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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Destructuring an array into incompatible type no longer throws an error","articleBody":"\u003c!-- BUGS: Please use this template. --\u003e\r\n\u003c!-- QUESTIONS: This is not a general support forum! Ask Qs at http://stackoverflow.com/questions/tagged/typescript --\u003e\r\n\u003c!-- SUGGESTIONS: See https://github.com/Microsoft/TypeScript-wiki/blob/master/Writing-Good-Design-Proposals.md --\u003e\r\n\r\n**TypeScript Version:**  2.2.1 / 2.1.4\r\n\r\n**Code**\r\n\r\n```ts\r\nlet foo: Array\u003cnumber\u003e = [1, 2, 3, 4];\r\nlet bar: Array\u003cnumber\u003e = { ...foo };\r\n```\r\n\r\nWhen I try to compile with `tsc@2.1.4`, I get the following error:\r\n\r\n\u003e error TS2322: Type '{ [n: number]: number; length: number; }' is not assignable to type 'number[]'.\r\n\u003e Property 'push' is missing in type '{ [n: number]: number; length: number; }'.\r\n\r\nWith `tsc@2.2.1` I no longer get an error. This should not compile as `bar` is not of type `Array\u003cnumber\u003e`.\r\n","author":{"url":"https://github.com/saravanaj","@type":"Person","name":"saravanaj"},"datePublished":"2017-03-21T16:46:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/14768/TypeScript/issues/14768"}