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Examples of errors detected by the V314…

Examples of errors detected by the V3145 diagnostic

V3145. Unsafe dereference of a WeakReference target. The object could have been garbage collected before the 'Target' property was accessed.


Telerik UI for UWP

V3145 Unsafe dereference of a WeakReference target, consider inspecting info.Target. The object could have been garbage collected between checking 'IsAlive' and accessing the 'Target' property. FadeAnimation.cs 84


public class RadFadeAnimation : RadAnimation
{
....
  protected internal override void
    ApplyAnimationValues(PlayAnimationInfo info)
  {
  ....
    if (info.Target.Opacity != opacity)
    {
      info.Target.Opacity = opacity;
    }
  ....
  }
....
}

public class PlayAnimationInfo
{
  ....
  private WeakReference target;
  ....

  public PlayAnimationInfo(Storyboard storyboard,
                           RadAnimation animation,
                           UIElement target)
  {
    ....
    this.target = new WeakReference(target);
    ....
  }
  ....
  public UIElement Target
  {
    get
    {
      if (this.target.IsAlive)
      {
        return this.target.Target as UIElement;
      }
      return null;
    }
  }
  ....
}

Similar errors can be found in some other places:

  • V3145 Unsafe dereference of a WeakReference target, consider inspecting target. The object could have been garbage collected before the 'Target' property was accessed. MoveXAnimation.cs 80
  • V3145 Unsafe dereference of a WeakReference target, consider inspecting target. The object could have been garbage collected before the 'Target' property was accessed. MoveYAnimation.cs 80
  • V3145 Unsafe dereference of a WeakReference target, consider inspecting info.Target. The object could have been garbage collected before the 'Target' property was accessed. PlaneProjectionAnimation.cs 244
  • And 1 additional diagnostic messages.

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