lib/xcode/install.rb in xcode-install-2.6.5 vs lib/xcode/install.rb in xcode-install-2.6.6

@@ -606,10 +606,15 @@
     end
 
     def appname_version
       appname = @path.basename('.app').to_s
       version_string = appname.split('-').last
-      Gem::Version.new(version_string)
+      begin
+        Gem::Version.new(version_string)
+      rescue ArgumentError
+        puts 'Unable to determine Xcode version from path name, installed list may not correctly identify installed betas'
+        Gem::Version.new(nil)
+      end
     end
 
     def uuid
       @uuid ||= plist_entry(':DVTPlugInCompatibilityUUID')
     end