EClassifier type in parameter list doesn't work in some cases

bughunter.eiq

package bughunter

import "http://www.eclipse.org/viatra2/patternlanguage/core/PatternLanguage"
import "http://www.eclipse.org/viatra2/patternlanguage/EMFPatternLanguage"
import "http://www.eclipse.org/emf/2002/Ecore"

@QueryExplorer(display = true) pattern ClassConstrainInDirectBodyByEntities(pat:Pattern, body:PatternBody, variable:Variable, class:EClassifier, constraint:EClassifierConstraint) =
{
	Pattern.bodies(pat,body);
	PatternBody.constraints(body,constraint);
	
	EClassifierConstraint.^var.variable(constraint,variable);
	
	EClassifierConstraint.type(constraint,type);
	ClassType.classname(type,class);
}

@QueryExplorer(display = true) pattern ClassConstrainInDirectBodyByEntities2(pat:Pattern, body:PatternBody, variable:Variable, class:EClassifier, constraint:EClassifierConstraint) =
{
	find ClassConstrainInDirectBodyByEntities(pat,body,variable,class,constraint);
}

@QueryExplorer(display = true) pattern ClassConstrainInDirectBodyByEntities3(pat:Pattern, body:PatternBody, variable:Variable, class/*:EClassifier*/, constraint:EClassifierConstraint) =
{
	find ClassConstrainInDirectBodyByEntities(pat,body,variable,class,constraint);
}

@QueryExplorer(display = true) pattern ClassConstrainInDirectBodyByEntities4(pat:Pattern, body:PatternBody, variable:Variable, class:EObject/*:EClassifier*/, constraint:EClassifierConstraint) =
{
	find ClassConstrainInDirectBodyByEntities(pat,body,variable,class,constraint);
}

testpatterns.eiq

package testpatterns

import "http://school.ecore"

pattern schools(S) =
{
	School(S);
}