fatal: internal error Ver 5.2.0 readall()

[J Naman]

# Sorry, I do not have a "gawkbug script"
in a nutshell: readall() gives me 'fatal: internal error: file interpret.h,
line 253: unexpected parameter type Node_val' as described below:

# TEST writeall()
# Gawk ver 5.2.0 (mingw) api3.2 GNU MP 6.1.2 GNU MPFR 4.0.2
@load "rwarray"
BEGIN{
split("",arr1); for(i in SYMTAB) { if(!isarray(SYMTAB[i])){
arr1[i]=SYMTAB[i];}}
ret = writeall("foo.binawk");
print ret " = writeall(\"foo.binawk\");"
exit;
}
# stdout: 1 = writeall("foo.binawk");
# TEST readall()
# Gawk ver 5.2.0 (mingw) api3.2 GNU MP 6.1.2 GNU MPFR 4.0.2
@load "rwarray"
BEGIN{
split("",arr1);
printf("arr1: len=%s\n",length(arr1))
ret = readall("foo.binawk");
print ret " = readall(\"foo.binawk\");"
#**> fatal: internal error: file interpret.h, line 253: unexpected
parameter type Node_val
printf("arr1: len=%s\n",length(arr1))
exit;
}
#===============
# stdout: arr1: len=0
# stdout: 1 = readall("foo.binawk");
# foo_readAll.awk:12: fatal: internal error: file interpret.h, line 253:
unexpected parameter type Node_val
 Note: granted one can use reada() and writea(), but when I got the error
with readall(), I cut out all variables until only the one array was left
that caused the error. Thanks, John