[SharedCache] Crash in SymbolTableView constructor background thread

[WeiN76LQh]

Version and Platform (required):

• Binary Ninja Version: 4.3.6635-dev (6a04b0e5)
• OS: macOS
• OS Version: 15.1.1
• CPU Architecture: M1

Bug Description:
Closing a DSC triage view can cause a crash in the SymbolTableView constructor at the linked line. It appears to be a UAF due to the SymbolTableView being deleted and then the lambda being executed. BackgroundThread seems to state that it guarantees this can't happen by passing the SymbolTableView as the owner to the BackgroundThread. However, in this case, it seems to not be true. No idea why.

Steps To Reproduce:

1. Open a copy of DSC in Binary Ninja.
2. Open the DSCTraige/Dyld Shared Cache Triage view.
3. Split that view so it opens another DSCTraige/Dyld Shared Cache Triage view next to it and then immediately close the new one.
4. Wait for a bit, the crash should occur within 10 seconds, how long it takes can vary a bit.