Description Moritz Eysholdt 2010-05-20 11:02:45 EDT

as reported in: http://www.eclipse.org/forums/index.php?t=msg&th=168500&start=0&

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Import hidden(WS):
    ('import' | 'imp') importedNamespace=ImportedFQN (comment=Comment)?;

Comment:
  (comments+=SL_COMMENT)+
   ;
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leads to 
java.lang.NullPointerException
    at  org.eclipse.xtext.GrammarUtil.isOneOrMoreCardinality(Grammar Util.java:295)
    at  org.eclipse.xtext.GrammarUtil.isMultipleCardinality(GrammarU til.java:291)
    at  org.eclipse.xtext.validation.impl.ConcreteSyntaxConstraintPr ovider.createElement(ConcreteSyntaxConstraintProvider.java:3 34)
    at  org.eclipse.xtext.validation.impl.ConcreteSyntaxConstraintPr ovider.createElement(ConcreteSyntaxConstraintProvider.java:3 19)
    at  org.eclipse.xtext.validation.impl.ConcreteSyntaxConstraintPr ovider.createElement(ConcreteSyntaxConstraintProvider.java:3 53)
    at  org.eclipse.xtext.validation.impl.ConcreteSyntaxConstraintPr ovider.getConstraint(ConcreteSyntaxConstraintProvider.java:4 46)
    at  org.eclipse.xtext.validation.impl.ConcreteSyntaxConstraintPr ovider.getConstraints(ConcreteSyntaxConstraintProvider.java: 461)
    at  org.eclipse.xtext.validation.impl.ConcreteSyntaxValidator.va lidateObject(ConcreteSyntaxValidator.java:104)
    at  org.eclipse.xtext.validation.impl.ConcreteSyntaxValidator.va lidateRecursive(ConcreteSyntaxValidator.java:150)
    at  org.eclipse.xtext.parsetree.reconstr.Serializer.serialize(Se rializer.java:48)