[ruby-cvs:65553] nobu:r58381 (trunk): eval.c: copy before cause setup

[nobu at ruby-lang.org]

nobu	2017-04-17 11:41:00 +0900 (Mon, 17 Apr 2017)

  New Revision: 58381

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=58381

  Log:
    eval.c: copy before cause setup
    
    * eval.c (setup_exception): copy frozen exception before setting
      up a cause not only a backtrace.

  Modified files:
    trunk/eval.c
    trunk/test/ruby/test_exception.rb