X_PROTO_CHAIN_INDEX

a plain object literal typed Record<…> is READ with a computed key that is not a string literal

TABLE[name] where name is data answers an Object.prototype member instead of undefined — useService('constructor') returned the Object function out of the one function whose job is throwing X_SERVICE_MISSING, and querySelectorAll('[constructor]') matched every element. Thirteen instances across four sweeps, six of them fixed before this rule existed and all of them back: the argument for a rule over a sweep. A string literal key and a null-prototype table are recognised rather than pinned

guard the read with Object.hasOwn(table, key) before indexing, or make the table a Map; a table that is deliberately prototype-free is built with Object.create(null) and stops being reported