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diff --git a/ChangeLog b/ChangeLog
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+Sat Jul  7 15:30:05 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* insnhelper.ci (vm_yield_setup_args), vm.c, insns.def: 
+	  fix to pass nil as block parameter to yielded block.
+	  [ruby-dev:31147]
+
+	* bootstraptest/test_block.rb: add a test for above.
+
 Fri Jul  6 19:55:10 2007  Keiju Ishitsuka  <keiju@ruby-lang.org>
 
 	* lib/irb.rb: typo. Thanks, Giles Bowkett.