NPE when loading new version UML model from tree editor

Load some queries for UML into the Query Explorer
Create a new, empty model with the current version of Papyrus and add the primitive types template during the wizard.
Close the graphical editor
Open the .uml file in the tree editor, it should not load any other models.
Without opening the model in the tree editor, load it into the Query Explorer.
The model entry is marked with error and an exception is thrown and visible in the Error log

This was reported as part of #337, related to dynamic EMF support #199

EMF-IncQuery encountered an error in processing the EMF model. This happened while trying to add the object: org.eclipse.emf.ecore.impl.DynamicEObjectImpl@622605d (eClass: org.eclipse.emf.ecore.impl.EClassImpl@4bb3a234 (name: EClass) (instanceClassName: null) (abstract: false, interface: false))
java.lang.NullPointerException
    at org.eclipse.emf.ecore.impl.EStructuralFeatureImpl.getSettingDelegate(EStructuralFeatureImpl.java:830)
    at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eSettingDelegate(BasicEObjectImpl.java:1561)
    at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1027)
    at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1011)
    at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1003)
    at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:998)
    at org.eclipse.viatra2.emf.incquery.base.comprehension.EMFModelComprehension.traverseObject(EMFModelComprehension.java:139)
    at org.eclipse.viatra2.emf.incquery.base.core.NavigationHelperContentAdapter$1.call(NavigationHelperContentAdapter.java:194)
    at org.eclipse.viatra2.emf.incquery.base.core.NavigationHelperContentAdapter$1.call(NavigationHelperContentAdapter.java:1)
    at org.eclipse.viatra2.emf.incquery.base.core.NavigationHelperImpl.coalesceTraversals(NavigationHelperImpl.java:627)
    at org.eclipse.viatra2.emf.incquery.base.core.NavigationHelperContentAdapter.addAdapter(NavigationHelperContentAdapter.java:190)

Example model:

<?xml version="1.0" encoding="UTF-8"?>
<uml:Model xmi:version="20110701" xmlns:xmi="http://www.omg.org/spec/XMI/20110701" xmlns:uml="http://www.eclipse.org/uml2/4.0.0/UML" xmi:id="_50hQwCHwEeK6ifTnZqqNGQ" name="Model">
  <packageImport xmi:id="_50hQwSHwEeK6ifTnZqqNGQ">
    <importedPackage xmi:type="uml:Model" href="pathmap://UML_LIBRARIES/UMLPrimitiveTypes.library.uml#_0"/>
  </packageImport>
  <packagedElement xmi:type="uml:Class" xmi:id="_6g7q0CHwEeK6ifTnZqqNGQ" name="Class1"/>
</uml:Model>

viatra / EMF-IncQuery

NPE when loading new version UML model from tree editor #348