* vm_insnhelper.c (vm_callee_setup_arg_complex, vm_yield_setup_block_args):
  clear keyword arguments to prevent GC bug which occurs
  while marking VM stack.
  [ruby-dev:47729] [Bug #8964]

* test/ruby/test_keyword.rb: tests for the above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43081 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-09-29

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43082 b2dd03c8-39d4-4d8f-98ff-823fe69b080e