Issues with mruby 3.2.0

Hi,

I've found an issue with mruby 3.2.0.

Given these two files:

entry.rb

$:.unshift '.'

require 'zip'

and zip.rb

a = [1,2,3]
b = [:a, :b, :c]

p a.zip(b)

I am getting the error:

trace (most recent call last):
        [10] (unknown):0
        [9] (unknown):0:in require
        [8] /home/sean/Syncthing/code/c++/taylor/zip.rb:4
        [7] /home/sean/Syncthing/code/c++/taylor/zip.rb:4:in zip
        [6] /home/sean/Syncthing/code/c++/taylor/zip.rb:4:in each
        [5] /home/sean/Syncthing/code/c++/taylor/zip.rb:4:in zip
        [4] /home/sean/Syncthing/code/c++/taylor/zip.rb:4:in each
        [3] /home/sean/Syncthing/code/c++/taylor/zip.rb:4:in zip
        [2] /home/sean/Syncthing/code/c++/taylor/zip.rb:4:in next
        [1] /home/sean/Syncthing/code/c++/taylor/zip.rb:4:in next_values
/home/sean/Syncthing/code/c++/taylor/zip.rb:4:in resume: can't cross C function boundary (FiberError)

It works as expected with mruby 3.1.0

Please let me know if you require any more information

Riproduci il report usando entry.rb e zip.rb con mruby 3.2.0, quindi confronta lo stesso caso su mruby 3.1.0. Analizza il percorso di require e FiberError esposto da Array#zip e determina cosa deve cambiare affinché l'esempio torni a funzionare su 3.2.0; il lavoro è completato quando il programma segnalato viene eseguito senza l'errore di limite.