mcp-data-vis vulnerable to denial of service via unsanitized `select` key lookup on `Object.prototype` with `precompile: true`
icu-minify's runtime formatter resolves select branches by looking up the runtime value as a plain property on a prototype-bearing object. When the value coerces to a key that exists on Object.prototype (e.g. toString, proto, constructor, hasOwnProperty, valueOf), the lookup returns a truthy value that short-circuits the ?? options.other fallback, and the downstream iterator crashes with TypeError: nodes is not iterable. Any consumer that forwards user input into a {arg, select, …