cannot compile with grunt webpack-dev-server

[adubois-stingray]

I'm getting the following error after upgrading to webpack v2.2.0:

Running "webpack-dev-server:start" (webpack-dev-server) task
Verifying property webpack-dev-server.start exists in config...OK
File: [no files]
webpack-dev-server on port 3000
Fatal error: Cannot read property 'length' of undefined

version
webpack 2.2.0
grunt-webpack 2.0.0-beta.6
grunt 1.0.1
node 6.9.4
os win10

Please note that I'm able to run "grunt webpack --verbose" without error using same config.
Also, if I compile with npm "start": "webpack-dev-server --config ./config/webpack.dev.js", I have no error using the same config

Could you help me please ?

[nwoltman]

Could you run grunt webpack-dev-server:start --stack and then provide the stack trace from the error? Also, providing your configuration (or a minimal configuration that can reproduce the issue) would be very helpful for debugging.

[pratik-js]

I am facing same issue.

ui>grunt webpack-dev-server:start --stack
Running "webpack-dev-server:start" (webpack-dev-server) task
Warning: arguments[i].apply is not a function Use --force to continue.
TypeError: arguments[i].apply is not a function
at Compiler.apply (F:\git_green\ui\node_modules\tapable\lib\Tapable.js:306:16)
at webpack (F:\git_green\ui\node_modules\webpack\lib\webpack.js:32:19)
at Object.webpackDevServerTask (F:\git_green\ui\node_modules\grunt-webpack\tasks\webpack-dev-server.js:62:22)
at Object. (F:\git_green\ui\node_modules\grunt\lib\grunt\task.js:255:15)
at Object.thisTask.fn (F:\git_green\ui\node_modules\grunt\lib\grunt\task.js:73:16)
at Object.fn (F:\git_green\ui\node_modules\jit-grunt\lib\jit-grunt.js:126:30)
at Object. (F:\git_green\ui\node_modules\grunt\lib\util\task.js:294:30)
at Task.runTaskFn (F:\git_green\ui\node_modules\grunt\lib\util\task.js:244:24)
at Task. (F:\git_green\ui\node_modules\grunt\lib\util\task.js:293:12)
at Task.start (F:\git_green\ui\node_modules\grunt\lib\util\task.js:302:5)
at Object.grunt.tasks (F:\git_green\ui\node_modules\grunt\lib\grunt.js:155:8)
at Object.module.exports [as cli] (F:\git_green\ui\node_modules\grunt\lib\grunt\cli.js:27:9)
at Object. (C:\Users\pratik.patel\AppData\Roaming\npm\node_modules\grunt-cli\bin\grunt:44:20)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.runMain (module.js:604:10)
at run (bootstrap_node.js:394:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:509:3

[danez]

Fixed by #117

[adubois-stingray]

I don't think it's the same bug, I've tried the fix in #117 , but I still have the same problem

Here the call stack :

C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk>grunt webpack-dev-server:start --stack
Running "webpack-dev-server:start" (webpack-dev-server) task
webpack-dev-server on port 3000
Fatal error: Cannot read property 'length' of undefined
TypeError: Cannot read property 'length' of undefined
at getPaths (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\getPaths.js:30:20)
at Resolver. (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\ModulesInHierachicDirectoriesPlugin.js:23:15)
at Resolver.applyPluginsParallelBailResult1 (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\tapable\lib\Tapable.js:288:14)
at beforeInnerCallback (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\Resolver.js:112:19)
at loggingCallbackWrapper (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\createInnerCallback.js:31:19)
at Resolver.applyPluginsAsyncSeriesBailResult1 (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\tapable\lib\Tapable.js:181:46)
at Resolver.doResolve (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\Resolver.js:100:11)
at Resolver. (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\TryNextPlugin.js:18:12)
at Resolver.applyPluginsParallelBailResult1 (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\tapable\lib\Tapable.js:288:14)
at beforeInnerCallback (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\Resolver.js:112:19)
at loggingCallbackWrapper (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\createInnerCallback.js:31:19)
at Resolver.applyPluginsAsyncSeriesBailResult1 (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\tapable\lib\Tapable.js:181:46)
at Resolver.doResolve (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\Resolver.js:100:11)
at Resolver. (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\ModuleKindPlugin.js:20:12)
at Resolver.applyPluginsAsyncSeriesBailResult1 (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\tapable\lib\Tapable.js:192:13)
at innerCallback (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\Resolver.js:125:19)
at loggingCallbackWrapper (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\createInnerCallback.js:31:19)
at C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\tapable\lib\Tapable.js:283:15
at Resolver. (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\ConcordModulesPlugin.js:25:28)
at Resolver.applyPluginsParallelBailResult1 (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\tapable\lib\Tapable.js:288:14)
at beforeInnerCallback (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\Resolver.js:112:19)
at loggingCallbackWrapper (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\createInnerCallback.js:31:19)
at Resolver.applyPluginsAsyncSeriesBailResult1 (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\tapable\lib\Tapable.js:181:46)
at Resolver.doResolve (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\Resolver.js:100:11)
at C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\DescriptionFilePlugin.js:40:13
at C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\DescriptionFileUtils.js:49:12
at C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\forEachBail.js:29:14
at onJson (C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\DescriptionFileUtils.js:40:5)
at C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\DescriptionFileUtils.js:18:6
at C:\dev\Projects\HTML5\StingrayMusicWebPlayer\trunk\node_modules\enhanced-resolve\lib\CachedInputFileSystem.js:62:14
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickCallback (internal/process/next_tick.js:98:9)

I also added a log in node_modules/enhanced-resolve/lib/getPaths.js to see what's the incorrect path, I have this logs:

Running "webpack-dev-server:start" (webpack-dev-server) task
webpack-dev-server on port 3000
path: ./src/polyfills.ts
path: ./src/polyfills.ts*
path: ./src/polyfills.ts.ts
path: ./src/polyfills.ts.js
path: ./src/vendor.ts
path: ./src/vendor.ts*
path: ./src/vendor.ts.ts
path: ./src/vendor.ts.js
path: ./src/app/main.ts
path: ./src/app/main.ts*
path: ./src/app/main.ts.ts
path: ./src/app/main.ts.js
path: ./src/app/init.ts
path: ./src/app/init.ts*
path: ./src/app/init.ts.ts
path: ./src/app/init.ts.js
path: .
Fatal error: Cannot read property 'length' of undefined

I also attached my config files

configs.zip

[danez]

Can you try removing the default options?

516a02b

[adubois-stingray]

If if do the change of 516a02b, everythings look good, thanks :)

[danez]

Okay I released 2.0.1 with this fix. Thanks for reporting.