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http://issues.apache.org/bugzilla/show_bug.cgi?id=41761

           Summary: NullPointerException in Sheet#serializeIndexRecord
           Product: POI
           Version: 3.0-dev
          Platform: Other
        OS/Version: other
            Status: NEW
          Keywords: PatchAvailable
          Severity: normal
          Priority: P2
         Component: HSSF
        AssignedTo: poi-dev@jakarta.apache.org
        ReportedBy: [EMAIL PROTECTED]


When writing a HSSFWorkbook containing a HSSFSheet with an empty HSSFRow (ie. a
row with no cells), a NPE is thrown:

The Sample Code:
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet();
sheet.createRow(0);
workbook.write(new ByteArrayOutputStream());


The StackTrace:
java.lang.NullPointerException
        at org.apache.poi.hssf.model.Sheet.serializeIndexRecord(Sheet.java:787)
        at org.apache.poi.hssf.model.Sheet.serialize(Sheet.java:731)
        at 
org.apache.poi.hssf.usermodel.HSSFWorkbook.getBytes(HSSFWorkbook.java:963)
        at 
org.apache.poi.hssf.usermodel.HSSFWorkbook.write(HSSFWorkbook.java:901)
        at org.apache.poi.hssf.model.MyTestSheet.test(MyTestSheet.java:16)
        ...

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