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Posted to notifications@netbeans.apache.org by GitBox <gi...@apache.org> on 2022/03/17 13:38:52 UTC

[GitHub] [netbeans] ChristianPervoelz opened a new issue #3803: Code template expansion with 'forc' causes NetBeans to hang

ChristianPervoelz opened a new issue #3803:
URL: https://github.com/apache/netbeans/issues/3803


   ### Apache NetBeans version
   
   Apache NetBeans 13
   
   ### What happened
   
   It was tried to write a simple loop using iterators on a collection.
   Typing _forc_ followed by the tab key should expand to 
   ```
   for (Iterator<E> iterator = c.iterator(); iterator.hasNext();) {
     E next = iterator.next();
        
   }
   ```
   but actually let NetBeans hang up.
   Even several minutes of waiting does not clean up the situation.
   
   ### How to reproduce
   
   1. Create a class with a single method like this: (the type of modifiers do not matter)
   ```
   public class MyClass<E> {
   
     public boolean aMethod(Collection<? extends E> c) {
        
     }
   }
   ```
   
   2. Type `forc` into the method block and press the tab key.
   
   NetBeans will hang now.
   
   **Note**
   This happens only if `? extends E` is used.
   The same method, but using `Collection<E>` as parameter only will cause no problems.
   
   ### Did this work correctly in an earlier version?
   
   Apache NetBeans 12.4
   
   ### Operating System
   
   Windows 11
   
   ### JDK
   
   OpenJDK 16
   
   ### Apache NetBeans packaging
   
   Apache NetBeans provided installer
   
   ### Anything else
   
   Issues is reproducible constantly.
   
   I don't know for sure in which version this problem occurred first or in which version it worked last, but I'm pretty sure it has been working properly in 12.4 at least.
   
   ### Are you willing to submit a pull request?
   
   No
   
   ### Code of Conduct
   
   Yes


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[GitHub] [netbeans] mbien commented on issue #3803: Code template expansion with 'forc' causes NetBeans to hang

Posted by GitBox <gi...@apache.org>.
mbien commented on issue #3803:
URL: https://github.com/apache/netbeans/issues/3803#issuecomment-1070954780


   @ChristianPervoelz thanks, I can reproduce it using your minimal sample.


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[GitHub] [netbeans] mbien commented on issue #3803: Code template expansion with 'forc' causes NetBeans to hang

Posted by GitBox <gi...@apache.org>.
mbien commented on issue #3803:
URL: https://github.com/apache/netbeans/issues/3803#issuecomment-1073166940


   this doesn't appear to be a locking/concurrency problem, it looks like a infinite loop locking up the EDT while it keeps running. 
   I am not sure if this should be on the EDT on the first place, but this wouldn't solve the issue anyway. @jlahoda @dbalek any thoughts?
   
   some thread dumps after it freezes from mouse click (on the iterator completion) and up:
   
   ```
    "AWT-EventQueue-0" - Thread t@30
       java.lang.Thread.State: RUNNABLE
       at java.base@17.0.2/java.lang.Throwable.fillInStackTrace(Native Method)
       at java.base@17.0.2/java.lang.Throwable.fillInStackTrace(Throwable.java:798)
       - locked <30a68cd8> (a com.sun.tools.javac.code.Symbol$CompletionFailure)
       at java.base@17.0.2/java.lang.Throwable.<init>(Throwable.java:256)
       at java.base@17.0.2/java.lang.Exception.<init>(Exception.java:55)
       at java.base@17.0.2/java.lang.RuntimeException.<init>(RuntimeException.java:52)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.Symbol$CompletionFailure.<init>(Symbol.java:2552)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.ClassFinder.newCompletionFailure(ClassFinder.java:408)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.ClassFinder.classFileNotFound(ClassFinder.java:395)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.ClassFinder.fillIn(ClassFinder.java:390)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.ClassFinder.complete(ClassFinder.java:291)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.ClassFinder$$Lambda$479/0x00000008015c30c8.complete(Unknown Source)
       at org.netbeans.lib.nbjavac.services.NBClassFinder.lambda$getCompleter$1(NBClassFinder.java:95)
       at org.netbeans.lib.nbjavac.services.NBClassFinder$$Lambda$483/0x00000008015a1630.complete(Unknown Source)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.Symbol.complete(Symbol.java:682)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1410)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.code.ClassFinder.loadClass(ClassFinder.java:434)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Resolve.loadClass(Resolve.java:2052)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Resolve.findIdentInPackageInternal(Resolve.java:2450)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Resolve.findIdentInPackage(Resolve.java:2438)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.selectSym(Attr.java:4412)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:4297)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2450)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:4269)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2450)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribType(Attr.java:743)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribType(Attr.java:736)
       at org.netbeans.lib.nbjavac.services.NBAttr.attribType(NBAttr.java:91)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.MemberEnter.visitVarDef(MemberEnter.java:265)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:1027)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:163)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:1273)
       at org.netbeans.lib.nbjavac.services.NBAttr.visitVarDef(NBAttr.java:85)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:1027)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:751)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStats(Attr.java:770)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1448)
       at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:78)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1091)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:751)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitForLoop(Attr.java:1506)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCForLoop.accept(JCTree.java:1191)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:751)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStats(Attr.java:770)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1448)
       at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:78)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1091)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.DeferredAttr.attribSpeculative(DeferredAttr.java:500)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribToTree(Attr.java:429)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStatToTree(Attr.java:422)
       at org.netbeans.lib.nbjavac.services.NBAttr.attributeAndCapture(NBAttr.java:140)
       at org.netbeans.api.java.source.TreeUtilities.attributeTreeTo(TreeUtilities.java:930)
       at org.netbeans.api.java.source.TreeUtilities.attributeTreeTo(TreeUtilities.java:841)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.newVarName(JavaCodeTemplateProcessor.java:918)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.getProposedValue(JavaCodeTemplateProcessor.java:516)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.updateDefaultValues(JavaCodeTemplateProcessor.java:147)
       at org.netbeans.lib.editor.codetemplates.CodeTemplateInsertHandler.processTemplate(CodeTemplateInsertHandler.java:225)
       at org.netbeans.lib.editor.codetemplates.CodeTemplateManagerOperation.insert(CodeTemplateManagerOperation.java:273)
       at org.netbeans.lib.editor.codetemplates.api.CodeTemplate.insert(CodeTemplate.java:82)
       at org.netbeans.lib.editor.codetemplates.CodeTemplateCompletionItem.defaultAction(CodeTemplateCompletionItem.java:115)
       at org.netbeans.modules.editor.completion.CompletionLayout$CompletionPopup$1.mouseClicked(CompletionLayout.java:405)
       at java.desktop@17.0.2/java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:278)
   ```
   
   ```
     
    "AWT-EventQueue-0" - Thread t@30
       java.lang.Thread.State: RUNNABLE
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.util.IntHashTable.put(IntHashTable.java:127)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser$SimpleEndPosTable.storeEnd(JavacParser.java:4933)
       at org.netbeans.lib.nbjavac.services.NBParserFactory$NBJavacParser$EndPosTableImpl.storeEnd(NBParserFactory.java:166)
       at org.netbeans.lib.nbjavac.services.NBParserFactory$NBJavacParser$EndPosTableImpl.toP(NBParserFactory.java:183)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.toP(JavacParser.java:539)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.term3Rest(JavacParser.java:1630)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.term3(JavacParser.java:1490)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.term2(JavacParser.java:929)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.term1(JavacParser.java:900)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.term(JavacParser.java:856)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.term(JavacParser.java:836)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.forInit(JavacParser.java:3160)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.parseSimpleStatement(JavacParser.java:2796)
       at org.netbeans.lib.nbjavac.services.NBParserFactory$NBJavacParser.parseSimpleStatement(NBParserFactory.java:134)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.blockStatement(JavacParser.java:2632)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.blockStatements(JavacParser.java:2569)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.block(JavacParser.java:2539)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.block(JavacParser.java:2553)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.parseSimpleStatement(JavacParser.java:2781)
       at org.netbeans.lib.nbjavac.services.NBParserFactory$NBJavacParser.parseSimpleStatement(NBParserFactory.java:134)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.blockStatement(JavacParser.java:2632)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.parseStatementAsBlock(JavacParser.java:2594)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.parser.JavacParser.parseStatement(JavacParser.java:2933)
       at org.netbeans.api.java.source.TreeUtilities$$Lambda$764/0x0000000801956420.apply(Unknown Source)
       at org.netbeans.api.java.source.TreeUtilities.doParse(TreeUtilities.java:694)
       at org.netbeans.api.java.source.TreeUtilities.parseStatementImpl(TreeUtilities.java:622)
       at org.netbeans.api.java.source.TreeUtilities.parseStatement(TreeUtilities.java:618)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.assignmentSideType(JavaCodeTemplateProcessor.java:810)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.getProposedValue(JavaCodeTemplateProcessor.java:482)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.updateDefaultValues(JavaCodeTemplateProcessor.java:147)
       at org.netbeans.lib.editor.codetemplates.CodeTemplateInsertHandler.processTemplate(CodeTemplateInsertHandler.java:225)
       at org.netbeans.lib.editor.codetemplates.CodeTemplateManagerOperation.insert(CodeTemplateManagerOperation.java:273)
       at org.netbeans.lib.editor.codetemplates.api.CodeTemplate.insert(CodeTemplate.java:82)
       at org.netbeans.lib.editor.codetemplates.CodeTemplateCompletionItem.defaultAction(CodeTemplateCompletionItem.java:115)
       at org.netbeans.modules.editor.completion.CompletionLayout$CompletionPopup$1.mouseClicked(CompletionLayout.java:405)
       at java.desktop@17.0.2/java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:278)
   
   ```
   
   
   ```
    "AWT-EventQueue-0" - Thread t@30
       java.lang.Thread.State: RUNNABLE
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitApply(Attr.java:2567)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1797)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:723)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:1314)
       at org.netbeans.lib.nbjavac.services.NBAttr.visitVarDef(NBAttr.java:85)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:1027)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:751)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStats(Attr.java:770)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitForLoop(Attr.java:1496)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCForLoop.accept(JCTree.java:1191)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:751)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStats(Attr.java:770)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1448)
       at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:78)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1091)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:677)
       at app/jdk.compiler@17.0.2/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:751)
       at org.netbeans.api.java.source.TreeUtilities.attributeTree(TreeUtilities.java:892)
       at org.netbeans.api.java.source.TreeUtilities.attributeTree(TreeUtilities.java:826)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.assignmentSideType(JavaCodeTemplateProcessor.java:819)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.getProposedValue(JavaCodeTemplateProcessor.java:482)
       at org.netbeans.modules.editor.java.JavaCodeTemplateProcessor.updateDefaultValues(JavaCodeTemplateProcessor.java:147)
       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.lib.editor.codetemplates.CodeTemplateCompletionItem.defaultAction(CodeTemplateCompletionItem.java:115)
       at org.netbeans.modules.editor.completion.CompletionLayout$CompletionPopup$1.mouseClicked(CompletionLayout.java:405)
       at java.desktop@17.0.2/java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:278)
   
   ```


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[GitHub] [netbeans] mbien commented on issue #3803: Code template expansion with 'forc' causes NetBeans to hang

Posted by GitBox <gi...@apache.org>.
mbien commented on issue #3803:
URL: https://github.com/apache/netbeans/issues/3803#issuecomment-1070954780


   @ChristianPervoelz thanks, I can reproduce it using your minimal sample.


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[GitHub] [netbeans] mbien edited a comment on issue #3803: Code template expansion with 'forc' causes NetBeans to hang

Posted by GitBox <gi...@apache.org>.
mbien edited a comment on issue #3803:
URL: https://github.com/apache/netbeans/issues/3803#issuecomment-1070954780


   @ChristianPervoelz thanks, I can reproduce it using your minimal sample.
   
   its not specific to `forc`, iterator completion with `for` fails too
   
   for-over-collection works however


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[GitHub] [netbeans] mbien edited a comment on issue #3803: Code template expansion with 'forc' causes NetBeans to hang

Posted by GitBox <gi...@apache.org>.
mbien edited a comment on issue #3803:
URL: https://github.com/apache/netbeans/issues/3803#issuecomment-1070954780


   @ChristianPervoelz thanks, I can reproduce it using your minimal sample.
   
   its not specific to `forc`, iterator completion with `for` fails too
   
   for-over-collection works however


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[GitHub] [netbeans] jlahoda commented on issue #3803: Code template expansion with 'forc' causes NetBeans to hang

Posted by GitBox <gi...@apache.org>.
jlahoda commented on issue #3803:
URL: https://github.com/apache/netbeans/issues/3803#issuecomment-1073549009


   Hm, `updateDefaultValues` updates the values until they stabilize, but they don't stabilize, because the type for `IT_TYPE` oscillates between `java.util.Iterator` and `java.util.Iterator<? extends <nulltype>>` (which is obviously broken). The reason is probably captured type handling. Will try to take a look, unless @dbalek does.


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