Swift exit().

Signal/src/AppDelegate.m

@@ -240,8 +240,7 @@ static NSTimeInterval launchStartedAt;
         [[UIApplication sharedApplication] scheduleLocalNotification:notification];
         [UIApplication.sharedApplication setApplicationIconBadgeNumber:1];
 
-        [DDLog flushLog];
-        exit(0);
+        OWSFail(@"!isDatabasePasswordAccessible.");
     }
 }
 
@@ -339,9 +338,7 @@ static NSTimeInterval launchStartedAt;
                                                    style:UIAlertActionStyleDefault
                                                  handler:^(UIAlertAction *_Nonnull action) {
                                                      [Pastelog submitLogsWithCompletion:^{
-                                                         OWSLogInfo(@"exiting after sharing debug logs.");
-                                                         [DDLog flushLog];
-                                                         exit(0);
+                                                         OWSFail(@"exiting after sharing debug logs.");
                                                      }];
                                                  }]];
     UIViewController *fromViewController = [[UIApplication sharedApplication] frontmostViewController];

Signal/src/environment/SignalApp.m

@@ -233,7 +233,7 @@ NS_ASSUME_NONNULL_BEGIN
     [self clearAllNotifications];
 
     [DebugLogger.sharedLogger wipeLogs];
-    exit(0);
+    OWSFail(@"App data reset.");
 }
 
 + (void)clearAllNotifications

SignalMessaging/environment/VersionMigrations.m

@@ -69,8 +69,7 @@ NS_ASSUME_NONNULL_BEGIN
         UIAlertAction *quitAction = [UIAlertAction actionWithTitle:@"Quit"
                                                              style:UIAlertActionStyleDefault
                                                            handler:^(UIAlertAction *_Nonnull action) {
-                                                               [DDLog flushLog];
-                                                               exit(0);
+                                                               OWSFail(@"Obsolete install.");
                                                            }];
         [alertController addAction:quitAction];