[PDFBOX-2679] Blank page rendered with wrong xref start objid

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: Parsing
• Assignee: Andreas Lehmkühler
• Reporter: Tilman Hausherr
• Created: 11/Feb/15 21:42
• Updated: 17/Mar/16 19:08
• Resolved: 24/Mar/15 10:58

Description

From Kevin M. on the users mailing list:
A confidential file doesn't display its image because the objid is unaccessible, due to a malformed xref table:

xref
1 7
0000000000 65535 f
0000000009 00000 n
0000358745 00000 n
0000358842 00000 n
0000359029 00000 n
0000359087 00000 n
0000359138 00000 n
trailer 

The first number (1) means the number of the first object. So it would be 1. The second number(7) is the size of the table. The number 1 is incorrect, it should be 0, because "0000000000 65535 f" is the dummy object 0.
From the pdf spec:

The free entries in the cross-reference table form a linked list, with each free entry containing the object number of the next. The first entry in the table (object number 0) is always free and has a generation number of 65,535; it is the head of the linked list of free objects

The error messages are:

Can't find the object 7 0 (origin offset 359138)

Missing XObject: Im1 (Im1 is the object at 7 0, and is the missing image)

Issue Links

• is related to: PDFBOX-2983 Corrupted PDF after adding text