Benchmark swallows errors

[nflaig]

Trying to load a file that does not exist via readFileSync in beforeAll hook, there is no relevant error in the logs when benchmark fails, it just says

Error processing benchmark files. No benchmark result was produced
 ✖ Error: No benchmark result was produced
    at run (file:///home/nico/projects/ethereum/lodestar/node_modules/@chainsafe/benchmark/lib/esm/cli/run.js:49:19)
    at async Object.handler (file:///home/nico/projects/ethereum/lodestar/node_modules/@chainsafe/benchmark/lib/esm/cli/cli.js:24:9)

I found multiple cases where errors are swallowed, this is just one example

[nflaig]

another example from @wemeetagain

eg

import {describe, bench} from "@chainsafe/benchmark";
import * as p from "@lodestar/params";

describe("foo", () => {
  bench("bar", () => void 0);
});

will error, while

import {describe, bench} from "@chainsafe/benchmark";

describe("foo", () => {
  bench("bar", () => void 0);
});

will not