Ruby

ipsocket.c: sys_error

• ext/socket/ipsocket.c (init_inetsock_internal): preserve errno
  before other library calls and use rb_syserr_fail.
  [ruby-core:68531] [Bug #10975]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50404 b2dd03c8-39d4-4d8f-98ff-823fe69b080e