merge revision(s) 58769,59710,59712: [Backport #13566]
Treat NULL reference case [Bug #13566] Fix C level backtrace on Darwin SEGV caused by invalid instruction call. skip unless PLATFORM is darwin.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@62810 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 58769,59710,59712: [Backport #13566]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@62810 b2dd03c8-39d4-4d8f-98ff-823fe69b080e