Promises not catched with Angular 6 & zonejs

[rweng]

So I got an Angular 6 application w/ zone.js@0.8.26 running in Chrome 67.

When I run the following code I get an error using worker-pouch

db.get('invalidbla').catch(e => console.log('catched'))

I get the following console output

> catched
> core.js:1624 ERROR Error: Uncaught (in promise): Object: {"error":"not_found","name":"not_found","reason":"missing","message":"missing","status":404}
    at resolvePromise (zone.js:814)
    at zone.js:724
    at zone.js:740
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke (zone.js:388)
    at Object.onInvoke (core.js:3757)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke (zone.js:387)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.run (zone.js:138)
    at zone.js:872
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)
    at Object.onInvokeTask (core.js:3748)
defaultErrorLogger @ core.js:1624
push../node_modules/@angular/core/fesm5/core.js.ErrorHandler.handleError @ core.js:1670
next @ core.js:4252
schedulerFn @ core.js:3488
push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.__tryOrUnsub @ Subscriber.js:195
push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.next @ Subscriber.js:133
push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber._next @ Subscriber.js:77
push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next @ Subscriber.js:54
push../node_modules/rxjs/_esm5/internal/Subject.js.Subject.next @ Subject.js:47
push../node_modules/@angular/core/fesm5/core.js.EventEmitter.emit @ core.js:3480
(anonymous) @ core.js:3779
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke @ zone.js:388
push../node_modules/zone.js/dist/zone.js.Zone.run @ zone.js:138
push../node_modules/@angular/core/fesm5/core.js.NgZone.runOutsideAngular @ core.js:3716
onHandleError @ core.js:3779
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.handleError @ zone.js:392
push../node_modules/zone.js/dist/zone.js.Zone.runGuarded @ zone.js:154
_loop_1 @ zone.js:677
api.microtaskDrainDone @ zone.js:686
drainMicroTaskQueue @ zone.js:602
push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask @ zone.js:500
invokeTask @ zone.js:1540
globalZoneAwareCallback @ zone.js:1566

When I run in with adapter: idb the output is just catched.

I am unsure how to continue debugging this though.

[HarelM]

+1.
When running the following code in incognito tab the error can be observed:
https://stackblitz.com/edit/angular-worker-pouch-working