[MacRuby-devel] [MacRuby] #403: rescue block executed if exception raised in previous iteration

25 Oct 2009

      #403: rescue block executed if exception raised in previous iteration
-------------------------------+--------------------------------------------
 Reporter:  pwilson@…          |       Owner:  lsansonetti@…        
     Type:  defect             |      Status:  new                  
 Priority:  major              |   Milestone:  MacRuby 0.5          
Component:  MacRuby            |    Keywords:                       
-------------------------------+--------------------------------------------
 If a begin/rescue block is inside an iterator and the block raises an
 exception on the first iteration but calls return on the second iteration,
 the return is ignored and the rescue block ran a second time.  Here is an
 example:

 {{{
 def main
     [1,2].each do |iter|

       puts "Starting iteration #{iter}"

       begin

         if iter == 1
             raise StandardError
         end
         puts "  Successful iteration #{iter}"
         return true

       rescue StandardError
         puts "  Failed iteration #{iter}"
         next
       end

     end

     return false
 end

 puts main
 }}}

 In Ruby 1.8.7, the main method returns true, but in the Oct 24 nightly
 build of MacRuby, it returns false with this output:

 {{{
 Starting iteration 1
   Failed iteration 1
 Starting iteration 2
   Successful iteration 2
   Failed iteration 2
 false
 }}}

 Note that on the second iteration, both the Successful and Failed log
 messages get printed.

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/403>
MacRuby <http://macruby.org/>