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Posted to dev@xalan.apache.org by "Carlo Marchiori (JIRA)" <xa...@xml.apache.org> on 2004/11/15 15:21:23 UTC

[jira] Created: (XALANJ-1991) StackOverflowException comparing two strings

StackOverflowException comparing two strings
--------------------------------------------

         Key: XALANJ-1991
         URL: http://nagoya.apache.org/jira/browse/XALANJ-1991
     Project: XalanJ2
        Type: Bug
  Components: Xalan  
    Versions: 2.4, 2.5Dx, 2.5, 2.6    
 Environment: Any
    Reporter: Carlo Marchiori


java.lang.StackOverflowError
	at org.apache.xpath.objects.XStringForChars.hasString(XStringForChars.java:97)
	at org.apache.xpath.objects.XString.equals(XString.java:401)
	at org.apache.xpath.objects.XString.equals(XString.java:402)
	at org.apache.xpath.objects.XString.equals(XString.java:402)
	at org.apache.xpath.objects.XString.equals(XString.java:402)
	at org.apache.xpath.objects.XString.equals(XString.java:402)
.......

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[jira] Resolved: (XALANJ-1991) StackOverflowException comparing two strings

Posted by "Henry Zongaro (JIRA)" <xa...@xml.apache.org>.
     [ https://issues.apache.org/jira/browse/XALANJ-1991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Henry Zongaro resolved XALANJ-1991.
-----------------------------------

    Resolution: Duplicate

This appears to be the same as the problem described in Jira issue XALANJ-1243.  The patch attached to that bug report appears to resolve this issue.

> StackOverflowException comparing two strings
> --------------------------------------------
>
>                 Key: XALANJ-1991
>                 URL: https://issues.apache.org/jira/browse/XALANJ-1991
>             Project: XalanJ2
>          Issue Type: Bug
>          Components: Xalan, XPath
>    Affects Versions: 2.6
>         Environment: Any
>            Reporter: Carlo Marchiori
>         Attachments: XALANJ-1991-usecase.zip
>
>
> java.lang.StackOverflowError
> 	at org.apache.xpath.objects.XStringForChars.hasString(XStringForChars.java:97)
> 	at org.apache.xpath.objects.XString.equals(XString.java:401)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> .......

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[jira] Updated: (XALANJ-1991) StackOverflowException comparing two strings

Posted by "Brian Minchau (JIRA)" <xa...@xml.apache.org>.
     [ http://nagoya.apache.org/jira/browse/XALANJ-1991?page=history ]

Brian Minchau updated XALANJ-1991:
----------------------------------

    Component: XPath

> StackOverflowException comparing two strings
> --------------------------------------------
>
>          Key: XALANJ-1991
>          URL: http://nagoya.apache.org/jira/browse/XALANJ-1991
>      Project: XalanJ2
>         Type: Bug
>   Components: Xalan, XPath
>     Versions: 2.4, 2.5Dx, 2.5, 2.6
>  Environment: Any
>     Reporter: Carlo Marchiori
>  Attachments: XALANJ-1991-usecase.zip
>
> java.lang.StackOverflowError
> 	at org.apache.xpath.objects.XStringForChars.hasString(XStringForChars.java:97)
> 	at org.apache.xpath.objects.XString.equals(XString.java:401)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> .......

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[jira] Updated: (XALANJ-1991) StackOverflowException comparing two strings

Posted by "Carlo Marchiori (JIRA)" <xa...@xml.apache.org>.
     [ http://nagoya.apache.org/jira/browse/XALANJ-1991?page=history ]

Carlo Marchiori updated XALANJ-1991:
------------------------------------

    Attachment: XALANJ-1991-usecase.zip

Example to recreate the problem.

> StackOverflowException comparing two strings
> --------------------------------------------
>
>          Key: XALANJ-1991
>          URL: http://nagoya.apache.org/jira/browse/XALANJ-1991
>      Project: XalanJ2
>         Type: Bug
>   Components: Xalan
>     Versions: 2.4, 2.5Dx, 2.5, 2.6
>  Environment: Any
>     Reporter: Carlo Marchiori
>  Attachments: XALANJ-1991-usecase.zip
>
> java.lang.StackOverflowError
> 	at org.apache.xpath.objects.XStringForChars.hasString(XStringForChars.java:97)
> 	at org.apache.xpath.objects.XString.equals(XString.java:401)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> .......

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[jira] Commented: (XALANJ-1991) StackOverflowException comparing two strings

Posted by "Henry Zongaro (JIRA)" <xa...@xml.apache.org>.
    [ http://issues.apache.org/jira/browse/XALANJ-1991?page=comments#action_12459660 ] 
            
Henry Zongaro commented on XALANJ-1991:
---------------------------------------

I just happened to notice that all four of these issues (XALANJ-1243, XALANJ-1880, XALANJ-1991 and XALANJ-2001) appear to be related to one another because they all seem to describe the same problem with XString.equals, but I haven't investigated further to be certain of that, so I just thought I'd provide that information.  XALANJ-2001 contains a patch that avoids the problem, but I didn't like the patch at the same, so it's never been applied.

> StackOverflowException comparing two strings
> --------------------------------------------
>
>                 Key: XALANJ-1991
>                 URL: http://issues.apache.org/jira/browse/XALANJ-1991
>             Project: XalanJ2
>          Issue Type: Bug
>          Components: XPath, Xalan
>    Affects Versions: 2.6
>         Environment: Any
>            Reporter: Carlo Marchiori
>         Attachments: XALANJ-1991-usecase.zip
>
>
> java.lang.StackOverflowError
> 	at org.apache.xpath.objects.XStringForChars.hasString(XStringForChars.java:97)
> 	at org.apache.xpath.objects.XString.equals(XString.java:401)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> .......

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[jira] Commented: (XALANJ-1991) StackOverflowException comparing two strings

Posted by "Carlo Marchiori (JIRA)" <xa...@xml.apache.org>.
     [ http://nagoya.apache.org/jira/browse/XALANJ-1991?page=comments#action_55497 ]
     
Carlo Marchiori commented on XALANJ-1991:
-----------------------------------------

Proposed fix.

The problem is with the class org.apache.xpath.objects.XMLString

and in particular with the method

---------------------------------------
  public boolean equals(XMLString obj2)
  {
      if (!obj2.hasString())
          return obj2.equals(this);
      else
          return str().equals(obj2.toString());
  }
-------------------------------------------

When both obj2 and this return false on 'hasString' and infinite loop occurs. So
my proposed fix is 

----------------------------------
  public boolean equals(XMLString obj2)
  {
//    if (!obj2.hasString())           
      if (!obj2.hasString() && this.hasString())
          return obj2.equals(this);
      else
          return str().equals(obj2.toString());
  }
-------------------------------------

> StackOverflowException comparing two strings
> --------------------------------------------
>
>          Key: XALANJ-1991
>          URL: http://nagoya.apache.org/jira/browse/XALANJ-1991
>      Project: XalanJ2
>         Type: Bug
>   Components: Xalan
>     Versions: 2.4, 2.5Dx, 2.5, 2.6
>  Environment: Any
>     Reporter: Carlo Marchiori
>  Attachments: XALANJ-1991-usecase.zip
>
> java.lang.StackOverflowError
> 	at org.apache.xpath.objects.XStringForChars.hasString(XStringForChars.java:97)
> 	at org.apache.xpath.objects.XString.equals(XString.java:401)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> 	at org.apache.xpath.objects.XString.equals(XString.java:402)
> .......

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