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https://issues.apache.org/jira/browse/NETBEANS-407?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jan Lahoda resolved NETBEANS-407.
---------------------------------
Resolution: Fixed
Assignee: Jan Lahoda
Fix Version/s: 9.0
Should be fixed by:
[https://github.com/apache/incubator-netbeans/commit/3bb6c7396a58ef75930148c30a3bb05baf0c06e6]
> "Dereferencing possible null pointer" after doing instanceof on variable
> (false positive)
> -----------------------------------------------------------------------------------------
>
> Key: NETBEANS-407
> URL: https://issues.apache.org/jira/browse/NETBEANS-407
> Project: NetBeans
> Issue Type: Bug
> Components: java - Hints
> Affects Versions: 8.2, 9.0
> Reporter: Eirik Bakke
> Assignee: Jan Lahoda
> Priority: Minor
> Labels: pull-request-available
> Fix For: 9.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In the following example, the "boolean foo = k instanceof Integer" assignment
> causes a spurious "Dereferencing possible null pointer" warning to occur on
> the "k.doubleValue()" expression. I believe this did not happen in earlier
> NetBeans versions (pre-8.2). Note that if the assignment to "boolean foo" is
> replaced by an if statement ("if (k instanceof Integer)"), the warning goes
> away.
> {code:java}
> public class TestClass {
> private Number getFoo() {
> return 3;
> }
> public void testFoo() {
> Number k = getFoo();
> // The warning only occurs if this assignment is present.
> boolean foo = k instanceof Integer;
> // Warning on .doubleValue() here: "Dereferencing possible null pointer"
> System.out.println(k.doubleValue());
> }
> }
> {code}
> This bug was previously described at
> https://netbeans.org/bugzilla/show_bug.cgi?id=269324 .
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