Function errorFromCause

packages/react/src/api/error-reporting.tsx:83–98

(cause: Cause.Cause<unknown>, context: FrontendErrorContext)

};

const errorFromCause = (cause: Cause.Cause<unknown>, context: FrontendErrorContext): Error => {
  // `prettyErrors` is the non-lossy conversion: it renders every reason —
  // failures AND defects — as a freshly built `Error` that keeps the original's
  // name, message and stack frames.
  const [rendered] = Cause.prettyErrors(cause);
  if (rendered === undefined) return errorFromValue(Cause.squash(cause), context);
  if (!hasText(rendered.message)) {
    // A tagged error declared without a `message` field renders with an empty
    // one — that is what produced `FrontendHandledError: No error message`.
    // The rendered Error is ours, built just above, so filling it in cannot
    // mutate a value a call site still holds, and assigning (rather than
    // rebuilding) keeps the captured stack frames intact.
    rendered.message = describeUnknown(Cause.squash(cause), context);
  }
  return withOriginalCause(rendered, cause);
};

export const toReportableError = (error: unknown, context: FrontendErrorContext): Error => {
  if (Cause.isCause(error)) return errorFromCause(error, context);