COMMIT 1.9 falls back on to_enum+next for Enumerable#zip with non-coercible args.	http://github.com/rubyspec/rubyspec/commit/c38590a50cdda50ab28e90330a32182d1912e8ec

===================================================================
+++ 20110428T034034Z
@@ 62903 @@
 
  <n>)
 ConditionVariable#broadcast releases all threads waiting in line for this resource ERROR
+ThreadError: Thread#join: deadlock 0xf7c8e538 - mutual join(0xf7b69d08)
 /var/lib/chkbuild/tmp/build/ruby-1.8.6-o3/<buildtime>/rubyspec/library/conditionvariable/broadcast_spec.rb:55:in `join'
 /var/lib/chkbuild/tmp/build/ruby-1.8.6-o3/<buildtime>/rubyspec/library/conditionvariable/broadcast_spec.rb:55
 /var/lib/chkbuild/tmp/build/ruby-1.8.6-o3/<buildtime>/rubyspec/library/conditionvariable/broadcast_spec.rb:55:in `each'

===================================================================
--- 20110427T025634Z
@@ 62903 @@
 
  <n>)
 ConditionVariable#broadcast releases all threads waiting in line for this resource ERROR
-ThreadError: Thread#join: deadlock 0xf7cd8530 - mutual join(0xf7bb3d30)
 /var/lib/chkbuild/tmp/build/ruby-1.8.6-o3/<buildtime>/rubyspec/library/conditionvariable/broadcast_spec.rb:55:in `join'
 /var/lib/chkbuild/tmp/build/ruby-1.8.6-o3/<buildtime>/rubyspec/library/conditionvariable/broadcast_spec.rb:55
 /var/lib/chkbuild/tmp/build/ruby-1.8.6-o3/<buildtime>/rubyspec/library/conditionvariable/broadcast_spec.rb:55:in `each'