eval_intern.h (TH_PUSH_TAG, TH_EXEC_TAG): refine stack overflow
detection. chain local tag after setjmp() successed on it, because
calling setjmp() also can overflow the stack. [ruby-dev:47804] [Bug #9109]
vm_eval.c (rb_catch_obj): now th->tag points previous tag until
TH_EXEC_TAG().
eval_intern.h: refine stack overflow detection
detection. chain local tag after setjmp() successed on it, because
calling setjmp() also can overflow the stack.
[ruby-dev:47804] [Bug #9109]
TH_EXEC_TAG().
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43707 b2dd03c8-39d4-4d8f-98ff-823fe69b080e