Re: [bug-gawk] PROCINFO["identifiers"], a bug

[Andrew J. Schorr]

On Wed, Aug 29, 2018 at 12:17:16AM +0200, Petr Slansky wrote:
> I found this by an accident and I think it is a bug in gawk 4.1.3 and 4.1.4
> 
> $ gawk 'BEGIN {for (KEY in PROCINFO) print KEY, PROCINFO[KEY];}'
> group9 116
> ppid 22129
> pgrpid 2890
> api_major 1
> group10 1000
> api_minor 1
> group1 4
> gid 1000
> mpfr_version GNU MPFR 4.0.1
> group2 20
> egid 1000
> group3 24
> gawk: cmd. line:1: fatal: attempt to use array `PROCINFO["identifiers"]' in
> a scalar context

That looks correct to me, because PROCINFO["identifiers"] is an array. You need 
to recurse
into subarrays. Try this instead:

gawk 'function p(k, v,   i) {if (isarray(v)) {for (i in v) p(k "[" i "]", 
v[i])} else print k, v} BEGIN {for (k in PROCINFO) p(k, PROCINFO[k])}'

Take a look at the process_array example in the manual:
https://www.gnu.org/software/gawk/manual/html_node/Walking-Arrays.html

Regards,
Andy