fix: restore default cmd+tab shortcut when alt-tab crashes

src/main.swift

@@ -1,11 +1,22 @@
 import AppKit
 import Darwin
 
-// if the app is quit/force-quit from Activity Monitor, it will receive SIGTERM and applicationWillTerminate won't be called
-// we intercept SIGTERM so we can reset the native command-tab shortcut
-signal(SIGTERM) { _ in
-    // symbolic hotkeys state persist after the app is quit; we restore this shortcut before quitting
+// - if the app is quit/force-quit from Activity Monitor, it will receive SIGTERM and applicationWillTerminate won't be called
+// - if the app crashes in swift code (e.g. unexpected nil object), SIGTRAP is sent
+// we intercept these signals, and reset the native command-tab shortcut
+[SIGTERM, SIGTRAP].forEach {
+    signal($0) { s in
+        setNativeCommandTabEnabled(true)
+        debugPrint("Exiting after receiving signal", s)
+        exit(0)
+    }
+}
+
+// - if the app crashes in objective-c code, an NSException may be sent
+// we intercept the exception, and reset the native command-tab shortcut
+NSSetUncaughtExceptionHandler { (exception) in
     setNativeCommandTabEnabled(true)
+    debugPrint("Exiting after receiving uncaught NSException", exception)
     exit(0)
 }