From: Kazuhiro NISHIYAMA <redmine@...>
Date: 2010-04-11T11:34:37+09:00
Subject: [ruby-dev:40953] [Bug #3126] irb/completionでTypeError

Bug #3126: irb/completionでTypeError
http://redmine.ruby-lang.org/issues/show/3126

起票者: Kazuhiro NISHIYAMA
ステータス: Open, 優先度: Normal
担当者: Keiju Ishitsuka, カテゴリ: lib, Target version: 1.9.2
ruby -v: ruby 1.9.2dev (2010-04-10 trunk 27284) [x86_64-linux]

irb/completion を読み込んでいると「a.」や「C::」などの後にタブキーを押すと
.../irb/completion.rb:137:in `quote': can't convert NilClass to String (TypeError)
や
.../irb/completion.rb:87:in `quote': can't convert NilClass to String (TypeError)
で終了してしまいます。

以下の修正で直るようです。

diff --git a/lib/irb/completion.rb b/lib/irb/completion.rb
index a345c23..e059bc4 100644
--- a/lib/irb/completion.rb
+++ b/lib/irb/completion.rb
@@ -81,10 +81,10 @@ module IRB
 	candidates.grep(/^#{receiver}/).collect{|e| "::" + e}
 
 #      when /^(((::)?[A-Z][^:.\(]*)+)::?([^:.]*)$/
-      when /^([A-Z].*)::([^:.]+)*$/
+      when /^([A-Z].*)::([^:.]*)$/
 	# Constant or class methods
 	receiver = $1
-	message = Regexp.quote($4)
+	message = Regexp.quote($2)
 	begin
 	  candidates = eval("#{receiver}.constants.collect{|m| m.to_s}", bind)
 	  candidates |= eval("#{receiver}.methods.collect{|m| m.to_s}", bind)
@@ -134,7 +134,7 @@ module IRB
       when /^([^."].*)\.([^.]*)$/
 	# variable
 	receiver = $1
-	message = Regexp.quote($3)
+	message = Regexp.quote($2)
 
 	gv = eval("global_variables", bind).collect{|m| m.to_s}
 	lv = eval("local_variables", bind).collect{|m| m.to_s}


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