JDK-8067735 : Compile failed, NPE when using functions in stream().map()
  • Type: Bug
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 8u5
  • Priority: P4
  • Status: Closed
  • Resolution: Duplicate
  • OS: windows_7
  • CPU: x86_64
  • Submitted: 2014-07-02
  • Updated: 2015-02-03
  • Resolved: 2015-01-07
Related Reports
Duplicate :  
JDK-8041713 - Type inference of non-existent method references crashes the compiler
Description
FULL PRODUCT VERSION :
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
error occured when i try compile this code

private ResponseListener commentsListener = new ResponseListener() {

        @Override
        public void receive(NModel nmodel) {
            NList<NModel> ticketsList = nmodel.getAsList(NSchema.LIST);
            DefaultListModel<String> dlm = new DefaultListModel<>(ticketsList.stream().map(item -> commentToString(item)).collect(Collectors.toArray()));
            getTicketsList().setModel(dlm);
        }

        @Override
        public void handleError(Response rspns) {
            System.out.println(rspns.getErrorMessage());
        }
    };
    
    private String commentToString(NModel comment) {
        StringBuilder builder = new StringBuilder();
        builder.append("author ");
        builder.append(comment.getAsString(CommentSchema.FIELD_AUTHOR));
        builder.append(" ");
        builder.append(comment.getAsString(CommentSchema.FIELD_DATE));
        builder.append(" ");
        builder.append(comment.getAsString(CommentSchema.FIELD_TEXT));
        return builder.toString();
    }


ERROR MESSAGES/STACK TRACES THAT OCCUR :
An exception has occurred in the compiler (1.8.0). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport)  after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report.  Thank you.
java.lang.NullPointerException
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitIdent(Flow.java:2327)
	at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:2005)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.tree.TreeScanner.visitSelect(TreeScanner.java:264)
	at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1891)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scanExpr(Flow.java:1596)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitApply(Flow.java:2204)
	at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1459)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.tree.TreeScanner.visitSelect(TreeScanner.java:264)
	at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1891)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scanExpr(Flow.java:1596)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitApply(Flow.java:2204)
	at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1459)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.tree.TreeScanner.visitSelect(TreeScanner.java:264)
	at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1891)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scanExpr(Flow.java:1596)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitApply(Flow.java:2204)
	at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1459)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scanExpr(Flow.java:1596)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scanExprs(Flow.java:1608)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitNewClass(Flow.java:2210)
	at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1510)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scanExpr(Flow.java:1596)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitVarDef(Flow.java:1806)
	at com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitVarDef(Flow.java:2521)
	at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:846)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitBlock(Flow.java:1815)
	at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:903)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitMethodDef(Flow.java:1753)
	at com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitMethodDef(Flow.java:2507)
	at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:772)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitClassDef(Flow.java:1705)
	at com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitClassDef(Flow.java:2486)
	at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:687)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitNewClass(Flow.java:2211)
	at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1510)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scanExpr(Flow.java:1596)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitVarDef(Flow.java:1806)
	at com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitVarDef(Flow.java:2521)
	at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:846)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitClassDef(Flow.java:1698)
	at com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitClassDef(Flow.java:2486)
	at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:687)
	at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
	at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:389)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1367)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.analyzeTree(Flow.java:2370)
	at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.analyzeTree(Flow.java:2353)
	at com.sun.tools.javac.comp.Flow.analyzeTree(Flow.java:210)
	at com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1325)
	at com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1299)
	at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:904)
	at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:863)
	at com.sun.tools.javac.main.Main.compile(Main.java:523)
	at com.sun.tools.javac.main.Main.compile(Main.java:381)
	at com.sun.tools.javac.main.Main.compile(Main.java:370)
	at com.sun.tools.javac.main.Main.compile(Main.java:361)
	at com.sun.tools.javac.Main.compile(Main.java:56)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:56)
	at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1153)
	at org.netbeans.nbbuild.CustomJavac.compile(CustomJavac.java:124)
	at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:930)
	at org.netbeans.nbbuild.CustomJavac.execute(CustomJavac.java:105)
	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
	at sun.reflect.GeneratedMethodAccessor3554.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
	at org.apache.tools.ant.Task.perform(Task.java:348)
	at org.apache.tools.ant.Target.execute(Target.java:435)
	at org.apache.tools.ant.Target.performTasks(Target.java:456)
	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
	at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
	at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
	at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
	at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:286)
	at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:555)
	at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153)
C:\Program Files\NetBeans 8.0\harness\common.xml:217: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 8 seconds)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
private ResponseListener commentsListener = new ResponseListener() {

        @Override
        public void receive(NModel nmodel) {
            NList<NModel> ticketsList = nmodel.getAsList(NSchema.LIST);
            DefaultListModel<String> dlm = new DefaultListModel<>(ticketsList.stream().map(item -> commentToString(item)).collect(Collectors.toArray()));
            getTicketsList().setModel(dlm);
        }

        @Override
        public void handleError(Response rspns) {
            System.out.println(rspns.getErrorMessage());
        }
    };
    
    private String commentToString(NModel comment) {
        StringBuilder builder = new StringBuilder();
        builder.append("author ");
        builder.append(comment.getAsString(CommentSchema.FIELD_AUTHOR));
        builder.append(" ");
        builder.append(comment.getAsString(CommentSchema.FIELD_DATE));
        builder.append(" ");
        builder.append(comment.getAsString(CommentSchema.FIELD_TEXT));
        return builder.toString();
    }
---------- END SOURCE ----------
Comments
This is a duplicate of JDK-8041713
07-01-2015
Sent an email to the submitter requesting a complete test case.
17-12-2014
It's hard to create a stand-alone reproducer given the provided code snippet. I wonder if this might be a mistake in the code: Collectors.toArray() - I can't find this method.
03-07-2014