Problem with alert "input:" in io.read() call

[KataPi]

Hi daurnimator,
I'm not a programmer. I know js on a basic level and I'm learning Lua.
I love your work and it helps me to develop scripts locally.

Local and online (http://daurnimator.github.io/lua.vm.js/repl.html link from GitHub) when I call io.read() lua.vm.js returns me an allert window ("input: ") and then another one and then another one ...
mee=io.read() print(mee)

In google I found http://kripken.github.io/mloc_emscripten_talk/lua/repl.html#
This works well. In io.read () call it give me back only one alert. It works!
It's a bug? It's my browser??

Html from second link (http://kripken.github.io/mloc_emscripten_talk/lua/repl.html#) page not work in local with lua.vm.js from your GitHub.
What can I do?
Can you give me vm from http://kripken.github.io/mloc_emscripten_talk/lua/repl.html# ?
or can you fix vm in GitHub?

Tks
Kata

[daurnimator]

heh. I didn't even know stdin was hooked up to prompt.

Looks like this is an emscripten bug. I guess you'll have to file it over there? ping @kripken

[KataPi]

Hi daurnimator,
thanks for reply.

I do not think is an emscripten bug. In his page it works.
When I built/installed emscripten from your GitHub with make it gave me a lot of errors but my local page works as your web page, so I did not worry...

Your ping calls him on this issue?
Waiting @kripken ...

Tks
Kata

[kripken]

By default emscripten hooks up stdin to window.prompt, yes. It sounds like something changed in that handling, as an old version worked but not the new one? The best thing would be to bisect in both repos, I guess, to find out what changed.

[daurnimator]

@kripken Wouldn't it be bisecting emscripten that's helpful here?

As far as I can tell, it's something weird happening inside of fread/libc/syscall emulation, rather than in lua.vm.js.

[kripken]

Yes, but if you upgraded lua here, might need to bisect that too (might use different syscalls).