Open Radar

 
Summary:
My Login Items have been corrupted; they show up as `Unknown` with a yellow explanation / warning symbol.  I am unable to delete Login Items from the System Preferences UI.  Editing `plist` files that have been previously associated with the Login Items preference pane has no effect.

Various OSX API's that attempt to read the users Login items are also failing.
A limited list of apps that are currently crashing because the API to fetch the user's login items is broken:

- Google Chrome
- Most apps based on google chrome / Github's eletron framework
- Viscosity vpn


Steps to Reproduce:

0) Be running macOS Sierra.
1) Upgrade to High Sierra


Expected Results:
I expect that my login items are not corrupted / lost / damaged.
I expect that the APIs built into OSX do not result in a crash.  Here is a truncated stack trace.  The same one (and similar ones) is available in the github issues link below.

```
OS Version:            Mac OS X 10.13 (17A405)

Time Awake Since Boot: 450 seconds

System Integrity Protection: enabled

Crashed Thread:        0  CrBrowserMain  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes:       0x0000000000000001, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Illegal instruction: 4
Termination Reason:    Namespace SIGNAL, Code 0x4
Terminating Process:   exc handler [0]

Application Specific Information:
*** CFEqual() called with NULL first argument ***

Thread 0 Crashed:: CrBrowserMain  Dispatch queue: com.apple.main-thread
0   com.apple.CoreFoundation      	0x00007fff4edbc73c CFEqual + 620
```


Actual Results:
When I click the `-` button on the system UI, i expect the `Unknown` entry to be removed.  It is not.  When i click the `Hide` check box, i get *another* `Unknown` entry in the list.

When I click the `-` Button in the UI, i see multiple lines in the `Console.app`.  They look like this:

```
### Error:18446744073709551581 File:/BuildRoot/Library/Caches/com.apple.xbs/Sources/AccountsPref/AccountsPref-285/LoginItem.m Line:68
```

and come from the `com.apple.preferences.users.remoteservice` process.




Version/Build:
OS Version:            Mac OS X 10.13 (17A405)


Configuration:
Here's some additional information documenting this problem:

https://github.com/electron/electron/issues/10561#issuecomment-334634029

https://discussions.apple.com/thread/8096021
https://discussions.apple.com/thread/8086931
https://discussions.apple.com/thread/8089760