Fix “timer circular reference” leaks.

// FREEBIE

Signal/src/Jobs/MessageFetcherJob.swift

@@ -62,7 +62,9 @@ class MessageFetcherJob: NSObject {
     // Do not use in production.
     func startRunLoop(timeInterval: Double) {
         Logger.error("\(TAG) Starting message fetch polling. This should not be used in production.")
-        timer = Timer.scheduledTimer(timeInterval: timeInterval, target: self, selector: #selector(runAsync), userInfo: nil, repeats: true)
+        timer = WeakTimer.scheduledTimer(timeInterval: timeInterval, target: self, userInfo: nil, repeats: true) {[weak self] _ in
+            self?.runAsync()
+        }
     }
 
     func stopRunLoop() {

Signal/src/Signal-Bridging-Header.h

@@ -42,6 +42,7 @@
 #import <SignalServiceKit/MIMETypeUtil.h>
 #import <SignalServiceKit/NSData+Base64.h>
 #import <SignalServiceKit/NSDate+millisecondTimeStamp.h>
+#import <SignalServiceKit/NSTimer+OWS.h>
 #import <SignalServiceKit/OWSAcknowledgeMessageDeliveryRequest.h>
 #import <SignalServiceKit/OWSAttachmentsProcessor.h>
 #import <SignalServiceKit/OWSCallAnswerMessage.h>

Signal/src/ViewControllers/CallViewController.swift

@@ -698,11 +698,12 @@ class CallViewController: UIViewController, CallObserver, CallServiceObserver, R
         if callState == .connected {
             if callDurationTimer == nil {
                 let kDurationUpdateFrequencySeconds = 1 / 20.0
-                callDurationTimer = Timer.scheduledTimer(timeInterval: TimeInterval(kDurationUpdateFrequencySeconds),
+                callDurationTimer = WeakTimer.scheduledTimer(timeInterval: TimeInterval(kDurationUpdateFrequencySeconds),
                                                          target:self,
-                                                         selector:#selector(updateCallDuration),
                                                          userInfo:nil,
-                                                         repeats:true)
+                                                         repeats:true) {[weak self] _ in
+                                                            self?.updateCallDuration()
+                }
             }
         } else {
             callDurationTimer?.invalidate()
@@ -710,7 +711,7 @@ class CallViewController: UIViewController, CallObserver, CallServiceObserver, R
         }
     }
 
-    func updateCallDuration(timer: Timer?) {
+    func updateCallDuration() {
         updateCallStatusLabel(callState: call.state)
     }