tests/cases/compiler/genericFunctionTypedArgumentsAreFixed.ts(2,14): error TS2339: Property 'length' does not exist on type 'number'.


==== tests/cases/compiler/genericFunctionTypedArgumentsAreFixed.ts (1 errors) ====
    declare function map<T, U>(f: (x: T) => U, xs: T[]): U[];
    map((a) => a.length, [1]);
                 ~~~~~~
!!! error TS2339: Property 'length' does not exist on type 'number'.