bug#21755: new snapshot available: grep-2.21.82-fbc5

[Bruce Dubbs]

Paul Eggert wrote:
> Bruce Dubbs wrote:
> > I would think that the tests in grep should account for both pcre and
> > pcre2, at
> > least for a couple of years.
>
> Grep currently supports only PCRE.  I'd be surprised if it worked with
> PCRE2.
>
> My test was with PCRE 8.35 with Debian and Ubuntu patches (I'm
> up-to-date with Ubuntu 15.10 on x86-64).  Yours was with 8.37, I assume
> with no patches. Perhaps if I find the time I can try building PCRE 8.37
> on Ubuntu 15.10 and see whether it exhibits the bug, but to be honest I
> was hoping someone else could debug this.  Perhaps you can try it with
> 8.35 on linuxfromscratch?

Yes, I can do that.  The main Upstream repo doesn't have 8.35, but it 
was at sourceforge.  I installed that:

-rwxr-xr-x 1 root root 762440 Oct 25 17:43 /lib/libpcre.so.1.2.3

but the pcre-jitstack test still aborts with a segfault.  I could try 
with a smaller pcrejit.txt file if that would help.

OK, I think I have it.  I had a default ulimit:

stack size              (kbytes, -s) 8192

when I changed that to unlimited, the test passed.  More testing and 
ulimit -s 16000 fails but ulimit -s 32000 passes.

> I assume you're doing your test on x86-64?  (Sorry, don't recall.)

Yes:

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                12
On-line CPU(s) list:   0-11
Thread(s) per core:    2
Core(s) per socket:    6
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 63
Model name:            Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz

  -- Bruce