revert r31760 and r31761
seems that rb_bug_errno() is called in sigpipe() intentionally. https://gist.github.com/sorah/831169
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51390 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
revert r31760 and r31761
seems that rb_bug_errno() is called in sigpipe() intentionally.
https://gist.github.com/sorah/831169
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51390 b2dd03c8-39d4-4d8f-98ff-823fe69b080e