Bug#775147: emscripten: does not work at all with optimization enabled

[Sylvestre Ledru]

On 12/01/2015 00:15, Riku Saikkonen wrote:
> In any case, this bug does appear to make real-world use of Debian's
> current emscripten package at least very difficult if not impossible -
> thus the release-critical bug severity. (Feel free to downgrade if you
> disagree, of course.)
>
Maybe it is better this way... We won't have emscripten in Debian Jessie
but the quality of the package is not at its best state.

emscripten developers implemented fastcomp, a LLVM backend. This requires
a patched version of LLVM and this could not go in Debian packages.
For more information:
http://kripken.github.io/emscripten-site/docs/building_from_source/LLVM-Backend.html

So, I shipped a version of emscripten forcing the fallback on the old
compiler, version which is not maintained upstream and it might be
causing your issue.

Anyway, I will try to play with the llvm versions to confirm that.

Cheers,
Sylvestre