TypeError：“ this.validator不是函数”完成时未释放错误回调

Question

这是堆栈跟踪：

 TypeError: this.validator is not a function            app.component.ts:35
  at FormControl.AbstractControl._runValidator (forms.es5.js:2720)
  at FormControl.AbstractControl.updateValueAndValidity (forms.es5.js:2688)
  at new FormControl (forms.es5.js:3011)
  at FormBuilder.control (forms.es5.js:5863)
  at FormBuilder._createControl (forms.es5.js:5905)
  at eval (forms.es5.js:5887)
  at Array.forEach (<anonymous>)
  at FormBuilder._reduceControls (forms.es5.js:5886)
  at FormBuilder.group (forms.es5.js:5845)
  at ProfileSettingsComponent.init (profile-settings.component.ts:318)

打开用户设置页面时出现此错误。正如您可以在profile-settings.componenet.ts中的第318行的堆栈跟踪中看到的那样，只有FormBuilder的第一行。而且我不明白FormBuilder和在app.componenet.ts中获取用户对象之间是什么关系。

app.component.ts：

this.sub = this.userService.getLoggedUser()
  .subscribe(res => {
    console.info('From app: ', res.body.user);
    this.loadVideoChatInviter = true;
  }, err => {
    console.error(err); // line 35
  });

profile-settings.component.ts：

this.userSettingsToUpdate = this.fb.group({ // line 318
  'firstName': this.user.firstName,
  'lastName': this.user.lastName,
  'email': this.user.email,
  'gender': this.genderItems,
  // ... 
  'newPassword': ['', Validators.minLength(6)],
  'confirmedPassword': ['', Validators.minLength(6)],
  // ...
});