[NETBEANS-5705] Java editor uses obsolete lexer token sequence

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 12.3
• Component/s: java - Editor

Environment

Product Version: Apache NetBeans IDE 12.3

Java: 1.8.0_272; OpenJDK 64-Bit Server VM 25.272-b10

Runtime: OpenJDK Runtime Environment 1.8.0_272-b10

System: Linux version 5.8.18-100.fc31.x86_64 running on amd64; UTF-8; en_GB (nb)

User directory: /home/redacted/snap/netbeans/common/data/12.3

Cache directory: /home/redacted/snap/netbeans/common/cache/12.3

• Assignee: Unassigned
• Reporter: Gregory Williams
• Created: 21/May/21 17:12
• Updated: 21/May/21 17:12

Description

This has happened a few times whilst editing some Java 8 code, but I've not managed to pin down exactly which step/syntax it is that's causing it:

java.util.ConcurrentModificationException: Caller uses obsolete token sequence which is no longer valid. Underlying token hierarchy has been modified by insertion or removal or a custom language embedding was created.TS.modCount=600, tokenList.modCount()=613, rootModCount=613
Please report a bug against a module that calls lexer's code e.g. java, php etc. but not the lexer module itself.
	at org.netbeans.api.lexer.TokenSequence.checkValid(TokenSequence.java:784)
	at org.netbeans.api.lexer.TokenSequence.moveIndex(TokenSequence.java:568)
	at org.netbeans.modules.java.editor.base.semantic.TokenList.resetToIndex(TokenList.java:372)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitExpressionStatement(SemanticHighlighterBase.java:762)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitExpressionStatement(SemanticHighlighterBase.java:280)
	at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1555)
	at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82)
	at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1022)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:280)
	at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:90)
	at com.sun.source.util.TreeScanner.scan(TreeScanner.java:105)
	at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:78)
	at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:250)
	at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1074)
	at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82)
	at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1022)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitMethod(SemanticHighlighterBase.java:836)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitMethod(SemanticHighlighterBase.java:280)
	at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:940)
	at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82)
	at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1022)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:280)
	at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:90)
	at com.sun.source.util.TreeScanner.scan(TreeScanner.java:105)
	at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:78)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitClass(SemanticHighlighterBase.java:944)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitClass(SemanticHighlighterBase.java:280)
	at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:846)
	at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82)
	at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1022)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:280)
	at com.sun.source.util.TreeScanner.scan(TreeScanner.java:105)
	at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:78)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitCompilationUnit(SemanticHighlighterBase.java:561)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitCompilationUnit(SemanticHighlighterBase.java:280)
	at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:605)
	at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82)
	at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1022)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase.process(SemanticHighlighterBase.java:156)
	at org.netbeans.modules.java.editor.semantic.SemanticHighlighter.process(SemanticHighlighter.java:56)
	at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase.run(SemanticHighlighterBase.java:112)
	at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561)
[catch] at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:786)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:279)
	at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:702)
	at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:663)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)