java.lang.AssertionError: assertion failed: PgnParser.this.type.class Parser does no longer exist, phase = namer
        at scala.Predef$.assert(Predef.java:117)
        at scala.tools.nsc.symtab.Types$adaptToNewRunMap$.adaptToNewRun(Types.java:3495)
        at scala.tools.nsc.symtab.Types$adaptToNewRunMap$.apply(Types.java:3535)
        at scala.tools.nsc.symtab.Types$adaptToNewRunMap$.apply(Types.java:3548)
        at scala.tools.nsc.symtab.Symbols$Symbol.adaptToNewRun$1(Symbols.java:846)
        at scala.tools.nsc.symtab.Symbols$Symbol.adaptInfos(Symbols.java:850)
        at scala.tools.nsc.symtab.Symbols$Symbol.rawInfo(Symbols.java:808)
        at scala.tools.nsc.symtab.Symbols$Symbol.info(Symbols.java:765)
        at scala.tools.nsc.symtab.Symbols$Symbol.tpe(Symbols.java:734)
        at org.netbeans.modules.scala.core.ast.ScalaUtils$ScalaUtil$.tryTpe(ScalaUtils.java:188)
        at org.netbeans.modules.scala.core.ast.ScalaUtils$ScalaUtil$.htmlTypeName(ScalaUtils.java:193)
        at org.netbeans.modules.scala.core.ast.ScalaUtils$ScalaUtil$.htmlFormat(ScalaUtils.java:178)
        at org.netbeans.modules.scala.core.ast.ScalaDfns$ScalaDfn.htmlFormat(ScalaDfns.java:104)
        at org.netbeans.modules.scala.editor.ScalaStructureAnalyzer$ScalaStructureItem.getHtml(ScalaStructureAnalyzer.java:221)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:285)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:278)
        at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:278)
        at org.netbeans.modules.csl.navigation.ClassMemberPanelUI$3.run(ClassMemberPanelUI.java:210)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:125)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)