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tests/cases/conformance/types/spread/objectSpreadIndexSignature.ts(6,1): error TS7053: Element implicitly has an 'any' type because expression of type '101' can't be used to index type '{ b: number; a: number; }'.
Property '101' does not exist on type '{ b: number; a: number; }'.
==== tests/cases/conformance/types/spread/objectSpreadIndexSignature.ts (1 errors) ====
declare let indexed1: { [n: string]: number; a: number; };
declare let indexed2: { [n: string]: boolean; c: boolean; };
declare let indexed3: { [n: string]: number };
let i = { ...indexed1, b: 11 };
// only indexed has indexer, so i[101]: any
i[101];
~~~~~~
!!! error TS7053: Element implicitly has an 'any' type because expression of type '101' can't be used to index type '{ b: number; a: number; }'.
!!! error TS7053: Property '101' does not exist on type '{ b: number; a: number; }'.
let ii = { ...indexed1, ...indexed2 };
// both have indexer, so i[1001]: number | boolean
ii[1001];
declare const b: boolean;
indexed3 = { ...b ? indexed3 : undefined };
declare var roindex: { readonly [x:string]: number };
var writable = { ...roindex };
writable.a = 0; // should be ok.
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