Application crash when ending mesh voice call

[quixotique]

Observed at LCA 2013, January 2013, under conditions of high Wi-Fi network congestion.

Batphone A (Galaxy S2 Serval-0.90-pre-9-g3d0f36d) places a mesh call to Batphone B (HTC Sensation (Galaxy S2 Serval-0.90-pre-9-g3d0f36d) via a directory server. Call takes several seconds to reach B, is answered. A displays "In Call" after a few seconds. A then hangs up call. After a few seconds "Application crash" is reported on B.

D/WifiService(  263): [smart wifi] ACTION_BATTERY_CHANGED pluggedType: 2
V/DeviceStorageMonitorService(  263): freeMemory=844365824
D/DeviceStorageMonitorService(  263): OoO SMS Memory available. SMS_AVAILABLE_THRESHOLD == 524288
I/DeviceStorageMonitorService(  263): Posting Message again
V/DeviceStorageMonitorService(  263): freeMemory=844365824
D/DeviceStorageMonitorService(  263): OoO SMS Memory available. SMS_AVAILABLE_THRESHOLD == 524288
I/DeviceStorageMonitorService(  263): Posting Message again
D/WifiService(  263): failed to set SSID: mesh.servalproject.org
D/WifiService(  263): Failed to set a network variable, removed network: 8
V/NotificationService(  263): Charging...
I/ActivityManager(  263): Starting activity: Intent { cmp=org.servalproject/.ui.ContactsActivity } from pid 12845
I/ActivityManager(  263): Starting activity: Intent { cmp=org.servalproject/.PeerList } from pid 12845
D/WifiService(  263): [smart wifi] ACTION_BATTERY_CHANGED pluggedType: 2
I/ActivityManager(  263): Starting activity: Intent { flg=0x34000000 cmp=org.servalproject/.batphone.UnsecuredCall } from pid 12845
V/DeviceStorageMonitorService(  263): freeMemory=844361728
D/DeviceStorageMonitorService(  263): OoO SMS Memory available. SMS_AVAILABLE_THRESHOLD == 524288
I/DeviceStorageMonitorService(  263): Posting Message again
V/NotificationService(  263): Charging...
V/NotificationService(  263): Charging...
D/InputManagerService(  263): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@40a367f0
V/NotificationService(  263): Charging...
D/NotificationService(  263): cancelNotification, ACTION_NOTIFICATION_REMOVE,pkg=org.servalproject,id=-1
D/ConnectivityService(  263): [embedded] ConnectivityChange for WIFI: DISCONNECTED/SCANNING, default=1
I/TelephonyRegistry(  263): notifyDataConnection: state=0 isDataConnectivityPossible=true reason=apnSwitched interfaceName=null networkType=3
D/TelephonyRegistry(  263): notifyDataConnection() state=0isDataConnectivityPossible()true, reason=apnSwitched
D/TelephonyRegistry(  263): broadcastDataConnectionStateChanged()  state=DISCONNECTEDtypes=null, interfaceName=null
D/LocationManagerService(  263): ConnectivityChange for WIFI:SCANNING
I/TelephonyRegistry(  263): notifyDataConnection: state=1 isDataConnectivityPossible=true reason=apnSwitched interfaceName=null networkType=3
D/TelephonyRegistry(  263): notifyDataConnection() state=1isDataConnectivityPossible()true, reason=apnSwitched
D/TelephonyRegistry(  263): broadcastDataConnectionStateChanged()  state=CONNECTINGtypes=default,hipri,supl, interfaceName=null
D/WifiService(  263): [smart wifi] ACTION_BATTERY_CHANGED pluggedType: 2
D/WifiService(  263): acquireWifiLockLocked: WifiLock{NetworkLocationProvider type=2 binder=android.os.BinderProxy@40cff870} Mode: 2
D/WifiService(  263): enable and start wifi due to updateWifiState
D/WifiService(  263): releaseWifiLockLocked: WifiLock{NetworkLocationProvider type=2 binder=android.os.BinderProxy@40cff870} Mode: 2
E/AndroidRuntime(12845): FATAL EXCEPTION: Timer-0
E/AndroidRuntime(12845): java.lang.NullPointerException
E/AndroidRuntime(12845):        at org.servalproject.batphone.CallHandler.hangup(CallHandler.java:163)
E/AndroidRuntime(12845):        at org.servalproject.batphone.CallHandler$1.run(CallHandler.java:143)
E/AndroidRuntime(12845):        at java.util.Timer$TimerImpl.run(Timer.java:284)
W/ActivityManager(  263):   Force finishing activity org.servalproject/.batphone.UnsecuredCall