-e: see title, fails with build error
--works fine with just asm.js

-repro:
--create new project
--enable WASM and full exception support
--build for WebGL
--NOTICE it fails giving the following error:

Failed running "D:\Unity Installs\5.6.0f1\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\python.exe" "D:\Unity Installs\5.6.0f1\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\emcc" @"D:\Work\Bugs\WASM_Except\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
warning: unresolved symbol: glGetInternalformativwarning: unresolved symbol: _ZN4FMOD13DSPConnection6setMixEfwarning: unresolved symbol: glUnmapBufferwarning: unresolved symbol: glMapBufferRangewarning: unresolved symbol: glFlushMappedBufferRangeTraceback (most recent call last):