// =============================================================================
// Copyright (c) 2026 Haixing Hu.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0.
// =============================================================================
//! Private storage for synchronous copy failure details.
use crateCopyFailureState;
use crateCopyStats;
use crateFsError;
use crateWriterRecovery;
/// Heap-owned error and writer storage behind the public failure.
pub