_.mixin is not a function

[lazukars]

Node type: geth
OS: Ubuntu 14.04
Network type: main
Mist version: 0.0.0 ( On master branch. Pulled 04-05-16 )

I've followed the install instructions here, https://github.com/ethereum/mist, to a tee. When I run electron ., the following error occurs. Please see the screenshot.

[hiddentao]

I just tried this on the latest master and didn't see this error. I get the GUI showing up and sync begins.

[lazukars]

Hmm. Just tried pulling master again. I got the same issue. What OS did you try this on?

[hiddentao]

OS X El Capitan 10.11.2

[frozeman]

Can you try the wallet branch? that should have fixed it

[lazukars]

So it looks like this was an issue with electron. I was running the wrong version.

However, when running npm install -g electron-prebuilt@0.37.2, as instructions state, the error in the attached screenshot occurs.

Note: About a month ago, I had none of these issues, and Mist worked fine.

[hiddentao]

Could you try running npm cache clean and then again doing it? It looks like a possibly corrupted package.json in one of Electron's depenencies.

[hiddentao]

Also, npm uninstall -g electron-prebuilt followed the installation call again.

[lazukars]

I've done the following:

npm uninstall -g electron-prebuilt
npm cache clean which fixed that last screenshot error.
npm install -g electron-prebuilt@0.37.2
electron -v : output: v0.37.2

cd mist
git pull && git submodule update ( on master branch )
npm install
cd interface && meteor

Now, when running electron . inside the mist dir, I'm getting the initial issue error again, _.mixin is not a function. See initial screenshot. I've tried electron . --mode wallet as well. The same _.mixin is not a function occurs.

[hiddentao]

Could you try it on the develop branch please - that's always the actively developed branch. Just want to rule out branch differences.

[lazukars]

Sure. Just tried the same commands, from the last comment, on the develop branch. Outcome is the same: _.mixin is not a function when running electron .

[hiddentao]

Ok, can you check within node_modules to see if you have underscore installed. And if you do please tell us what the version number is from its package.json.

[lazukars]

Sure. In mist/node_modules/underscore/package.json. Looks to be v 1.8.3. See screenshot.

[hiddentao]

Great. Inside node_modules/underscore could you open up underscore.js and search for _.mixin to see if it exists.

If it does then the next step is to open up modules/utils/underscore.js and place the following code after the import at the top:

const _ = module.exports = require('underscore');

// code to insert:
console.log(_.VERSION, Object.keys(_));

Then run the app - this way we can make sure that the version of underscore being loaded at runtime is the same as what's installed. And it will also output what methods are available on the object.

[lazukars]

No problem. node_modules/underscore/underscore.js is an empty file

[hiddentao]

Ah so looks like underscore didn't install correctly. What I would do is remove your node_modules folder and re-run npm install.

[lazukars]

Ok. Doing what you suggested worked. When I pull down new code locally, is there some command that should be run so this issue can be avoided in the future? Or just delete the node_modules folder and run npm install after each pull?

There's a new problem now, once the _mixin problem was fixed. When I run electron . the UI loads for about 5 seconds and immediately crashes.

[hiddentao]

For the crash, if you're on the develop branch could you run: electron . --loglevel trace and paste the output in here. Might give us some clues.

As for the module issue, usually you shouldn't have to remove the node_modules folder everytime. It should just work. But if you encounter this again it's worth a try.

[lazukars]

Thanks for the tips. Here's the log trace:

I'm on the develop branch. It also crashes on the master branch.

[hiddentao]

Ok, this is hard to debug right now. We will hopefully be capturing UI logs too soon, see #502. In the meantime you could try stopping your existing geth instance and then running electron - it should start up its bundled copy of geth. Maybe that will make a difference.

[hiddentao]

Are you able to start the app in wallet mode?

[hiddentao]

I'm also having trouble starting in mist mode.

[lazukars]

Wallet mode opens, but it opens to a blank white screen, with the toolbar

on top.

Ryan Lazuka

[frozeman]

It seems something might be wrong with your web3.js you've pulled. Can you install web3@0.15.2 manually from inside your mist folder?

[lazukars]

Here's what I have done on the develop branch

cd mist/node_modules
rm -rf web3
cd .. && npm install web3@0.15.2
cd ~/mist/interface
meteor
cd ../ && electron .

Result: Same problem. The UI loads for about 5 seconds then crashes. I've tried stopping my geth instance, like previously suggest,and that does not work either and the results are the same.

[rolandkofler]

Maybe I'm the only one who didn't know it, but: the error occurs at Line 27 in mistUI.js

window.web3 = new Web3(new Web3.providers.IpcProvider('', ipcProviderWrapper));

More precisely when Web3 is instantiated (not when the IpcProvider is constructed).
I will continue with my research tomorrow afternoon, but if you have any idea would be great to hear it!

[hiddentao]

I don't seem to get an error at the Web3 construction point. Am still investigating.

[hiddentao]

I've narrowed it down to the window creation line:

global.mainWindow = new BrowserWindow({
            title: global.appName,
            show: false,
            width: 1024 + 208,
            height: 720,
            icon: global.icon,
            titleBarStyle: 'hidden-inset', //hidden-inset: more space
            backgroundColor: '#D2D2D2',
            acceptFirstMouse: true,
            darkTheme: true,
            webPreferences: {
                preload: __dirname +'/modules/preloader/mistUI.js',
                nodeIntegration: false,
                'overlay-scrollbars': true,
                webaudio: true,
                webgl: false,
                textAreasAreResizable: true,
                webSecurity: false // necessary to make routing work on file:// protocol
            }
        });

When I comment out the nodeIntegration line I don't get a crash - but I also just get a blank window. When I uncomment the line I start to see the UI contents show, but then the whole thing crashes.

[hiddentao]

So nodeIntegration must be disabled for the Meteor app to work, which means the Meteor app itself might be the cause - but then I'm still getting no errors from within.

[hiddentao]

Narrowed it down. The Mist interface shows a couple of default "tabs". One renders about:blank and the other shows http://ethereum-dapp-wallet.meteor.com. I actually am able to see neither tab but in any case the <webview> tag used to render about:blank doesn't work - and causes the whole app to crash. I suspect this is due to the fact that <webview /> actually launches the URL to be rendered into a new child process, see https://developer.chrome.com/apps/tags/webview

[hiddentao]

At least on my machine the <webview> tag fails to render and thus the Mist dapp content section is empty.

[hiddentao]

@frozeman Here is my proposed fix for this crash issue:

1. Change about:blank to ethereum.org for default browser tab in Mist.
2. Add command-line option to reset Mist interface tabs - I had to do this to get the webview working, as otherwise it keeps using what's in localforage. A command-line option is required since an in-app GUI option won't be usable if the app keeps crashing. We could still, however, add an in-app GUI option to reset the interface as this may be something people wish to use more than once.

[hiddentao]

PR in #548

[luclu]

PR merged.

[lock]

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