setTimeout defined in lib.dom.d.ts is not type safe

TypeScript Version: 3.5.2

Search Terms:
settimeout type safe
Code

// A *self-contained* demonstration of the problem follows...
// Test this by running `tsc` on the command-line, rather than through another build tool such as Gulp, Webpack, etc.
const f = (foo: number) => console.log(foo + 1);
setTimeout(f, 0, 'a');

Expected behavior:
It shall not pass thanks to the type error.
Actual behavior:
It passes.
Playground Link:
https://www.typescriptlang.org/play/#code/MYewdgzgLgBAZjAvDAFHEIBcMwFcC2ARgKYBOAlEgHwyiQgA2xAdAyAOZoYwDUMAjOQDcAKAjEoAFQCW+YiFxQ0AGhgAGVQHIAhoULBgAE0PFNWwpuFA
Related Issues:
emm, maybe not.

Inspecciona las declaraciones de setTimeout en lib.dom.d.ts y reproduce primero el ejemplo con tsc o con el TypeScript Playground enlazado. Se considera completado cuando se rechaza el argumento string adicional si el callback acepta un number, y las pruebas de declaraciones o una comprobación equivalente del compilador pasan.