naruse	2014-03-01 20:07:15 +0900 (Sat, 01 Mar 2014)

  New Revision: 45230

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=45230

  Log:
    find_svn_log may return blank xml

  Modified files:
    trunk/tool/redmine-backporter.rb
Index: tool/redmine-backporter.rb
===================================================================
--- tool/redmine-backporter.rb	(revision 45229)
+++ tool/redmine-backporter.rb	(revision 45230)
@@ -314,8 +314,7 @@ eom https://github.com/ruby/ruby/blob/trunk/tool/redmine-backporter.rb#L314
     end
 
     log = find_svn_log("##@issue]")
-    if log
-      rev = log[/revision="(\d+)/, 1]
+    if log && /revision="(?<rev>\d+)/ =~ log
       str = log[/merge revision\(s\) ([^:]+)(?=:)/]
       str.insert(5, "d")
       str = "ruby_#{TARGET_VERSION.tr('.','_')} r#{rev} #{str}."

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