System-wide freeze after trying to quit after running it for some time

[siraben]

Not sure how to replicate but I get a system-wide freeze + relog when I attempt to quit the app. I have a crash log for one of the instances here, but I don't think it contains anything useful.

crash-jan-23.txt

❯ uname -srv
Darwin 25.2.0 Darwin Kernel Version 25.2.0: Tue Nov 18 21:03:25 PST 2025; root:xnu-12377.61.12~1/RELEASE_ARM64_T8122

[siraben]

This is what Claude says:

⏺ Based on my analysis:                                                                                                                               
                                                                                                                                                      
  Summary: This is a WindowServer watchdog timeout (hung for 40+ seconds). Thread 6819038 in WindowServer was running while many other WindowServer   
  threads were blocked on it. The crash log doesn't show MacThrottle directly, but given the timing (when quitting), the issue is likely related to   
  how MacThrottle interacts with system services during shutdown.                                                                                     
                                                                                                                                                      
  Most likely cause: The HIDTemperatureReader uses private HID APIs (IOHIDEventSystemClientCreate, etc.) that interact with WindowServer. These are   
  being called every 2 seconds via the polling timer. During app termination, if a HID call is in progress or starts at an inopportune time, it could 
  potentially cause WindowServer to hang.                                                                                                             
                                                                                                                                                      
  Key observations:                                                                                                                                   
  1. HIDTemperatureReader creates/destroys an IOHIDEventSystemClient on every read (every 2 seconds)                                                  
  2. The recent commit d38efde already fixed a HID resource leak, suggesting HID handling has been problematic                                        
  3. There's no explicit cleanup before quit - it relies on deinit                                                                                    
  4. The timer callback uses [weak self] but the HID reader is a static singleton                                                                     
                                                                                                                                                      
  Recommendations to investigate/fix:                                                                                                                 
                                                                                                                                                      
  1. Add explicit shutdown handling - Stop the timer and avoid HID calls during quit:                                                                 
                                                                                                                                                      
  // In ThermalMonitor                                                                                                                                
  func stopMonitoring() {                                                                                                                             
      timer?.invalidate()                                                                                                                             
      timer = nil                                                                                                                                     
  }                                                                                                                                                   
                                                                                                                                                      
  Then call this before the app terminates.                                                                                                           
                                                                                                                                                      
  2. Make HID client persistent instead of creating/destroying on each read - this reduces interactions with th

[angristan]

Are you using the latest version? Sounds like #9 👀