* gc.c (gc_mark): enable GC stack checking.

* string.c (str_gsub): lock strings temporarily.  [ruby-dev:24687]

* ext/socket/socket.c (s_recvfrom): tmplock input buffer.
  [ruby-dev:24705]

* array.c (rb_ary_uniq_bang): do not push frozen string from hash
  table.  [ruby-dev:24695]

* array.c (rb_ary_and): ditto.

* array.c (rb_ary_or): ditto.

* ext/enumerator/enumerator.c (each_cons_i): pass copy of an
  internal consequent array.  [ruby-talk:118691]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@7196 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/irb/ruby-lex.rb

@@ -55,6 +55,9 @@ class RubyLex
     @skip_space = false
     @readed_auto_clean_up = false
     @exception_on_syntax_error = true
+    @prompt = nil
+    @here_header = nil
+    @lex_state = nil
   end
 
   attr_accessor :skip_space