Program: 2107
Project: 2107
Buggy source:
private final void completePauseLocked(){
  ActivityRecord prev=mPausingActivity;
  if (DEBUG_PAUSE)   Slog.v(TAG,"String_Node_Str" + prev);
  if (prev != null) {
    if (prev.finishing) {
      if (DEBUG_PAUSE)       Slog.v(TAG,"String_Node_Str" + prev);
      prev=finishCurrentActivityLocked(prev,FINISH_AFTER_VISIBLE,false);
    }
 else     if (prev.app != null) {
      if (DEBUG_PAUSE)       Slog.v(TAG,"String_Node_Str" + prev);
      if (prev.waitingVisible) {
        prev.waitingVisible=false;
        mStackSupervisor.mWaitingVisibleActivities.remove(prev);
        if (DEBUG_SWITCH || DEBUG_PAUSE)         Slog.v(TAG,"String_Node_Str" + prev);
      }
      if (prev.configDestroy) {
        if (DEBUG_PAUSE)         Slog.v(TAG,"String_Node_Str" + prev);
        destroyActivityLocked(prev,true,false,"String_Node_Str");
      }
 else {
        mStackSupervisor.mStoppingActivities.add(prev);
        if (mStackSupervisor.mStoppingActivities.size() > 3 || prev.frontOfTask && mTaskHistory.size() <= 1) {
          if (DEBUG_PAUSE)           Slog.v(TAG,"String_Node_Str");
          mStackSupervisor.scheduleIdleLocked();
        }
 else {
          checkReadyForSleepLocked();
        }
      }
    }
 else {
      if (DEBUG_PAUSE)       Slog.v(TAG,"String_Node_Str" + prev);
      prev=null;
    }
    mPausingActivity=null;
  }
  final ActivityStack topStack=mStackSupervisor.getFocusedStack();
  if (!mService.isSleepingOrShuttingDown()) {
    topStack.resumeTopActivityLocked(prev);
  }
 else {
    checkReadyForSleepLocked();
    ActivityRecord top=topStack.topRunningActivityLocked(null);
    if (top == null || (prev != null && top != prev)) {
      topStack.resumeTopActivityLocked(null);
    }
  }
  if (prev != null) {
    prev.resumeKeyDispatchingLocked();
  }
  if (prev.app != null && prev.cpuTimeAtResume > 0 && mService.mBatteryStatsService.isOnBattery()) {
    long diff=0;
synchronized (mService.mProcessStatsThread) {
      diff=mService.mProcessStats.getCpuTimeForPid(prev.app.pid) - prev.cpuTimeAtResume;
    }
    if (diff > 0) {
      BatteryStatsImpl bsi=mService.mBatteryStatsService.getActiveStatistics();
synchronized (bsi) {
        BatteryStatsImpl.Uid.Proc ps=bsi.getProcessStatsLocked(prev.info.applicationInfo.uid,prev.info.packageName);
        if (ps != null) {
          ps.addForegroundTimeLocked(diff);
        }
      }
    }
  }
  prev.cpuTimeAtResume=0;
}

Fixed version (ground truth):
private final void completePauseLocked(){
  ActivityRecord prev=mPausingActivity;
  if (DEBUG_PAUSE)   Slog.v(TAG,"String_Node_Str" + prev);
  if (prev != null) {
    if (prev.finishing) {
      if (DEBUG_PAUSE)       Slog.v(TAG,"String_Node_Str" + prev);
      prev=finishCurrentActivityLocked(prev,FINISH_AFTER_VISIBLE,false);
    }
 else     if (prev.app != null) {
      if (DEBUG_PAUSE)       Slog.v(TAG,"String_Node_Str" + prev);
      if (prev.waitingVisible) {
        prev.waitingVisible=false;
        mStackSupervisor.mWaitingVisibleActivities.remove(prev);
        if (DEBUG_SWITCH || DEBUG_PAUSE)         Slog.v(TAG,"String_Node_Str" + prev);
      }
      if (prev.configDestroy) {
        if (DEBUG_PAUSE)         Slog.v(TAG,"String_Node_Str" + prev);
        destroyActivityLocked(prev,true,false,"String_Node_Str");
      }
 else {
        mStackSupervisor.mStoppingActivities.add(prev);
        if (mStackSupervisor.mStoppingActivities.size() > 3 || prev.frontOfTask && mTaskHistory.size() <= 1) {
          if (DEBUG_PAUSE)           Slog.v(TAG,"String_Node_Str");
          mStackSupervisor.scheduleIdleLocked();
        }
 else {
          checkReadyForSleepLocked();
        }
      }
    }
 else {
      if (DEBUG_PAUSE)       Slog.v(TAG,"String_Node_Str" + prev);
      prev=null;
    }
    mPausingActivity=null;
  }
  final ActivityStack topStack=mStackSupervisor.getFocusedStack();
  if (!mService.isSleepingOrShuttingDown()) {
    mStackSupervisor.resumeTopActivitiesLocked(topStack,prev,null);
  }
 else {
    checkReadyForSleepLocked();
    ActivityRecord top=topStack.topRunningActivityLocked(null);
    if (top == null || (prev != null && top != prev)) {
      mStackSupervisor.resumeTopActivitiesLocked(topStack,null,null);
    }
  }
  if (prev != null) {
    prev.resumeKeyDispatchingLocked();
  }
  if (prev.app != null && prev.cpuTimeAtResume > 0 && mService.mBatteryStatsService.isOnBattery()) {
    long diff=0;
synchronized (mService.mProcessStatsThread) {
      diff=mService.mProcessStats.getCpuTimeForPid(prev.app.pid) - prev.cpuTimeAtResume;
    }
    if (diff > 0) {
      BatteryStatsImpl bsi=mService.mBatteryStatsService.getActiveStatistics();
synchronized (bsi) {
        BatteryStatsImpl.Uid.Proc ps=bsi.getProcessStatsLocked(prev.info.applicationInfo.uid,prev.info.packageName);
        if (ps != null) {
          ps.addForegroundTimeLocked(diff);
        }
      }
    }
  }
  prev.cpuTimeAtResume=0;
}