Class 'Subject<T>' incorrectly extends base class 'Observable<T>'

[dhrn]

This is the error I am facing now:

dhrn@dhrn-Inspiron-5548:~/NativeApp/Supervisor$ tns run android

Searching for devices...
iTunes is not available for this operating system. You will not be able to work with connected iOS devices.
Executing before-prepare hook from /home/dhrn/NativeApp/Supervisor/hooks/before-prepare/nativescript-dev-typescript.js
Found peer TypeScript 2.4.1
node_modules/rxjs/Subject.d.ts(16,22): error TS2415: Class 'Subject<T>' incorrectly extends base class 'Observable<T>'.
  Types of property 'lift' are incompatible.
    Type '<R>(operator: Operator<T, R>) => Observable<T>' is not assignable to type '<R>(operator: Operator<T, R>) => Observable<R>'.
      Type 'Observable<T>' is not assignable to type 'Observable<R>'.
        Type 'T' is not assignable to type 'R'.

node_modules/tns-core-modules/ui/core/properties/properties.d.ts(48,14): error TS2559: Type 'Property<T, U>' has no properties in common with type 'TypedPropertyDescriptor<U>'.

node_modules/tns-core-modules/ui/core/properties/properties.d.ts(59,14): error TS2559: Type 'CoercibleProperty<T, U>' has no properties in common with type 'TypedPropertyDescriptor<U>'.

Unable to apply changes on device: 192.168.56.101:5555. Error is: TypeScript compiler failed with exit code 1.

My configuration:

{
	"description": "NativeScript Application",
	"license": "SEE LICENSE IN <your-license-filename>",
	"readme": "NativeScript Application",
	"repository": "<fill-your-repository-here>",
	"nativescript": {
		"id": "org.nativescript.supervisor",
		"tns-android": {
			"version": "3.1.1"
		}
	},
	"dependencies": {
		"@angular/common": "~4.0.0",
		"@angular/compiler": "~4.0.0",
		"@angular/core": "~4.0.0",
		"@angular/forms": "~4.0.0",
		"@angular/http": "~4.0.0",
		"@angular/platform-browser": "~4.0.0",
		"@angular/platform-browser-dynamic": "~4.0.0",
		"@angular/router": "~4.0.0",
		"nativescript-angular": "~3.0.0",
		"nativescript-telerik-ui": "^2.0.1",
		"nativescript-theme-core": "~1.0.4",
		"reflect-metadata": "~0.1.8",
		"rxjs": "~5.2.0",
		"tns-core-modules": "~3.0.0",
		"zone.js": "0.8.2"
	},
	"devDependencies": {
		"babel-traverse": "6.18.0",
		"babel-types": "6.18.0",
		"babylon": "6.13.1",
		"lazy": "1.0.11",
		"nativescript-dev-typescript": "^0.4.0",
		"typescript": "^2.3.2",
		"zone.js": "~0.7.2"
	}
}

Project Configuration:

dhrn@dhrn-Inspiron-5548:~/NativeApp/Supervisor$ tns info 
All NativeScript components versions information
┌──────────────────┬─────────────────┬────────────────┬───────────────┐
│ Component        │ Current version │ Latest version │ Information   │
│ nativescript     │ 3.1.1           │ 3.1.1          │ Up to date    │
│ tns-core-modules │ 3.1.0           │ 3.1.0          │ Up to date    │
│ tns-android      │ 3.1.1           │ 3.1.1          │ Up to date    │
│ tns-ios          │                 │ 3.1.0          │ Not installed │
└──────────────────┴─────────────────┴────────────────┴───────────────┘

Please kindly help me to fix this issue .

[shanke]

I have the same error. Creating a new project with this drawer template - it stops when trying to run ios emulator.

[jimport]

I've had the same issue. The first error (node_modules/rxjs/Subject.d.ts(16,22): error TS2415:) is related to a bug in rxjs. Reading through the comments, it looks like it is going to be fixed soon. Also a temporary workaround is provided (https://github.com/ReactiveX/rxjs/issues/2539): Add a augumentations.ts file to your project

// augmentations.ts
import {Operator} from 'rxjs/Operator';
import {Observable} from 'rxjs/Observable';

// TODO: Remove this when a stable release of RxJS without the bug is available.
declare module 'rxjs/Subject' {
  interface Subject<T> {
    lift<R>(operator: Operator<T, R>): Observable<R>;
  }
}

---

The other two errors are typescript 2.4 related. For me a workaround was to use:

"dependencies": {
  ...
  "rxjs": "5.4.1",
  ...
}
"devDependencies": {
  ...
  "typescript": "2.3.4",
  ...
}

Hope it helps. Cheers

[jimport]

It seems another option is to use the --noStrictGenericChecks compiler option in typescript 2.4.1. This should be a workaround for all three errors. But I didn't test it ...

[Iheb-miled]

add

{
    "compilerOptions": {
        "noStrictGenericChecks": true
    }
}

to your tsconfig.json