Special block code for Enumerable is not quite 1.9 friendly
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                 Key: JRUBY-4013
                 URL: http://jira.codehaus.org/browse/JRUBY-4013
             Project: JRuby
          Issue Type: Bug
          Components: Core Classes/Modules, Ruby 1.9
    Affects Versions: JRuby 1.3.1
            Reporter: Thomas E Enebo


callEach with CallBlock is going through slightly different semantics than 1.8. 
 At least this is my guess.  We are failing a map and collect spec during a 1.9 
run:

{noformat}
Enumerable#map gathers initial args as elements when each yields multiple FAILED
Expected [[1, 2], [3, 4, 5], [6, 7, 8, 9]]
 to equal [1, 3, 6]
{noformat}

David had a patch which tried to fix this in Enumerable methods themselves, but 
it is more complex than that and needs some logic baked into block handling 
code itself.

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