[ruby-cvs:62943] nagachika:r55779 (ruby_2_3): merge revision(s) 55605: [Backport #12565]

[nagachika at ruby-lang.org]

nagachika	2016-07-30 12:31:58 +0900 (Sat, 30 Jul 2016)

  New Revision: 55779

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=55779

  Log:
    merge revision(s) 55605: [Backport #12565]
    
    * vm_args.c (vm_caller_setup_arg_block): disable symbol block
      argument optimization when tail call optimization is enabled,
      in order to avoid SEGV.  [ruby-core:76288] [Bug #12565]

  Modified directories:
    branches/ruby_2_3/
  Modified files:
    branches/ruby_2_3/ChangeLog
    branches/ruby_2_3/test/ruby/test_optimization.rb
    branches/ruby_2_3/version.h
    branches/ruby_2_3/vm_args.c