Stack trace `emcc hello_world.bc`

gistfile1.txt

undefined:175
    return typeData.flatSize*8;
                   ^
TypeError: Cannot read property 'flatSize' of undefined
    at getBits (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:175:20)
    at isIllegalType (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:181:14)
    at parseNumerical (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:809:39)
    at parseParamTokens (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:391:28)
    at Object.substrate.addActor.processItem (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:553:20)
    at Object._lineSplitter [as processItem] (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:118:35)
    at Object.Actor.process (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:248:26)
    at Object.Substrate.solve (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:184:25)
    at intertyper (eval at globalEval (/Users/Nicholas/mozilla/emscripten/src/compiler.js:105:8), <anonymous>:1028:20)
    at runPhase (/Users/Nicholas/mozilla/emscripten/src/compiler.js:248:22)
Traceback (most recent call last):
  File "/Users/Nicholas/mozilla/emscripten/emscripten.py", line 688, in <module>
    _main(environ=os.environ)
  File "/Users/Nicholas/mozilla/emscripten/emscripten.py", line 676, in _main
    temp_files.run_and_clean(lambda: main(
  File "/Users/Nicholas/mozilla/emscripten/tools/tempfiles.py", line 38, in run_and_clean
    return func()
  File "/Users/Nicholas/mozilla/emscripten/emscripten.py", line 684, in <lambda>
    DEBUG_CACHE=DEBUG_CACHE,
  File "/Users/Nicholas/mozilla/emscripten/emscripten.py", line 574, in main
    jcache=jcache, temp_files=temp_files, DEBUG=DEBUG, DEBUG_CACHE=DEBUG_CACHE)
  File "/Users/Nicholas/mozilla/emscripten/emscripten.py", line 160, in emscript
    pre, forwarded_data = out.split('//FORWARDED_DATA:')
ValueError: need more than 1 value to unpack
Traceback (most recent call last):
  File "/usr/local/bin/emcc", line 1239, in <module>
    final = shared.Building.emscripten(final, append_ext=False, extra_args=extra_args)
  File "/Users/Nicholas/mozilla/emscripten/tools/shared.py", line 947, in emscripten
    assert os.path.exists(filename + '.o.js') and len(open(filename + '.o.js', 'r').read()) > 0, 'Emscripten failed to generate .js: ' + str(compiler_output)
AssertionError: Emscripten failed to generate .js: