/**
 * An evaluation that could not produce a value. The message carries
 * the evaluator's own diagnostics (a traceback, a transport failure,
 * a non-serializable result); `syntax` is true when the program
 * failed to parse, so callers can distinguish "bad script" from
 * "script raised".
 */
export declare class EvalError extends Error {
    readonly syntax: boolean;
    constructor(message: string, options?: {
        syntax?: boolean;
        cause?: unknown;
    });
}
/**
 * A rename whose two ends do not live on the same mount.
 *
 * The dispatcher picks the mount from the source and addresses the
 * destination against that same backend, so applying one would drop
 * the source and write the target into the wrong store.
 *
 * Deliberately carries no errno. The condition is decided once, in
 * RuntimeVFS.rename, and each encoder maps it to the number its own
 * reference implementation answers: pathlib says EXDEV, while a WASI
 * guest sees ENOENT because each mount is its own preopen. Unifying
 * those two is a separate decision from writing the rule down once.
 */
export declare class CrossMountError extends Error {
    readonly src: string;
    readonly dst: string;
    readonly code = "CROSS_MOUNT";
    constructor(src: string, dst: string);
}
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