angular-cli: --build-optimizer errors "Cannot read property 'type' of undefined"

I had a similar problem and solved it by replacing import { Observable } from 'rxjs/Rx'; with import { Observable } from 'rxjs/Observable';.

Same issue over here with "@angular/cli": "^1.5.0" @angular/compiler-cli": "^5.0.0"

try this

npm install typescript@latest

working fine!

@nmorenor You should NOT have any imports from ‘rxjs/Rx’

All imports should be like import { BlaBla } from 'rxjs/BlaBla'

or it also allows you to import operators like this: import 'rxjs/add/operator/blaperator';

Any attempt to

import { BlaBla } from 'rxjs/Rx' WILL FAIL to build with new flag!

Please reopen this issue @hansl

I habe the same issue with Angular CLI 1.3.0 and Angular 4.3.4 😦

ERROR in ./node_modules/rxjs/observable/BoundCallbackObservable.js Module build failed: TypeError: Cannot read property ‘type’ of undefined

Same warning as @MrBlaise & @

With Angular5, ng build --prod

with “typescript”: “2.5.0”

with “typescript”: “2.6.1”

Solution (with Warning): npm install typescript@latest

I have the same issue, version 1.3.0

Fixed by https://github.com/angular/devkit/pull/299, will be out on the next release.

It’s odd that the the versions of typescript that they recommend don’t actually work… I can also confirm bumping to Typescript 2.6.1 solved the issue.

Im getting same issue - but dont think the import is “mis-aligned”. Im using a 3rd party library which imports Observable bindCallback like this: import 'rxjs/add/observable/bindCallback';

and then my build results in:

ERROR in ./node_modules/rxjs/observable/BoundCallbackObservable.js
Module build failed: TypeError: Cannot read property 'type' of undefined
    at Object.getEffectiveTypeAnnotationNode (C:\dev\my-app\node_modules\typescript\lib\typescript.js:9341:17)
    at assignContextualParameterTypes (C:\dev\my-app\node_modules\typescript\lib\typescript.js:41652:25)
    at checkFunctionExpressionOrObjectLiteralMethod (C:\dev\my-app\node_modules\typescript\lib\typescript.js:41948:29)
    at checkExpressionWorker (C:\dev\my-app\node_modules\typescript\lib\typescript.js:42959:28)
    at checkExpression (C:\dev\my-app\node_modules\typescript\lib\typescript.js:42898:42)
    at checkExpressionCached (C:\dev\my-app\node_modules\typescript\lib\typescript.js:42779:38)
    at checkReturnStatement (C:\dev\my-app\node_modules\typescript\lib\typescript.js:45418:54)
    at checkSourceElement (C:\dev\my-app\node_modules\typescript\lib\typescript.js:46763:28)
    at Object.forEach (C:\dev\my-app\node_modules\typescript\lib\typescript.js:1506:30)
    at checkBlock (C:\dev\my-app\node_modules\typescript\lib\typescript.js:44563:16)
    at checkSourceElement (C:\dev\my-app\node_modules\typescript\lib\typescript.js:46742:28)
    at checkFunctionExpressionOrObjectLiteralMethodDeferred (C:\dev\my-app\node_modules\typescript\lib\typescript.js:41990:21)
    at checkDeferredNodes (C:\dev\my-app\node_modules\typescript\lib\typescript.js:46828:25)
    at checkSourceFileWorker (C:\dev\my-app\node_modules\typescript\lib\typescript.js:46863:17)
    at checkSourceFile (C:\dev\my-app\node_modules\typescript\lib\typescript.js:46842:13)
    at Object.forEach (C:\dev\my-app\node_modules\typescript\lib\typescript.js:1506:30)
 @ ./node_modules/rxjs/observable/bindCallback.js 2:32-68
 @ ./node_modules/rxjs/add/observable/bindCallback.js
 @ ./node_modules/ng2-adal/services/adal.service.js
 @ ./src/$$_gendir/app/app.module.ngfactory.ts
 @ ./src/main.ts
 @ multi ./src/main.ts

Encountered the same error, solved with upgrade to Typescript 2.6.1, disabled the Typescript mismatch warning in angular-cli.json

"warnings": { "typescriptMismatch": false }

However, this is concerning and it would be nice to know why the recommended Typescript version 2.4.2 is not working correctly with Angular 5.x + rxjs 5.5.2

I’m getting the same error when building and using a third party dependency ng2-responsive.

ERROR in ./node_modules/rxjs/observable/BoundNodeCallbackObservable.js
Module build failed: TypeError: Cannot read property 'type' of undefined
    at Object.getEffectiveTypeAnnotationNode (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:9341:17)
    at assignContextualParameterTypes (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:41652:25)
    at checkFunctionExpressionOrObjectLiteralMethod (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:41948:29)
    at checkExpressionWorker (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:42959:28)
    at checkExpression (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:42898:42)
    at checkExpressionCached (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:42779:38)
    at checkReturnStatement (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:45418:54)
    at checkSourceElement (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:46763:28)
    at Object.forEach (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:1506:30)
    at checkBlock (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:44563:16)
    at checkSourceElement (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:46742:28)
    at checkFunctionExpressionOrObjectLiteralMethodDeferred (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:41990:21)
    at checkDeferredNodes (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:46828:25)
    at checkSourceFileWorker (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:46863:17)
    at checkSourceFile (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:46842:13)
    at Object.forEach (/Users/crash/git/traveliko/traveliko-spa-frontend/node_modules/typescript/lib/typescript.js:1506:30)
 @ ./node_modules/rxjs/observable/bindNodeCallback.js 2:36-76
 @ ./node_modules/rxjs/add/observable/bindNodeCallback.js
 @ ./node_modules/rxjs/Rx.js
 @ ./node_modules/ng2-responsive/config/config.js
 @ ./src/$$_gendir/app/app.module.ngfactory.ts
 @ ./src/main.ts

@ multi ./src/main.ts

Upgrading typescript to 2.6.1 solved the problem. Not sure if there is a reason to look at cli warning about typescript

Solved: with : @angular/cli "^v1.5.0-rc.8

// import { Subject } from 'rxjs'; // bug: build optimizer
import { Subject } from 'rxjs/Subject'; // ng5 fix
import { Observable } from 'rxjs/Observable'; // ng5 fix
// import { BehaviorSubject, } from 'rxjs/BehaviorSubject'; // example

While a barrel import may be undesirable in some instances, you absolutely CAN have imports directly from “rxjs/Rx”. There’s no reason why these should fail.

@filipesilva @hansl Can this issue be re-opened?

@jinder well, I get that one if I use Angular 4.4.4 with the CLI 1.5.0-beta.3. If I use Angular 5 RC0 I get the weird typescript stack trace, which actually looking closer is different than in this issue:

ERROR in Error: TypeError: Cannot read property 'kind' of undefined
    at nodeCanBeDecorated (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:7934:35)
    at nodeIsDecorated (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:7954:16)
    at nodeOrChildIsDecorated (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:7958:16)
    at Object.forEach (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:1500:30)
    at Object.childIsDecorated (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:7964:27)
    at getClassFacts (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51492:20)
    at visitClassDeclaration (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51517:25)
    at visitTypeScript (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51376:28)
    at visitorWorker (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51189:24)
    at sourceElementVisitorWorker (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51221:28)
    at saveStateAndInvoke (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51133:27)
    at sourceElementVisitor (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51203:20)
    at visitNodes (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:49517:48)
    at Object.visitLexicalEnvironment (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:49550:22)
    at visitSourceFile (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51463:53)
    at saveStateAndInvoke (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51133:27)
    at transformSourceFile (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:51117:27)
    at /Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:2479:86
    at reduceLeft (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:2186:30)
    at /Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:2479:42
    at transformRoot (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:63992:82)
    at Object.map (/Users/hugo/pix4d/spa/node_modules/typescript/lib/typescript.js:1693:29)

I’ve already have the import {} from ‘rxjs/Rx’; form on all of the files of my project but I keep having the same error. Any ideas?

Fixed changing form es5 to “target”: “es6”, on tsconfig.json

no need to downgrade the typescript version

Upgraded to ng 5.0.0-rc.8 + cli 1.5.0-rc.6 => i get the same issue. Before that, was on ng rc.6 & cli rc 3, and no problem.

same here. Angular 5.0.0-beta.3 and CLI 1.3.0

“ERROR in ./node_modules/rxjs/observable/BoundCallbackObservable.js Module build failed: TypeError: Cannot read property ‘type’ of undefined”

only when adding --build-optimizer to my build command

I was running into the same issue, even with all the imports correct.

Upgrading TypeScript from 2.4.2 (default from Angular Cli) to 2.6.1 solved the issue without any other change.

After updating to Angular 5.0 and CLI 1.5 the problem si back: ./node_modules/rxjs/observable/BoundNodeCallbackObservable.js

i have to mention we haven’t migrated to “lettable operators” yet, so we have to import ‘rxjs/Rx’; in main.ts.

breaking change for me going from Angular 4 to Angular 5 when running “ng build --prod”. change import ‘rxjs/Rx’ to import ‘rxjs/add/operator/map’ and for all other operators, catch, map, etc.

On a new project, I added this to the start of src/main.ts:

import { Observable } from 'rxjs/Rx';
console.log(Observable);

Then ran ng build --prod --build-optimizer. I had no build errors.

Can someone give me repro steps to see the issue in 1.3.1 please? Also can you do npm ls @angular-devkit/build-optimizer and tell me what version is in your project?

The same issue here. Angular CLI 1.3 with latest libraries

ERROR in ./node_modules/rxjs/observable/BoundCallbackObservable.js Module build failed: TypeError: Cannot read property ‘type’ of undefined at Object.getEffectiveTypeAnnotationNode

I’ve solved it installing typescript@2.6.1

Hopefully this gets addressed as many projects will have third party dependencies that are still importing from “rxjs/Rx” and this will break your build following the guidelines the angular team has posted on updating your app.

They really should reopen this issue.

Importing from ‘rxjs/Observable’ will break webSocket functionality.

Hi there, thanks !

I had the same issue with angular 5 / cli 1.5 / typescript 2.4.2. Upgrading typescript to 2.6.1 also solved the problem, but the compiler shows a warning because it expects typescript >=2.4.2 and < 2.5.

@angular/compiler-cli@5.0.0 requires typescript@'>=2.4.2 <2.5.0' but 2.6.1 was found instead.
Using this version can result in undefined behaviour and difficult to debug problems.

Please run the following command to install a compatible version of TypeScript.

    npm install typescript@'>=2.4.2 <2.5.0'

To disable this warning run "ng set warnings.typescriptMismatch=false".

In our case, we got rid of this error by modifying a custom decorator which was receiving a lambda as a parameter. We moved the lambda into a named function and it started building.

I also encountered this error after upgrading to angular-cli 1.5, Angular 5, TypeScript 2.4 building with command: ng build -prod --extract-css --named-chunks (-prod should be the only relevant argument)

EDIT: My code is still using chained RxJS, nothing is using lettable operators. I’m still importing with ‘rxjs/add//’ in a single rxjs.import.ts file, which is imported by my SharedModule.

Upgrading to TypeScript 2.5 fixed the build!

I tried other solutions with TypeScript 2.4

• change import { X } from 'rxjs' to import { X } from 'rxjs/X'
• import 'rxjs/add/observable/bindNodeCallback';

But this didn’t work. I reverted the changes after upgrading to TypeScript 2.5 and the build continued to work. I think bindCallback/bindNodeCallback is a just a red herring, I think it may be an artifact of being one of the first files (due to a default alphabetic sort).

angular-cli prints a warning when using TypeScript 2.5, is there a reason not to use it?

This seems to be coming up again so I’m reopening. Can someone provide me with a reproduction please?

According to @rtm in https://github.com/angular/angular-cli/issues/7110#issuecomment-318429320 it might be related to rxjs imports:

I had a similar problem and solved it by replacing import { Observable } from 'rxjs/Rx'; with import { Observable } from 'rxjs/Observable';.

If someone can get me a repro with Angular 5.0.0-rc.9 + cli 1.5.0-rc.8 I’d love to take a look and try to fix it.

@filipesilva I just tried the same on a fresh @angular/cli 1.3.1 project and the one single thing I did to reproduce the error was to upgrade typescript from 2.3.4 to 2.4.2 and add the import like you did in src/main.ts.

Actually it’s even sufficient to import the following to reproduce the error:

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/bindNodeCallback';

console.log(Observable);

I resolved these errors by refactoring all the imports, some imports we had were from angular 2 time, they are now outdated, making sure there is no whole library import, just the object and operator you need. Like below. import {Subscription} from “rxjs/Subscription”; import ‘rxjs/add/operator/map’; import ‘rxjs/add/operator/take’; import ‘rxjs/add/operator/toPromise’;