizer.run(filename, passes, NODE_JS, debug, extra_info, just_split, just_concat)
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\tools\js_optimizer.py", line 559, in run
    return temp_files.run_and_clean(lambda: run_on_js(filename, passes, js_engine, source_map, extra_info, just_split, just_concat))
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\tools\tempfiles.py", line 78, in run_and_clean
    return func()
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\tools\js_optimizer.py", line 559, in <lambda>
    return temp_files.run_and_clean(lambda: run_on_js(filename, passes, js_engine, source_map, extra_info, just_split, just_concat))
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\tools\js_optimizer.py", line 451, in run_on_js
    filenames = pool.map(run_on_chunk, commands, chunksize=1)
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\lib\multiprocessing\pool.py", line 250, in map
    return self.map_async(func, iterable, chunksize).get()
  File "E:\Unity\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\lib\multiprocessing\pool.py", line 554, in get
    raise self._value
AssertionError: Error in optimizer (return code -1073740791):
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

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:408)
UnityEditor.WebGL.WebGlBuildPostprocessor.LinkBuild (BuildPostProcessArgs args) (at /Users/builduser/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:451)
UnityEditor.WebGL.WebGlBuildPostprocessor.PostProcess (BuildPostProcessArgs args) (at /Users/builduser/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:916)
UnityEditor.PostprocessBuildPlayer.Postprocess (BuildTargetGroup targetGroup, BuildTarget target, System.String installPath, System.String companyName, System.String productName, Int32 width, Int32 height, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.BuildReporting.BuildReport report) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:272)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Error building Player: 3 errors

Build completed with a result of 'Failed'
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

UnityEditor.BuildPlayerWindow+BuildMethodException: 4 errors
  at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (BuildPlayerOptions options) [0x0020e] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:181
  at UnityEditor.BuildPlayerWindow.CallBuildMethods (Boolean askForBuildLocation, BuildOptions defaultBuildOptions) [0x00065] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:88
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
2

could you please submit a bug report with a repro project and post the bug number here?

3

I sent a bug report using “Help->Report a bug” but I didn’t get a bug number…

4

you should get an email with that number to the email you used in the submission form

5

Yes: Case 1032579

6

What did you find out so far?

7

Me and my colleague have not been able to reproduce this ourselves. Your submitted project always build for us.

Does a WebGL build for an empty project also fail on your machine? If so can you try moving your project to the drive’s root folder like c:\MyProject and retry building then or alternatively also install Unity in the root folder for testing?

8

It works now.