Error does not go to the second subscriber's error handler if the first subscriber does not have an error handler

[Gebov]

RxJS version:
5.5.2

Code to reproduce:
https://plnkr.co/edit/nwLQGmm4DtyOczbKPxfd?p=preview

Expected behavior:
Expecting that the second subscriber's error handler will get called, even if the first one is not there.
Actual behavior:
The second subsriber's error handler does not get called.

Additional information:

[jayphelps]

Hey @Gebov, actually not a bug in v5 but v6 will change this behavior at the expense of unhandled errors not being rethrown. The topic is pretty confusing 😞 See #2145 and for v6 #3062

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.