[1.9] SyntaxError when a block var shadows local var
----------------------------------------------------

                 Key: JRUBY-5016
                 URL: http://jira.codehaus.org/browse/JRUBY-5016
             Project: JRuby
          Issue Type: Bug
          Components: Parser
    Affects Versions: JRuby 1.6
         Environment: jruby 1.5.1 (ruby 1.9.2dev trunk 24787) (2010-06-06 
f3a3480) (OpenJDK
64-Bit Server VM 1.6.0_18) [amd64-java]
            Reporter: Hiroshi Nakamura
            Assignee: Thomas E Enebo


1.9 parser raises SyntaxError when the given block variable identifier
is defined in local scope.

% jruby --1.9 -ve 'a = nil; [].each {|;a|}'
jruby 1.5.1 (ruby 1.9.2dev trunk 24787) (2010-06-06 f3a3480) (OpenJDK
64-Bit Server VM 1.6.0_18) [amd64-java]
:1: -e:1: aidentifier a is not valid to get (SyntaxError)

This commit just removes is_local_id() check for new_bv.  Is this safe?
http://github.com/jruby/jruby/commit/4d753f84f6050c39c2439145f287011f1e0d1db5

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