Ensure resetting signal trap and output_io

lib/cocoapods/user_interface.rb

@@ -373,11 +373,13 @@ module Pod
       # @yield Code block in which inputs to {#puts} and {#print} methods will be printed to the piper.
       #
       def with_pager
+        prev_handler = Signal.trap('INT', 'IGNORE')
         IO.popen((ENV['PAGER'] || 'less -R'), 'w') do |io|
-          Signal.trap('INT', 'IGNORE')
           UI.output_io = io
           yield
         end
+      ensure
+        Signal.trap('INT', prev_handler)
         UI.output_io = nil
       end