GNU logs - #27241, boring messages

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Subject: bug#27241: diff command modified my file
Resent-From: Hong Jehn <hongjehn@HIDDEN>
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When I use command "diff -qr abc/ usb/abc/" to compare 2 directory,  it chan=
ges the "centos_7_x86_64_Minimal.iso" sometime but the file size didn't chan=
ge even when I just ran the same command and it says they are the same. Othe=
r file are fine, it changes only this iso file.

Also, I wrote a similler program like diff before it came out the same probl=
em. I guess it's a glibc bug? I kept the broken file in case you need it.

This problem comes out like once a week, I kept the sha256-code but this pro=
blem seems serious.=

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Hong Jehn <hongjehn@HIDDEN>
Subject: bug#27241: Acknowledgement (diff command modified my file)
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Message sent to bug-diffutils@HIDDEN:

Subject: bug#27241: [bug-diffutils] bug#27241: diff command modified my file
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Hong Jehn wrote:
> When I use command "diff -qr abc/ usb/abc/" to compare 2 directory,  it changes the "centos_7_x86_64_Minimal.iso" sometime but the file size didn't change even when I just ran the same command and it says they are the same. Other file are fine, it changes only this iso file.
> 
> Also, I wrote a similler program like diff before it came out the same problem. I guess it's a glibc bug? I kept the broken file in case you need it.
> 
> This problem comes out like once a week, I kept the sha256-code but this problem seems serious.
> 
> 

Since the problem affects multiple programs, it must be something else in your 
system, either in the C library or (more likely) in the underlying file system 
code or something like that.

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