/**
 * A printable description of any caught value. Never throws.
 *
 * An `Error` answers its `message`, falling back to its `name` when the
 * message is empty (`new RangeError()` → `"RangeError"`). Every other value is
 * stringified; a symbol, and anything whose stringification throws or is
 * refused, answers `"<unprintable thrown value>"`.
 *
 * @param err - The value from a `catch` clause or a rejection handler.
 * @returns the value's text, or `"<unprintable thrown value>"` when it cannot
 *   be described. Only a value that stringifies to empty (`""`, `[]`) answers
 *   an empty string.
 */
export declare function errorText(err: unknown): string;
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