Ensure terminal gets released even in case of an exception

app/services/snapshot_creator.rb

@@ -4,10 +4,11 @@ class SnapshotCreator
     terminal = Terminal.new(width, height)
     seconds = (duration / 2).to_i
     bytes = stdout.bytes_until(seconds)
-    snapshot = terminal.feed(bytes)
-    terminal.release
 
-    snapshot
+    terminal.feed(bytes)
+
+  ensure
+    terminal.release
   end
 
 end