Max Desiatov d75b185553 Add checks for metadata state (#375) ... * Add checks for metadata state Type metadata actually *is* mutable, is updated by the runtime, and we need to be careful when reading from it. * Add a precondition for type metadata state * Replace `precondition` with an `assert` * Add missing license headers		2021-02-01 10:02:49 +00:00
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main.swift	Add checks for metadata state (#375)	2021-02-01 10:02:49 +00:00