bin/rconf in rconf-0.8.15 vs bin/rconf in rconf-0.8.16

@@ -124,13 +124,17 @@
       rubies.each do |ruby|
         ruby =~ /(\s+| =>)([^ ]*)\s.*/
         ruby = Regexp.last_match(2)
         gemsets = Command.execute('rvm', ruby, 'exec', 'rvm', 'gemset', 'list').output.split("\n")
         i = gemsets.index { |gs| gs =~ /^gemsets for #{ruby} / }
-        gemsets = gemsets[i + 1..-1]
-        gemsets.each do |gs|
-          gs = gs.lstrip
-          callback.call(ruby, gs)
+        if i
+          gemsets = gemsets[i + 1..-1]
+          gemsets.each do |gs|
+            gs = gs.lstrip
+            callback.call(ruby, gs)
+          end
+        else
+          report_fatal 'Failed to retrieve installed gemsets'
         end
       end
     end
 
     # Update rconf for given rubies if required