* eval_intern.h, vm.c, vm_eval.c, vm_insnhelper.c:
change throw mechanism (not save target ep, but save target cfp).
It fixes `unexpected break' bug that occurs when
TracePoint#binding is called.
[ruby-dev:48797] [Bug #10689]
* test/ruby/test_settracefunc.rb: add a test.
merge revision(s) 49266: [Backport #10689]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@49374 b2dd03c8-39d4-4d8f-98ff-823fe69b080e