[jira] [Created] (NETBEANS-5667) False positive: Dereferencing possible Null Pointer Exception

["Nakarukatoshi (Jira)" <ji...@apache.org>]

Nakarukatoshi created NETBEANS-5667:
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             Summary: False positive: Dereferencing possible Null Pointer Exception
                 Key: NETBEANS-5667
                 URL: https://issues.apache.org/jira/browse/NETBEANS-5667
             Project: NetBeans
          Issue Type: Bug
    Affects Versions: 12.3
            Reporter: Nakarukatoshi
         Attachments: prove.png

As posted on [NETBEANS-1480], here is another clear example of the fake NullPointerException:

{{public static void foo(Object bar) {}}
{{    Objects.requireNonNull(bar, "[bar] must not be null.");}}
{{    if (bar instanceof String) {}}
{{        System.out.println(bar.toString());}}
{{    } else {}}
{{        throw new IllegalArgumentException("[" + bar.{color:#de350b}getClass{color}().getSimpleName() + "] not supported.");}}
{{    }}}
{{ }}}

{{In other words, after the Objects#requireNonNull(Object, String) check, if I do an if-else with an instanceof operator, the "else" section will warn about a NullPointerException (the red method)}}



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