git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@32915 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r32271 from trunk into ruby_1_9_2.¶
global_variables, local_variables, and instance_variables returns
Symbols from 1.9 and need to stringify before evaling it.
See #4931.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@32915 b2dd03c8-39d4-4d8f-98ff-823fe69b080e