"_U.list is not a function" When debugging with elm 0.16

[burabure]

Updated to 0.16 and now I'm getting this error when debugging, I think it's a runtime error and not a compile time one. Non debugging compiles and runs fine.

[jvoigtlaender]

Are you sure that in addition to updating to 0.16, your ELM_HOME environment variable is also now pointing to 0.16's share directory, instead of still to 0.15's or 0.15.1's?

[burabure]

I thought that ELM_HOME wasn't needed for 0.16 (or at least that was the idea). having to check and set it every time is a downer =(

Anyways changed it to ~/.nvm/versions/node/v4.2.1/lib/node_modules/elm/Elm-Platform/0.16.0/share and it's still giving me the same error

[fredcy]

I'm also seeing a fatal "not a function" error in javascript console when using the 0.16 elm reactor in debug mode. I don't have ELM_HOME set. Running in Mac OS X with 0.16 installed from package.

[fredcy]

Seems to be happening at debug.js:9560:26.

Elm.Native.Slider.make = function(localRuntime) {

[burabure]

@fredcy I think you should try setting it. take a look at #131 (comment)

[fredcy]

I tried with ELM_HOME set (to /usr/local/share/elm) and I get the same error as before.

[jvoigtlaender]

@burabure, I also thought that 0.16 would obviate ELM_HOME. But this morning I learned that this will only happen with the next release of elm-reactor, probably in 0.16.1.

@fredcy, what are the contents of your /usr/local/share/elm? Is there a file /usr/local/share/elm/reactor/_reactor/debug.js?

[burabure]

@jvoigtlaender bummer =( Would uploading my code to a repo help you help me solving this error?

[jvoigtlaender]

I'm not really an expert in elm-reactor things (apart from managing its build plan etc. in https://github.com/elm-lang/elm-platform). Maybe @vilterp knows what happened to _U, specifically.

[fredcy]

Looks like a semi-colon is missing at debug.js:9637, the end of the Elm.Native.Slider.make function.

[burabure]

@fredcy looks fine to me

return localRuntime.Native.Slider.values = {
        slider: F2(slider)
    };

[fredcy]

https://github.com/elm-lang/elm-reactor/blob/0.16/frontend/Native/Slider.js

[fredcy]

If I patch debug.js to add that semicolon I get past the fatal "not a function" error.

But then I get an error about "up.props is undefined" appearing in the right pane of the reactor window. That's happening in the customButton() function.

https://github.com/elm-lang/core/issues/438

[jvoigtlaender]

@evancz, it seems elm-reactor as shipped with 0.16 is broken in debug mode.

[tcoopman]

I have the same error, installed 0.16 from npm on linux

[zilvinasu]

Same problem with 0.16 on Mac OS X

[tcoopman]

It looks like someone also has the problem with http://elm-lang.org/try: https://www.reddit.com/r/elm/comments/3tg8es/016_compiler_problem/

[evancz]

There is a new version of elm-reactor that is a ton better, so I am just going to focus on getting that ready real quick. There may be a week or two in the meantime, but if you are able to start tracking down the root issues here please do a PR and @ mention me.

[flip111]

@evancz what are the new features and/or improvements in the new version of the elm-reactor?

[jvoigtlaender]

@flip111, why is that relevant at this point? Isn't it more useful to get it fixed and released as soon as possible (then with a blog post advertising the improvements) than taking time now to detail the improvements here and now, for a limited audience?

[flip111]

it's not relevant, i was just curious ... perhaps there is a list somewhere already

[jvoigtlaender]

There are for sure discussions (and, if I remember correctly, mock ups of the UI) on one of the mailing lists.

[evancz]

So the root here was that ELM_HOME is still needed? If so, let's close it. This is going to be fixed in the next release of the platform, it cannot be done as a patch.

[burabure]

it was the missing semicolon that 6db89d0 solved, so we can close this =)

[evancz]

Cool, thanks for the report and for letting us know what happened in the end!

[milanvdm]

I still have this problem.

[jvoigtlaender]

@milanvdm, still? Have you re-installed 0.16 and the core package after Evan's fix?