merge revision(s) 45576: [Backport #11572]
* string.c (sym_to_proc), proc.c (rb_block_clear_env_self): clear caller's self which is useless, so that it can get collected. [Fixes GH-592]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@52362 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 45576: [Backport #11572]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@52362 b2dd03c8-39d4-4d8f-98ff-823fe69b080e