Matthias Bläsing created NETBEANS-194:
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Summary: JShell integration causes NULL Pointer exception on JDK9
Key: NETBEANS-194
URL: https://issues.apache.org/jira/browse/NETBEANS-194
Project: NetBeans
Issue Type: Bug
Components: java - JShell
Affects Versions: 9.0
Reporter: Matthias Bläsing
Assignee: Matthias Bläsing
I ran netbeans with JDK 9.0.1 and tested the JShell integration. While running
it, I received two NullPointerExceptions:
*Steps to reproduce:*
- run netbeans with JDK 9.0.1: {{ant -Dnbjdk.home=<JDK9> tryme}}
- Create a "Java Application" project.
- Choose "Execute Java Shell"
- Observe the output in the console
*Result 1: Exception instead of JShell:*
{noformat}
[exec] java.lang.NullPointerException
[exec] at
org.netbeans.modules.jshell.support.ShellSession.customizeBuilderOnJDK9(ShellSession.java:787)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.customizeBuilder(ShellSession.java:743)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.access$700(ShellSession.java:148)
[exec] at
org.netbeans.modules.jshell.support.ShellSession$Launcher.makeBuilder(ShellSession.java:623)
[exec] at
org.netbeans.modules.jshell.tool.JShellLauncher.createJShellInstance(JShellLauncher.java:250)
[exec] at
org.netbeans.modules.jshell.support.ShellSession$Launcher.createJShellInstance(ShellSession.java:628)
[exec] at
org.netbeans.modules.jshell.tool.JShellTool.resetState(JShellTool.java:745)
[exec] at
org.netbeans.modules.jshell.tool.JShellLauncher.resetState(JShellLauncher.java:207)
[exec] at
org.netbeans.modules.jshell.tool.JShellLauncher.ensureLive(JShellLauncher.java:195)
[exec] at
org.netbeans.modules.jshell.tool.JShellLauncher.getJShell(JShellLauncher.java:201)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.initJShell(ShellSession.java:830)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.getJShell(ShellSession.java:314)
[exec] [catch] at
org.netbeans.modules.jshell.support.ShellSession.lambda$null$2(ShellSession.java:519)
[exec] at
org.netbeans.modules.jshell.model.ConsoleModel$ModelAccImpl.execute(ConsoleModel.java:1104)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.lambda$start$3(ShellSession.java:515)
[exec] at
org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
[exec] at
org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
[exec] at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
[exec] at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
{noformat}
*After fix (return empty list instead of NULL):*
{noformat}
[exec] java.lang.NullPointerException
[exec] at
org.netbeans.modules.jshell.env.JShellEnvironment.customizeJShell(JShellEnvironment.java:270)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.customizeBuilder(ShellSession.java:745)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.access$700(ShellSession.java:148)
[exec] at
org.netbeans.modules.jshell.support.ShellSession$Launcher.makeBuilder(ShellSession.java:623)
[exec] at
org.netbeans.modules.jshell.tool.JShellLauncher.createJShellInstance(JShellLauncher.java:250)
[exec] at
org.netbeans.modules.jshell.support.ShellSession$Launcher.createJShellInstance(ShellSession.java:628)
[exec] at
org.netbeans.modules.jshell.tool.JShellTool.resetState(JShellTool.java:745)
[exec] at
org.netbeans.modules.jshell.tool.JShellLauncher.resetState(JShellLauncher.java:207)
[exec] at
org.netbeans.modules.jshell.tool.JShellLauncher.ensureLive(JShellLauncher.java:195)
[exec] at
org.netbeans.modules.jshell.tool.JShellLauncher.getJShell(JShellLauncher.java:201)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.initJShell(ShellSession.java:830)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.getJShell(ShellSession.java:314)
[exec] [catch] at
org.netbeans.modules.jshell.support.ShellSession.lambda$null$2(ShellSession.java:519)
[exec] at
org.netbeans.modules.jshell.model.ConsoleModel$ModelAccImpl.execute(ConsoleModel.java:1104)
[exec] at
org.netbeans.modules.jshell.support.ShellSession.lambda$start$3(ShellSession.java:515)
[exec] at
org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
[exec] at
org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
[exec] at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
[exec] at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
{noformat}
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