Bug -- Searching order:mpixels Alone

I tried to search order:mpixels (clicking on the link on the cheatsheet) and got taken to an error page instead of a timeout page. The output I see is:

Error
Unexpected error: ActiveRecord::StatementInvalid.

Details
ActiveRecord::StatementInvalid exception raised
app/logical/post_query_builder.rb:173:in 'PostQueryBuilder#paginated_posts'
app/logical/post_query.rb:86:in 'PostQuery#paginated_posts'
app/logical/post_sets/post.rb:109:in 'PostSets::Post#posts'
app/controllers/posts_controller.rb:21:in 'PostsController#index'
app/logical/rack_server_timing.rb:19:in 'RackServerTiming#call'

Searching for order:mpixels_asc also returns this error.

Try restricting by year or post ID. For example, order:mpixels age:<1y or order:mpixels id:>8000000.