Re: [bug-gawk] Segfault when using higher ascii range in regexp

[Andrew J. Schorr]

Hi,

On Sat, May 28, 2016 at 09:58:03PM +0200, Jaromir Obr wrote:
> steps to reproduce:
> 
> $ printf "a"|awk '/[\x80-\x81]/ {count++}; END {print count}'
> awk: cmd. line:1: fatal error: internal error: segfault
> Aborted (core dumped)
> 
> or simply:
> $ printf "a"|awk '/[\x7f-\x80]/'
> awk: cmd. line:1: fatal error: internal error: segfault
> Aborted (core dumped)

I believe this issue has already been fixed:

bash-4.2$ gawk --version | head -1
GNU Awk 4.1.3f, API: 1.1 (GNU MPFR 3.1.1, GNU MP 5.1.1)
bash-4.2$ printf "a" | ./gawk '/[\x7f-\x80]/'
bash-4.2$ 

Unfortunately, a new version with this fix has not yet been
released, and I cannot easily find the relevant patch.

For the time being, you could grab a development version from
the git repository:

https://www.gnu.org/software/gawk/manual/html_node/Accessing-The-Source.html

Something like (off the top of my head):
   git clone git://git.savannah.gnu.org/gawk.git gawk
   cd gawk
   git checkout gawk-4.1-stable
   ./bootstrap.sh && ./configure && make && make check && make install

Regards,
Andy