* ext/pty/lib/expect.rb: raise an error when argument is unexpected

type.  based on a patch from Luiz Angelo Daros de Luca in
  [ruby-core:23464].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27276 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Fri Apr  9 23:58:58 2010  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* ext/pty/lib/expect.rb: raise an error when argument is unexpected
+	  type.  based on a patch from Luiz Angelo Daros de Luca in
+	  [ruby-core:23464].
+
 Fri Apr  9 23:57:35 2010  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* ext/pty/lib/expect.rb: add rdoc.  based on a patch from Luiz Angelo

ext/pty/lib/expect.rb

@@ -14,6 +14,8 @@ class IO
       e_pat = Regexp.new(Regexp.quote(pat))
     when Regexp
       e_pat = pat
+    else
+      raise TypeError, "unsupported pattern class: #{pattern.class}"
     end
     while true
       if !IO.select([self],nil,nil,timeout) or eof? then