Attempts to demonstrate a potential issue with regular expressions between Ruby and RubyMotion

gistfile1.rb

# The following code attempts to demonstrate a potential issue with regular
# expressions between Ruby and RubyMotion.
#
# The expression is supposed to match the text before an end of block character (^)
# So
#
#     x = Class.new
# ^
#
# should only return the first line, while
#
#     header
# =
#
# should return both lines.
#
# Paste this code into a simple ruby file, and both tests should pass.
# Paste into the app_delegate of an OSX RM Application, and the first test fails.
#------------------------------------------------------------------------------

EOB_MARKER          = /^\^\s*?\n/
CODEBLOCK_MATCH_2   = /(?:(?!#{EOB_MARKER})^[ \t]*\S.*\n)*/

#------------------------------------------------------------------------------
def regex_match
  string    = "    x = Class.new\n^\n"
  matched   = CODEBLOCK_MATCH_2.match(string)
  correct   = "    x = Class.new\n"

  puts "\nTest 1 - Works in Ruby 1.9.3 and 2.0, fails in RM 3.6"
  puts "#------------------------------------------------------------------------------"
  puts "   string: #{string}"
  puts "  matched: #{matched[0]}"
  puts "should be: #{correct}"
  puts matched[0] == correct ? "SUCCESS" : "FAILED"

  string    = "    header\n=\n"
  matched   = CODEBLOCK_MATCH_2.match(string)
  correct   = "    header\n=\n"

  puts "\nTest 2 - Works in Ruby 1.9.3 and 2.0, works in RM 3.6"
  puts "#------------------------------------------------------------------------------"
  puts "   string: #{string}"
  puts "  matched: #{matched[0]}"
  puts "should be: #{correct}"
  puts matched[0] == correct ? "SUCCESS" : "FAILED"
end