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Hi,

I am noticing an error when compressing/decompressing using xz on Fedora 20. I 
was initially using xz-5.1.2-8alpha.fc20.x86_64 but then upgraded to 
xz-5.1.2-12alpha.fc20.x86_64 to see if that would fix things, but it didn't seem
to help.

I have a file at [1] that I am compressing/decompressing using xz. I first 
uncompress
it so that it is a plain text file and then compress it with xz. I then 
decompress it
back to plain text and compare with the original. I keep getting differences.. 
For example:

[dustymabe@localhost traces]$ cat /tmp/diffs 
- --- /mnt/SEQ_LBM.t.gz.uncompressed      2015-01-04 17:14:33.178364955 -0500
+++ /mnt/SEQ_LBM.t.xz.uncompressed      2015-01-04 20:32:20.951230115 -0500
@@ -125953555,7 +125953555,7 @@
 r 0x7f0422a8
 w 0x7a7a0218
 r 0x6d480000
- -r 0x7f0422a8
+p 0x7f0422a8
 w 0x7a7a00e0
 r 0x6d480008
 r 0x7f0422a8


Can someone please download the file at [1] (~194M) and run a similar test on 
it? 
The sums on the file are as follows for the gz compressed and uncompressed 
forms:

[dustymabe@localhost traces]$ sha256sum SEQ_LBM.t.gz 
/mnt/SEQ_LBM.t.gz.uncompressed 
017b3456df8e658e2e50ff3f33ca66ce11eb91b59abfd6c3d259502b53951608  SEQ_LBM.t.gz
ca07c3604b104631bf377cac62537a40bd79be1c3971a23e7605843d5c588e72  
/mnt/SEQ_LBM.t.gz.uncompressed

Please confirm if you see the behavior or not or possibly point me to a 
bug/commit
where this issue was already fixed.

Thanks,
Dusty

[1] - https://www.dropbox.com/s/mebey21eynzt1lq/SEQ_LBM.t.gz?dl=0
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