merge revision(s) 51651,51655: [Backport #11451]
* vm_insnhelper.c (vm_invoke_block): we should not expect ci->argc is stable after invoking a block. [Bug #11451] * test/ruby/test_yield.rb: add a test. This test script is given by Alex Dowad.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52717 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 51651,51655: [Backport #11451]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52717 b2dd03c8-39d4-4d8f-98ff-823fe69b080e