Function _fail

src/forceUpdate.js:104–110

(code, detail)

// errno, a version delta, an entry name); it is redacted + truncated to
// ERROR_MAX by the reporter before it leaves the process.
function _fail(code, detail) {
  return Object.freeze({
    ok: false,
    code: String(code),
    detail: detail == null ? '' : String(detail),
  });
}

// Compact "CODE: message" rendering of a thrown error for the detail field.
function _errStr(e) {