sort utility goes berzerk (x86_64) -- output from gdb

[Houder]

L.S.,

Reference:

     https://cygwin.com/ml/cygwin/2017-11/msg00251.html

Second attempt ... as far as I can tell Cygwin causes a segment
violation in ntdll.dll ...

As written, I have stripped my system of all software, that I
easily remove ...

I executed 'sfc /scannow' from an elevated DOS prompt (x86_64).

Next I downloaded gdb, and debuginfo for coreutils and cygwin.

For both x86 and x86_64 ...

As mentioned, my system is Windows 7 (8 cores) ...

64-@@ uname -a
CYGWIN_NT-6.1 Seven 2.9.0(0.318/5/3) 2017-09-12 10:18 x86_64 Cygwin

@@ uname -a
CYGWIN_NT-6.1-WOW Seven 2.9.0(0.318/5/3) 2017-09-12 10:41 i686 Cygwin

Tests carried out (both on x86 and x86_64):

  1. sort tt | /usr/bin/less
  2. LC_COLLATE=C sort tt | /usr/bin/less
  3. trap '' PIPE; sort tt | /usr/bin/less

Attached:

a. gdb-out_x64.txt <==== FAILURE
b. gdb-out2_x64.txt
c. gdb-out3_x64.txt

d. gdb-out_x86.txt
e. gdb-out2_x86.txt
f. gdb-out3_x86.txt

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