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From "Sebb (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (NET-185) Possible NPE in Threader.java
Date Mon, 23 Mar 2009 00:18:52 GMT

     [ https://issues.apache.org/jira/browse/NET-185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sebb reopened NET-185:
----------------------


The for loop can exit with tail == null if old.child == null.

> Possible NPE in Threader.java
> -----------------------------
>
>                 Key: NET-185
>                 URL: https://issues.apache.org/jira/browse/NET-185
>             Project: Commons Net
>          Issue Type: Bug
>         Environment: Fortify
>            Reporter: Henri Yandell
>            Priority: Minor
>             Fix For: 2.1
>
>
> In Threader.gatherSubjects, it appears to be possible for tail.next = c.child; to be
null [line 356]:
> 	349	 if (old.threadable == null && c.threadable == null) {
> 	350		// both dummies - merge them
> 	351		ThreadContainer tail;
> 	352		for (tail = old.child;
> 	353		tail != null && tail.next != null;
> 	354		tail = tail.next);
> 	355	
> 	356		tail.next = c.child;
> It also seems kind of pointless, given that the subsequent line immediately resets tail
to c.child. Perhaps the ; is not intended there?

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