clean_and_compile.sh

#!/bin/sh

make clean
make distclean
rm -rf ./build

set -e

autoconf || exit 125
(./configure --prefix=`pwd`/build/ && make && make install) || exit 125

build/bin/ruby /tmp/inner_method_test.rb

inner_method_test.rb

def foo
  def bar
  end
end

foo

if Object.instance_methods(false).include?(:bar)
  puts "BAD. :bar is public"
  exit(1)
end

puts "GOOD. :bar is private"