bug#9780: sort -u throws out non-duplicates

[Bernhard Voelker]

On 08/16/2012 10:09 AM, Jim Meyering wrote:
>> FYI, here's the required test:
>> >
>> >   (yes 7|head -10; echo 1)|sed 's/^/1 /'|sort -k2,2 --p=1 -S32b -u
>> >
>> > Without the if (key) { ... } part of my patch, it would fail.
>> > I had to tweak the number of '7's (s/11/10) in the input to make
>> > it trigger.
> Hmm... The above is arch-specific.
> It triggers the bug on i686, but not on x86_64.

This triggers the bug on my x86_64:

  $ ~/cu> (yes 7|head -n 100; echo 1)|sed 's/^/1 /'| src/sort -k2,2 --p=1 -S1k 
-u
  1 7

However, a little different line does not:

  $ ~/cu> (yes 7|head -n 10; echo 1)|sed 's/^/1 /'| src/sort -k2,2 --p=1 -S1k -u
  1 1
  1 7

  $ ~/cu> (yes 7|head -n 100; echo 1)|sed 's/^/1 /'| src/sort -k2,2 --p=1 -S1M 
-u
  1 1
  1 7

Have a ncie day,
Berny