29 lines
549 B
TypeScript
29 lines
549 B
TypeScript
// @strict: true
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declare let x: { a?: number, b: string };
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declare let y: { a: null, b: string };
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declare let z: { a: null } & { b: string };
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x = y; // Error
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x = z; // Error
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// Repro from #36604
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interface To {
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field?: number;
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anotherField: string;
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}
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type From = { field: null } & Omit<To, 'field'>;
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function foo(v: From) {
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let x: To;
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x = v; // Error
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x.field = v.field; // Error
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}
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// Repro from #38348
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const yy: number[] & [number, ...number[]] = [1];
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const xx: [number, ...number[]] = yy;
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