olaf@tack:~$ irb
irb(main):001:0> 'foo"bar"baz' =~ /\".*?\"/
=> 3
irb(main):002:0> 'foo"bar"baz' =~ /\"(.*?\)"/
SyntaxError: compile error
(irb):2: unmatched (: /\"(.*?\)"/
        from (irb):2
irb(main):003:0> 'foo"bar"baz' =~ /\"(.*?)\"/
=> 3
irb(main):004:0> /\"(.*?)\"/.class.instance_methods
=> ["send", "options", "object_id", "singleton_methods", "__send__", "equal?", "taint", "frozen?", "instance_variable_get", "kind_of?", "to_a", "method", "instance_eval", "kcode", "type", "protected_methods", "extend", "eql?", "display", "instance_variable_set", "~", "hash", "is_a?", "to_s", "match", "class", "tainted?", "private_methods", "untaint", "source", "id", "inspect", "==", "===", "clone", "public_methods", "respond_to?", "freeze", "__id__", "=~", "methods", "nil?", "dup", "instance_variables", "casefold?", "instance_of?"]
irb(main):005:0> /\"(.*?)\"/.match('foo"bar"baz')
=> #<MatchData:0x40309150>
irb(main):006:0> /\"(.*?)\"/.match('foo"bar"baz').to_a
=> ["\"bar\"", "bar"]
irb(main):007:0> /\"(.*?)\"/.match('foo"bar"baz')[1]
=> "bar"
/usr/lib/ruby/1.8/irb.rb:273: [BUG] Segmentation fault
ruby 1.8.2 (2005-04-11) [i386-linux]

Aborted (core dumped)
olaf@tack:~$