Structural search timeouts

Created by: sqs

From @JoshuaKGoldberg:

I'm trying Mark's structured query for lang:JavaScript connect(..., {... pure: false, ...}) and exclusively getting search timeouts with zero results after ~10 seconds: https://sourcegraph.com/search?q=context:global+lang:JavaScript+connect%28...%2C+%7B...pure:+false...%7D%29&patternType=structural (and also for lang:TypeScript).

(This came up while investigating https://twitter.com/acemarke/status/1416585511565725696.)