Steps to reproduce:
1. Open user-submitted project "ProjectQuestIon.zip"
2. Build for WebGL (make sure Linker Target is WebAssembly and Enable Exceptions is set to Full With Stacktrace)

Expected result: build does not fail
Actual result: build fails with the following error:

Failed running "X:\PATH_TO_UNITY\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\python.exe" "X:\PATH_TO_UNITY\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc" @ "X:\PATH_TO_ATTACHED_PROJECT\case_1032960-ProjectQuestIon\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` filewarning: unresolved symbol: openWindowTraceback (most recent call last): File "C:\Program Files\2018.1\2018.1.0f2_d4d99f31acba\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc", line 13, in <module> emcc.run() File "C:\Program Files\2018.1\2018.1.0f2_d4d99f31acba\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc.py", line 2145, in run subprocess.check_call(cmd) File "C:\Program Files\2018.1\2018.1.0f2_d4d99f31acba\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\lib\subprocess.py", line 542, in check_call raise CalledProcessError(retcode, cmd)subprocess.CalledProcessError: Command '[u'C:\\Program Files\\2018.1\\2018.1.0f2_d4d99f31acba\\Editor\\Data\\PlaybackEngines\\WebGLSupport\\BuildTools\\Emscripten_FastComp_Win\\binaryen\\bin\\asm2wasm', 'C:\\Users\\default.DESKTOP-AEA1AI9\\Desktop\\Week 19\\case_1032960-ProjectQuestIon\\Temp\\StagingArea\\Data\\linkresult_wasm\\build.asm.js', '--total-memory=536870912', '-O3', '--mem-init=C:\\Users\\default.DESKTOP-AEA1AI9\\Desktop\\Week 19\\case_1032960-ProjectQuestIon\\Temp\\StagingArea\\Data\\linkresult_wasm\\build.js.mem', '--mem-base=1024', '--wasm-only', '--symbolmap=C:\\Users\\default.DESKTOP-AEA1AI9\\Desktop\\Week 19\\case_1032960-ProjectQuestIon\\Temp\\StagingArea\\Data\\linkresult_wasm\\build.js.symbols', '-o', 'C:\\Users\\default.DESKTOP-AEA1AI9\\Desktop\\Week 19\\case_1032960-ProjectQuestIon\\Temp\\StagingArea\\Data\\linkresult_wasm\\build.wasm']' returned non-zero exit status -1073741571
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Reproduced with: 2017.2.0f3, 2017.3.1f1, 2017.4.4f1, 2018.1.0f2, 2018.2.0b6
Not reproduced with: 2018.2.X