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Malte UblandClaude Opus 5.5
b716775730
A Map or Set is a live collection: a record copy answers the members it copied
once and misses every later write, so `function freeId(seen: { has(k: string):
boolean })` called with a Map must answer through the Map.
The collection now carries identity into the record view, and the view is
registered as a collection view: it keeps checked identity without protocol
dispatch, because there is no stored member to read. Its method calls dispatch
on the collection at runtime (`scr_native_map_invoke`), and `size` reads the
collection's own member.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>