[ 
https://issues.apache.org/jira/browse/NETBEANS-234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16307254#comment-16307254
 ] 

Geertjan Wielenga commented on NETBEANS-234:
--------------------------------------------

Without a project that you are able to see this problem with, this problem 
cannot be reproduced and solved.

> Exception when opening project
> ------------------------------
>
>                 Key: NETBEANS-234
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-234
>             Project: NetBeans
>          Issue Type: Bug
>          Components: java - Project
>            Reporter: Thomas Kellerer
>
> When opening a project (that was created with NetBeans 8.2) I get the 
> following exception:
> {noformat}
> java.lang.AssertionError: typeSig ERROR
>       at 
> jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:4856)
>       at 
> jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:291)
>       at 
> jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:4916)
>       at 
> jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleClassSig(Types.java:4892)
>       at 
> jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:4805)
>       at 
> jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:291)
>       at 
> jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.typeSig(ClassWriter.java:334)
>       at 
> jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeMemberAttrs(ClassWriter.java:589)
>       at 
> jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeField(ClassWriter.java:1138)
>       at 
> jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeFields(ClassWriter.java:1641)
>       at 
> jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeClassFile(ClassWriter.java:1759)
>       at 
> jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeClass(ClassWriter.java:1679)
>       at 
> jdk.compiler/com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:743)
>       at 
> jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1621)
>       at 
> jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl$2.process(JavacTaskImpl.java:451)
>       at 
> jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:499)
>       at 
> jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:454)
>       at 
> org.netbeans.modules.java.source.indexing.VanillaCompileWorker$2.run(VanillaCompileWorker.java:302)
>       at 
> org.netbeans.modules.java.source.parsing.FileManagerTransaction.runConcurrent(FileManagerTransaction.java:180)
> [catch] at 
> org.netbeans.modules.java.source.indexing.VanillaCompileWorker.compile(VanillaCompileWorker.java:293)
>       at 
> org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:273)
>       at 
> org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:138)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:275)
>       at 
> org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:136)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2750)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$800(RepositoryUpdater.java:2154)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2636)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2634)
>       at 
> org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:540)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2634)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:3300)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:3255)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$4.run(RepositoryUpdater.java:2127)
>       at org.openide.util.lookup.Lookups.executeWith(Lookups.java:279)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2123)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2104)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.access$1500(RepositoryUpdater.java:136)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:3255)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3785)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3420)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:6183)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4300(RepositoryUpdater.java:5834)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:6099)
>       at org.openide.util.lookup.Lookups.executeWith(Lookups.java:279)
>       at 
> org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:83)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:6095)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:6091)
>       at 
> org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:153)
>       at 
> org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:335)
>       at 
> org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:118)
>       at 
> org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:67)
>       at 
> org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:6091)
>       at 
> java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
>       at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
>       at 
> org.openide.util.RequestProcessor$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)
> {noformat}
> The exception pops up "constantly" when working with the IDE
> Version and environment:
> {noformat}
> Product Version: Apache NetBeans IDE Dev (Build 
> incubator-netbeans-release-151-on-20171231)
> Java: 9.0.1; Java HotSpot(TM) 64-Bit Server VM 9.0.1+11
> Runtime: Java(TM) SE Runtime Environment 9.0.1+11
> System: Windows 10 version 10.0 running on amd64; Cp1252; en (nb)
> {noformat}



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