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

===================================================================
+++ 20110427T215620Z
@@ 7644 @@
 /var/lib/chkbuild/tmp/build/ruby-1.8-o3/<buildtime>/ruby/test/net/http/test_connection.rb:20:in `test_connection_refused_in_request'
 ---------------
 
+2717 tests, 1352394 assertions, 3 failures, 0 errors
 make: *** [test-all] Error 1
 exit 2
 failed(test-all)

===================================================================
--- 20110426T212201Z
@@ 7644 @@
 /var/lib/chkbuild/tmp/build/ruby-1.8-o3/<buildtime>/ruby/test/net/http/test_connection.rb:20:in `test_connection_refused_in_request'
 ---------------
 
-2717 tests, 1352398 assertions, 3 failures, 0 errors
 make: *** [test-all] Error 1
 exit 2
 failed(test-all)