bin/box.rb: Lesser Backtrace

bin/box.rb

@@ -8,19 +8,20 @@ rescue LoadError
 end
 require 'safebox'
 
-_ = nil
+_ = _e = nil
 Dir.mkdir 'logs' rescue Errno::EEXIST
 SBDB::Env.new 'logs', SBDB::CREATE | SBDB::Env::INIT_TRANSACTION do |logs|
-	db = logs['test', :type => SBDB::Btree, :flags => SBDB::CREATE]
+	db = logs[ 'test', :type => SBDB::Btree, :flags => SBDB::CREATE]
 	db = Safebox::Persistent.new db, db.cursor
 	$stdout.print "(0)$ "
 	STDIN.each_with_index do |line, i|
-		ret = Safebox.run line, Safebox::Box, db, _
+		ret = Safebox.run line, Class.new( Safebox::Box), db, _, _e
 		if :value == ret.first
 			_ = ret.last
 			$stdout.puts "=> #{ret.last.inspect}"
 		else
-			$stdout.puts ret.last.inspect, ret.last.backtrace.map( &"    %s".method( :%))
+			_e = ret.last
+			$stdout.puts ret.last.inspect, ret.last.backtrace[0..-4].map( &"\t%s".method( :%)), "\tSafebox:1:in `run'"
 		end
 		$stdout.print "(#{i+1})$ "
 	end

lib/safebox/box.rb

@@ -3,8 +3,12 @@ require 'safebox/safebox'
 class Safebox::Box
 	attr_reader :_, :db
 
-	def initialize db, _ = nil
+	def initialize db, _ = nil, _e
-		@_, @db = _, db
+		@_, @db, @_e = _, db, _e
+	end
+
+	def _!
+		@_e
 	end
 
 	def put key, val