Literal unary minus bignum/fixnum boundary lack of symmetry
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                 Key: JRUBY-5062
                 URL: http://jira.codehaus.org/browse/JRUBY-5062
             Project: JRuby
          Issue Type: Bug
          Components: Parser
    Affects Versions: JRuby 1.5.2
            Reporter: Thomas E Enebo
            Assignee: Thomas E Enebo


The following script should alternate between being a Fixnum and a Bignum since 
the negated value will fit into a Fixnum when negative but need to be promoted 
to a Bignum for the positive value.  MRI also behaves this like, but with a 
lower value since we use a long for our Fixnums:

{noformat}
./bin/jruby -e 'p (9223372036854775808).class, (-9223372036854775808).class, 
(--9223372036854775808).class, (---9223372036854775808).class'
{noformat}

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