tests/cases/conformance/es6/destructuring/iterableArrayPattern29.ts(2,21): error TS2345: Argument of type '[string, boolean]' is not assignable to parameter of type '[string, number]'. Types of property '1' are incompatible. Type 'boolean' is not assignable to type 'number'. ==== tests/cases/conformance/es6/destructuring/iterableArrayPattern29.ts (1 errors) ==== function takeFirstTwoEntries(...[[k1, v1], [k2, v2]]: [string, number][]) { } takeFirstTwoEntries(...new Map([["", true], ["hello", true]])); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2345: Argument of type '[string, boolean]' is not assignable to parameter of type '[string, number]'. !!! error TS2345: Types of property '1' are incompatible. !!! error TS2345: Type 'boolean' is not assignable to type 'number'.