Eirik Bakke created NETBEANS-4259:
-------------------------------------
Summary: NPE in code completion when in incorrect cast syntax
Key: NETBEANS-4259
URL: https://issues.apache.org/jira/browse/NETBEANS-4259
Project: NetBeans
Issue Type: Bug
Components: java - Source
Affects Versions: 11.3
Environment: NetBeans 11.3 on Windows (OS shouldn't matter)
Reporter: Eirik Bakke
In the following class, put the cursor after "dat" and invoke code completion
(Ctrl+Space). This situation often happens from muscle memory while typing a
cast. A NPE will result:
{code:java}
public class TestFoo {
private String someMethod(Object someArg) {
if (someArg instanceof String)
return (String dat); // To see parser error, open code completion with
cursor after "dat
return null;
}
}
{code}
The desired behavior is to just ignore the incorrect syntax, and perform no
completion. Instead, the following exception is shown:
{noformat}
java.lang.NullPointerException
at
org.netbeans.modules.java.completion.BaseTask.getEnvImpl(BaseTask.java:389)
at
org.netbeans.modules.java.completion.BaseTask.getCompletionEnvironment(BaseTask.java:270)
at
org.netbeans.modules.java.completion.JavaCompletionTask.resolve(JavaCompletionTask.java:297)
at org.netbeans.modules.java.completion.BaseTask.run(BaseTask.java:94)
at
org.netbeans.modules.java.completion.JavaCompletionTask.run(JavaCompletionTask.java:60)
at
org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:586)
at
org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:130)
at
org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:114)
at
org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:181)
at
org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:178)
at
org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:153)
at
org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:335)
at
org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:118)
at
org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:67)
at
org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:178)
Caused: org.netbeans.modules.parsing.spi.ParseException
at
org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:186)
at
org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:81)
[catch] at
org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.query(JavaCompletionProvider.java:193)
at
org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:198)
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}
Reporting this bug in case a pattern emerges where various kinds of errors like
this pop up instead of being silently ignored.
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