bug of sort??

[jiusheng chen]

Experiment 1:
------------------------------------
OS: Linux version 2.6.18.1.2007050801 (address@hidden) (gcc version 3.3.5
(Debian 1:3.3.5-13)) #2 SMP Tue May 8 16:16:05 EDT 2007
Sort version: sort (coreutils) 5.2.1
Input: T, tsv file, two columns

$ cat T
Acer India      /guid/9202a8c04000641f8000000000875b5c
20th Century Fox Animation      /guid/9202a8c04000641f8000000000923a5a
20th Century Fox Television     /guid/9202a8c04000641f8000000000d38838
20th Century Fox        /guid/9202a8c04000641f8000000000136722
Acer Computer Australia /guid/9202a8c04000641f8000000000876087
Acer    /guid/9202a8c04000641f800000000021b67f
Acergy  /guid/9202a8c04000641f8000000000f082b3
Acerinox        /guid/9202a8c04000641f8000000000ddcbc9
Acer Laboratories Incorporated  /guid/9202a8c04000641f8000000000c9f469

$ sort -t "   " -k 1 T (it is tab, not space, i'm sure)
20th Century Fox Animation      /guid/9202a8c04000641f8000000000923a5a
20th Century Fox        /guid/9202a8c04000641f8000000000136722
(****************oops here*********************)
20th Century Fox Television     /guid/9202a8c04000641f8000000000d38838
Acer Computer Australia /guid/9202a8c04000641f8000000000876087
Acer    /guid/9202a8c04000641f800000000021b67f   (****************oops
here*********************)
Acergy  /guid/9202a8c04000641f8000000000f082b3
Acer India      /guid/9202a8c04000641f8000000000875b5c
Acerinox        /guid/9202a8c04000641f8000000000ddcbc9
Acer Laboratories Incorporated  /guid/9202a8c04000641f8000000000c9f469


Experiment 2:
------------------------------------
OS: Linux version 2.6.20-15-generic (address@hidden) (gcc version 4.1.2 (Ubuntu
4.1.2-0ubuntu4)) #2 SMP Sun Apr 15 07:36:31 UTC 2007
Sort version: sort 5.97
Input: same as the previous

$ sort -t "   " -k 1 T
20th Century Fox Animation      /guid/9202a8c04000641f8000000000923a5a
20th Century Fox        /guid/9202a8c04000641f8000000000136722
(****************oops here*********************)
20th Century Fox Television     /guid/9202a8c04000641f8000000000d38838
Acer Computer Australia /guid/9202a8c04000641f8000000000876087
Acer    /guid/9202a8c04000641f800000000021b67f  (****************oops
here*********************)
Acergy  /guid/9202a8c04000641f8000000000f082b3
Acer India      /guid/9202a8c04000641f8000000000875b5c
Acerinox        /guid/9202a8c04000641f8000000000ddcbc9
Acer Laboratories Incorporated  /guid/9202a8c04000641f8000000000c9f469

Experiment 3:
------------------------------------
OS: Linux version 2.4.27 (address@hidden) (gcc version 3.3.5 (Debian
1:3.3.5-8)) #2 SMP Fri Aug 12 15:27:40 EDT 2005
Sort version: sort (coreutils) 5.2.1
Input: same one

$ sort -t " " -k 1 T
20th Century Fox        /guid/9202a8c04000641f8000000000136722
20th Century Fox Animation      /guid/9202a8c04000641f8000000000923a5a
20th Century Fox Television     /guid/9202a8c04000641f8000000000d38838
Acer    /guid/9202a8c04000641f800000000021b67f
Acer Computer Australia /guid/9202a8c04000641f8000000000876087
Acer India      /guid/9202a8c04000641f8000000000875b5c
Acer Laboratories Incorporated  /guid/9202a8c04000641f8000000000c9f469
Acergy  /guid/9202a8c04000641f8000000000f082b3
Acerinox        /guid/9202a8c04000641f8000000000ddcbc9


As you can see, the results of experiment 1 and 2 are wrong, while that of
experiment 3 is what I expected.

-- 
Thanks,
Chen Jiusheng

T
Description: Binary data