user.Logout caused app crash due to `libc++abi: terminating due to uncaught exception of type std::logic_error: Cannot start a sync session for user '' because this user has been removed.

[fuermosi777]

How frequently does the bug occur?

Always

Description

Followed in SwiftUI quick start guide but user.logout always crashes the app due to the error mentioned in the title.

Stacktrace & log output

libc++abi: terminating due to uncaught exception of type std::logic_error: Cannot start a sync session for user '64eacfbc24629d791762efd7' because this user has been removed.

Can you reproduce the bug?

Always

Reproduction Steps

1. Created a app following SwiftUI quick start.
2. Login anonymously
3. Logout

In the ContentView, I have the following code:

if let user = realmApp.currentUser, user.state != .removed {
  let config = user.flexibleSyncConfiguration(...)
  RealmSyncView()
        .environment(\.realmConfiguration, config)
} else {
  LoginView()
}

The LoginView() didn't show up when user.logout() is tapped. The app crashes.

Version

v10.42.0

What Atlas Services are you using?

Atlas Device Sync

Are you using encryption?

No

Platform OS and version(s)

iOS 16.4

Build environment

Xcode version: Version 14.3.1 (14E300c)
Dependency manager and version: ...

[fuermosi777]

And the error is also not thrown in app.syncManager.errorHandler, not sure if this is intended.

[nirinchev]

The error message could be improved, but you can't create a sync session for a logged-out user either. So the user.state check should instead look like user.state == .loggedIn.