Error in apollo-angular-link-http-batch when changing headers

[Dragons0458]

Hello! when I try to change the headers of my requests to be able to put the apollo-angular-link-http-batch token it gives me an error which I do not get with apollo-angular-link-http. This is my code:

const http = from([
     setContext((operation, {headers}) => observableToPromise(angularFireAuth.idToken.pipe(
        map(token => ({
          headers: {
            ...headers,
            Authorization: token ? `Bearer ${token}` : null
          }
        }))
      ))),
      onError(error => store.dispatch(new actions.ChangeErrorAction(error))),
      httpBatchLink.create({
        uri: `${environment.http}://${rootPath}`
      })
    ]);

This is the error:

When I change the httpBatchLink variable to httpLink everything works normal, is it a bug in the library? Thank you very much!

[kamilkisiela]

A simple workaround:

import { HttpHeaders } from '@angular/common/http';

const http = from([
     setContext((operation, {headers}) => observableToPromise(angularFireAuth.idToken.pipe(
        map(token => ({
          headers: new HttpHeaders().set('Authorization', token ? `Bearer ${token}` : null)
        }))
      ))),
      onError(error => store.dispatch(new actions.ChangeErrorAction(error))),
      httpBatchLink.create({
        uri: `${environment.http}://${rootPath}`
      })
    ]);

[kamilkisiela]

Should fix it #1383