POSIX_SIGNAL is defined.
* eval.c (error_print): errat array may be empty.
* eval.c (rb_eval_cmd): should not upgrade safe level unless
explicitly specified by argument newly added.
* signal.c (sig_trap): should not allow tainted trap closure.
* variable.c (rb_f_trace_var): should not allow trace_var on safe
level higher than 3.
* variable.c (rb_f_trace_var): should not allow tainted trace
closure.
* gc.c: do not use static stack until system stack overflows.
* eval.c (eval): should call Exception#exception instead of
calling rb_exc_new3() directly.
* error.c (exc_exception): set "mesg" directly to the clone. it
might be better to set mesg via some method for flexibility.
* variable.c (cvar_override_check): should print original module
name, if 'a' is T_ICLASS.
* parse.y (yylex): float '1_.0' should not be allowed.
* variable.c (var_getter): should care about var as Qfalse
(ruby-bugs#PR199).
* array.c (cmpint): <=> or block for {min,max} may return bignum.
* array.c (sort_1): use rb_compint.
* array.c (sort_2): ditto.
* enum.c (min_ii): ditto.
* enum.c (min_ii): ditto.
* enum.c (max_i): ditto.
* enum.c (max_ii): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1826 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
