$SAFE >= 4.

* re.c (rb_reg_s_quote): quote whitespaces for /x cases.

* eval.c (rb_thread_cleanup): should not terminate main_thread by
  Fatal error.

* regex.c (is_in_list): need to not exclude NUL and NEWLINE.

* re.c (rb_reg_expr_str): wrong backslash escapement.

* re.c (rb_reg_expr_str): do not escape embedded space
  characters.

* eval.c (rb_thread_cleanup): current thread may be THREAD_STOPPED,
  for example when terminated from signal handler.

* re.c (rb_reg_expr_str): should treat backslash specially in
  escaping.

* bignum.c (rb_big_eq): check `y == x' if y is neither Fixnum,
  Bignum, nor Float.

* pack.c (pack_unpack): should treat 'U' in character unit, not in
  byte unit.

* marshal.c (w_uclass): should check based on rb_obj_class(), not
  CLASS_OF().

* io.c (io_write): check error if written data is less than
  specified size to detect EPIPE.

* eval.c (assign): ruby_verbose should be surrounded by RTEST().

* object.c (rb_str2cstr): ditto.

* parse.y (void_expr): ditto.

* parse.y (void_stmts): ditto.

* variable.c (rb_ivar_get): ditto.

* variable.c (rb_cvar_set): ditto.

* variable.c (rb_cvar_get): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_6@2419 b2dd03c8-39d4-4d8f-98ff-823fe69b080e