Re: [bug-gawk] array corruption bug in stable branch

[Andrew J. Schorr]

Here's a simplified example. My current guess is that there's a memory
management problem when assigning to $0.

For the attached script, the master branch prints the following (correctly):

0 Transmit Delay is 1 sec, State DROther, Priority 3
1 Neighbor Count is 2, Adjacent neighbor count is 2

But using the gawk-4.1-stable branch, the output is:

0 Neighbor Count is 2, Adjacent neighbor count is 2
1 Neighbor Count is 2, Adjacent neighbor count is 2

Regards,
Andy

On Sun, Jan 22, 2017 at 05:37:16PM -0500, Andrew J. Schorr wrote:
> Hi,
> 
> I don't know why yet, but the attached script gives the wrong result
> in the stable branch. In the master branch, there is no output, which I
> believe to be correct. But in the gawk-4.1-stable branch, I see
> this output:
> 
> sh-4.2$ ./gawk_bug5.sh 
> <   Transmit Delay is 1 sec, State DROther, Priority 3
> >   Neighbor Count is 2, Adjacent neighbor count is 2
> 
> Something about that gensub statement is corrupting things. I will continue
> to troubleshoot. Any insights appreciated.
> 
> Regards,
> Andy

gawk_bug.sh
Description: Bourne shell script