The exact version of the "good" par2 is 0.4-11 ( the one on wheezy/oldstable)
I attach 4 files corresponding to some tests I made with this bug. I generated a random file of 20MB, then created some par2 with the 0.6 version : "par2 c testdatafile" Then I have applied 2 different types of modification with a hex editor : 1 - a modification of one byte at the beginning of the test file, resulting in the corruption of one data block. That's the attachments named "corrupted". And both version behave correctly. 2- a deletion of one byte (the attachments named "deleted"), and here the behavior is different for the 2 versions. On the 0.4, it detect just one bad block. With the 0.6 version all the blocks after the corruption are wrongfully detected corrupted.
$ par2 v testdatafile.par2 par2cmdline version 0.4, Copyright (C) 2003 Peter Brian Clements. par2cmdline comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See COPYING for details. Loading "testdatafile.par2". Loaded 4 new packets Loading "testdatafile.vol063+37.par2". Loaded 37 new packets including 37 recovery blocks Loading "testdatafile.vol003+04.par2". Loaded 4 new packets including 4 recovery blocks Loading "testdatafile.vol031+32.par2". Loaded 32 new packets including 32 recovery blocks Loading "testdatafile.vol000+01.par2". Loaded 1 new packets including 1 recovery blocks Loading "testdatafile.vol007+08.par2". Loaded 8 new packets including 8 recovery blocks Loading "testdatafile.vol015+16.par2". Loaded 16 new packets including 16 recovery blocks Loading "testdatafile.vol001+02.par2". Loaded 2 new packets including 2 recovery blocks There are 1 recoverable files and 0 other files. The block size used was 10488 bytes. There are a total of 2000 data blocks. The total size of the data files is 20971520 bytes. Verifying source files: Target: "testdatafile" - damaged. Found 1999 of 2000 data blocks. Scanning extra files: Repair is required. 1 file(s) exist but are damaged. You have 1999 out of 2000 data blocks available. You have 100 recovery blocks available. Repair is possible. You have an excess of 99 recovery blocks. 1 recovery blocks will be used to repair.
$ par2 v testdatafile.par2 par2cmdline version 0.4, Copyright (C) 2003 Peter Brian Clements. par2cmdline comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See COPYING for details. Loading "testdatafile.par2". Loaded 4 new packets Loading "testdatafile.vol063+37.par2". Loaded 37 new packets including 37 recovery blocks Loading "testdatafile.vol003+04.par2". Loaded 4 new packets including 4 recovery blocks Loading "testdatafile.vol031+32.par2". Loaded 32 new packets including 32 recovery blocks Loading "testdatafile.vol000+01.par2". Loaded 1 new packets including 1 recovery blocks Loading "testdatafile.vol007+08.par2". Loaded 8 new packets including 8 recovery blocks Loading "testdatafile.vol015+16.par2". Loaded 16 new packets including 16 recovery blocks Loading "testdatafile.vol001+02.par2". Loaded 2 new packets including 2 recovery blocks There are 1 recoverable files and 0 other files. The block size used was 10488 bytes. There are a total of 2000 data blocks. The total size of the data files is 20971520 bytes. Verifying source files: Target: "testdatafile" - damaged. Found 1999 of 2000 data blocks. Scanning extra files: Repair is required. 1 file(s) exist but are damaged. You have 1999 out of 2000 data blocks available. You have 100 recovery blocks available. Repair is possible. You have an excess of 99 recovery blocks. 1 recovery blocks will be used to repair.
$ par2 v testdatafile.par2 Loading "testdatafile.par2". Loaded 4 new packets Loading "testdatafile.vol063+37.par2". Loaded 37 new packets including 37 recovery blocks Loading "testdatafile.vol003+04.par2". Loaded 4 new packets including 4 recovery blocks Loading "testdatafile.vol031+32.par2". Loaded 32 new packets including 32 recovery blocks Loading "testdatafile.vol000+01.par2". Loaded 1 new packets including 1 recovery blocks Loading "testdatafile.vol007+08.par2". Loaded 8 new packets including 8 recovery blocks Loading "testdatafile.vol015+16.par2". Loaded 16 new packets including 16 recovery blocks Loading "testdatafile.vol001+02.par2". Loaded 2 new packets including 2 recovery blocks Loading "testdatafile.par2". No new packets found There are 1 recoverable files and 0 other files. The block size used was 10488 bytes. There are a total of 2000 data blocks. The total size of the data files is 20971520 bytes. Verifying source files: Target: "testdatafile" - damaged. Found 1999 of 2000 data blocks. Scanning extra files: Repair is required. 1 file(s) exist but are damaged. You have 1999 out of 2000 data blocks available. You have 100 recovery blocks available. Repair is possible. You have an excess of 99 recovery blocks. 1 recovery blocks will be used to repair.
$ par2 v testdatafile.par2 Loading "testdatafile.par2". Loaded 4 new packets Loading "testdatafile.vol063+37.par2". Loaded 37 new packets including 37 recovery blocks Loading "testdatafile.vol003+04.par2". Loaded 4 new packets including 4 recovery blocks Loading "testdatafile.vol031+32.par2". Loaded 32 new packets including 32 recovery blocks Loading "testdatafile.vol000+01.par2". Loaded 1 new packets including 1 recovery blocks Loading "testdatafile.vol007+08.par2". Loaded 8 new packets including 8 recovery blocks Loading "testdatafile.vol015+16.par2". Loaded 16 new packets including 16 recovery blocks Loading "testdatafile.vol001+02.par2". Loaded 2 new packets including 2 recovery blocks Loading "testdatafile.par2". No new packets found There are 1 recoverable files and 0 other files. The block size used was 10488 bytes. There are a total of 2000 data blocks. The total size of the data files is 20971520 bytes. Verifying source files: File: "testdatafile" - no data found. Scanning extra files: Repair is required. 1 file(s) exist but are damaged. You have 0 out of 2000 data blocks available. You have 100 recovery blocks available. Repair is not possible. You need 1900 more recovery blocks to be able to repair.
