Crash with Fiddle

[ankane]

Hi, the following code produces a Heap corruption detected crash with TruffleRuby 24.2.0.

require "fiddle"

100.times do
  Fiddle::Pointer["a"*16]
end

It only seems to affect 16 byte strings.

[ankane]

Sorry for the noise, fixed this in Fiddle: ruby/fiddle#180