* vm_insnhelper.c (vm_push_frame): add CHECK_STACK_OVERFLOW.

  [ruby-dev:39592]

* eval.c (rb_longjmp): add 1 level backtrace for sysstack_error
  without calling any method to prevent further stack overflow.

* eval.c (make_exception): don't call #exception for
  sysstack_error to prevent stack overflow.

* proc.c (Init_Proc): don't freeze sysstack_error.

* eval.c (rb_longjmp): move reentrant check after exception
  preparation.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25680 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 0 insertions, 1 deletions

diff --git a/proc.c b/proc.c
index 468ca467be..daf8c673fe 100644
--- a/proc.c
+++ b/proc.c
@@ -2043,7 +2043,6 @@ Init_Proc(void)
     sysstack_error = rb_exc_new3(rb_eSysStackError,
 				 rb_obj_freeze(rb_str_new2("stack level too deep")));
     OBJ_TAINT(sysstack_error);
-    OBJ_FREEZE(sysstack_error);
 
     /* utility functions */
     rb_define_global_function("proc", rb_block_proc, 0);