Bug? - GNU Awk 5.0.1, API: 2.0 (GNU MPFR 3.1.5, GNU MP 6.1.2)

[J Naman]

I read about Namespace and decided to print SYMTAB. It blew up with
"Assertion failed: n->type == Node_val, file awk.h, line 1942 This
application has requested the Runtime to terminate it in an unusual
way. Please contact the application's support team for more information." I
am running *Windows 7 x64*, GNU Awk 5.0.1, API: 2.0 (GNU MPFR 3.1.5, GNU MP
6.1.2). Problem code is:
function show_symbol_table(  count,i) {
    for (i in SYMTAB) {
      printf("%s ",i)
      if (isarray(SYMTAB[i])) { count++ }
    }
    printf("\nsymbol table contains %d names of which %d are
arrays\n\n",length(SYMTAB),count)
}
I did NOT use @namespace "anything" (yet), just vanilla gawk. Tried it with
i & count global, same blow up. This is not a huge bug, just FYI. And a
million thanks for all the time & effort everyone puts into keeping GAWK
alive and evolving. Thanks, John Naman (address@hidden, if you want to get
my attention, screen shots, etc.)
JohnN