Shevek created NETBEANS-2328:
--------------------------------

             Summary: Assertion on completion
                 Key: NETBEANS-2328
                 URL: https://issues.apache.org/jira/browse/NETBEANS-2328
             Project: NetBeans
          Issue Type: Bug
    Affects Versions: 10.0
         Environment: OpenJDK Runtime Environment (build 
1.8.0_191-8u191-b12-2ubuntu0.18.10.1-b12)

            Reporter: Shevek


Type something, press control-space. The thing I typed vanishes, and I get this 
exception. Tends to happen after the IDE has been running an hour or so, and 
has generally slowed down, so could be a race?

java.lang.AssertionError
        at com.sun.tools.javac.util.Assert.error(Assert.java:155)
        at com.sun.tools.javac.util.Assert.check(Assert.java:46)
        at com.sun.tools.javac.code.Scope$ScopeImpl.dble(Scope.java:410)
        at com.sun.tools.javac.code.Scope$ScopeImpl.enter(Scope.java:433)
        at 
com.sun.tools.javac.comp.MemberEnter.visitVarDef(MemberEnter.java:479)
        at 
com.sun.tools.javadoc.main.JavadocMemberEnter.visitVarDef(JavadocMemberEnter.java:84)
        at 
org.netbeans.lib.nbjavac.services.NBJavadocMemberEnter.visitVarDef(NBJavadocMemberEnter.java:92)
        at 
com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:962)
        at 
com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:172)
        at com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:1184)
        at 
com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:962)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:673)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:749)
        at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:773)
        at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1350)
        at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:73)
        at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1026)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:673)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:749)
        at 
org.netbeans.api.java.source.TreeUtilities.attributeTree(TreeUtilities.java:880)
        at 
org.netbeans.api.java.source.TreeUtilities.attributeTree(TreeUtilities.java:810)
        at 
org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.type(JavaCodeTemplateProcessor.java:716)
        at 
org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.getProposedValue(JavaCodeTemplateProcessor.java:431)
        at 
org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.updateDefaultValues(JavaCodeTemplateProcessor.java:143)
        at 
org.netbeans.lib.editor.codetemplates.CodeTemplateInsertHandler.processTemplate(CodeTemplateInsertHandler.java:225)
        at 
org.netbeans.lib.editor.codetemplates.CodeTemplateManagerOperation.insert(CodeTemplateManagerOperation.java:273)
        at 
org.netbeans.lib.editor.codetemplates.api.CodeTemplate.insert(CodeTemplate.java:82)
        at 
org.netbeans.modules.editor.java.JavaCompletionItem.process(JavaCompletionItem.java:566)
        at 
org.netbeans.modules.editor.java.JavaCompletionItem.defaultAction(JavaCompletionItem.java:286)
        at 
org.netbeans.modules.editor.completion.CompletionImpl.dispatchKeyEvent(CompletionImpl.java:785)
        at 
org.netbeans.modules.editor.completion.CompletionImpl.keyPressed(CompletionImpl.java:386)
        at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:250)
        at java.awt.Component.processKeyEvent(Component.java:6497)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2832)
        at java.awt.Component.processEvent(Component.java:6316)
        at java.awt.Container.processEvent(Container.java:2239)
        at java.awt.Component.dispatchEventImpl(Component.java:4889)
        at java.awt.Container.dispatchEventImpl(Container.java:2297)
        at java.awt.Component.dispatchEvent(Component.java:4711)
        at 
java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
        at 
java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:835)
        at 
java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1103)
        at 
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:974)
        at 
java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:800)
        at java.awt.Component.dispatchEventImpl(Component.java:4760)
        at java.awt.Container.dispatchEventImpl(Container.java:2297)
        at java.awt.Window.dispatchEventImpl(Window.java:2746)
        at java.awt.Component.dispatchEvent(Component.java:4711)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
        at java.awt.EventQueue.access$500(EventQueue.java:97)
        at java.awt.EventQueue$3.run(EventQueue.java:709)
        at java.awt.EventQueue$3.run(EventQueue.java:703)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
        at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
        at java.awt.EventQueue$4.run(EventQueue.java:733)
        at java.awt.EventQueue$4.run(EventQueue.java:731)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
        at 
org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
[catch] at 
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
        at 
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)




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