Infinite recursion until bug

[wooster0]

def method
  until method == 0
  end

  method
end

method

BUG: `!(method)` at eval:2:9 has no type (Exception)
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from main
  from __libc_start_main
  from _start
  from ???
Error: you've found a bug in the Crystal compiler. Please open an issue, including source code that will allow us to reproduce the bug: https://github.com/crystal-lang/crystal/issues

It's a bug related to until. It does not happen with while.

[asterite]

It does happen with while:

def method
  while !(method == 0)
  end

  method
end

method

(that's what until expands to)