title: NSLayoutconstraint breakage since xcode 6.3
body: <p>I am trying to set the below constraint to one of my floating view.</p>
  
  <pre><code>    leftConstraint = [NSLayoutConstraint constraintWithItem:detailView 
  attribute:NSLayoutAttributeLeft
  relatedBy:NSLayoutRelationEqual toItem:nil
  attribute:NSLayoutAttributeNotAnAttribute
  multiplier:0.0 
  constant:VIEW_WIDTH];
  </code></pre>
  
  <p>The view will be moved horizontally and has a fixed width. I couldn't pin this view to any other view. I will be changing the constant value in the  constraint to move it over my view.</p>
  
  <p>When I run the above the constraint in XCode 6.3, am getting the below error. 
  "A multiplier of 0 or a nil second item together with a location for the first attribute creates an illegal constraint of a location equal to a constant"</p>
  
  <p>I am not sure why this creates an illegal constraint.</p>
  
  <p>To bypass this issue, I am using the 0.001 multiplier, but thats not going to work in all cases. So looking for an better workaround to this requirement.</p>