Test failure (pma) with gawk-5.2.0 beta

[Sam James]

Hi!

Thanks for the new beta release.

I get the following segfault when running the gawk-5.2.0 beta (5.1.65) test 
suite:
```
Core was generated by `../gawk BEGIN { print ++i }'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000055a9583867f2 in in_array (s=0x2ad8c002e810, a=0x2ad8c0006978) at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/awk.h:1916
1916            ret = a->aexists(a, s);
(gdb) bt
#0  0x000055a9583867f2 in in_array (s=0x2ad8c002e810, a=0x2ad8c0006978) at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/awk.h:1916
#1  lookup (name=<optimized out>) at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/symbol.c:162
#2  0x000055a958375c06 in err (isfatal=isfatal@entry=false, 
s=s@entry=0x55a9583aa659 "", emsg=0x55a9583aa302 "fatal error: internal error", 
argp=argp@entry=0x7ffc4587fdd0)
    at /var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/msg.c:56
#3  0x000055a958376e51 in msg (mesg=<optimized out>) at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/msg.c:122
#4  0x000055a958376f3b in catchsig (sig=11) at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/main.c:1318
#5  <signal handler called>
#6  0x000055a9583867f2 in in_array (s=0x2ad8c002e7b8, a=0x2ad8c0006978) at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/awk.h:1916
#7  lookup (name=<optimized out>) at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/symbol.c:162
#8  0x000055a958318d6b in init_symbol_table () at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/symbol.c:114
#9  init_symbol_table () at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/symbol.c:75
#10 main (argc=2, argv=0x7ffc45880708) at 
/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/main.c:324
```

```
time
egrep: warning: egrep is obsolescent; using /bin/grep -E
make[3]: Leaving directory 
'/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/test'
make[3]: Entering directory 
'/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/test'
pma
make[3]: *** [Makefile:2215: pma] Segmentation fault (core dumped)
make[3]: Leaving directory 
'/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/test'
make[2]: *** [Makefile:2201: pma-tests] Error 2
make[2]: *** Waiting for unfinished jobs....
make[3]: Leaving directory 
'/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/test'
make[2]: Leaving directory 
'/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65/test'
make[1]: *** [Makefile:804: check-recursive] Error 1
make[1]: Leaving directory 
'/var/tmp/portage/sys-apps/gawk-5.1.65/work/gawk-5.1.65'
make: *** [Makefile:1103: check] Error 2
 * ERROR: sys-apps/gawk-5.1.65::gentoo failed (test phase):
 *   Make check failed. See above for details.
```

Let me know if more information is needed. Built w/ gcc 12.2.0.

Best,
sam

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