Don't chain method calls in #[derive(Debug)]

Closes #29540

src/libsyntax/ext/deriving/debug.rs

@@ -72,34 +72,40 @@ fn show_substructure(cx: &mut ExtCtxt, span: Span,
     let span = Span { expn_id: cx.backtrace(), .. span };
     let name = cx.expr_lit(span, ast::Lit_::LitStr(ident.name.as_str(),
                                                    ast::StrStyle::CookedStr));
-    let mut expr = substr.nonself_args[0].clone();
+    let builder = token::str_to_ident("builder");
+    let builder_expr = cx.expr_ident(span, builder.clone());
 
-    match *substr.fields {
+    let fmt = substr.nonself_args[0].clone();
+
+    let stmts = match *substr.fields {
         Struct(ref fields) | EnumMatching(_, _, ref fields) => {
-
+            let mut stmts = vec![];
             if fields.is_empty() || fields[0].name.is_none() {
                 // tuple struct/"normal" variant
-                expr = cx.expr_method_call(span,
-                                           expr,
-                                           token::str_to_ident("debug_tuple"),
-                                           vec![name]);
+                let expr = cx.expr_method_call(span,
+                                               fmt,
+                                               token::str_to_ident("debug_tuple"),
+                                               vec![name]);
+                stmts.push(cx.stmt_let(span, true, builder, expr));
 
                 for field in fields {
                     // Use double indirection to make sure this works for unsized types
                     let field = cx.expr_addr_of(field.span, field.self_.clone());
                     let field = cx.expr_addr_of(field.span, field);
 
-                    expr = cx.expr_method_call(span,
-                                               expr,
-                                               token::str_to_ident("field"),
-                                               vec![field]);
+                    let expr = cx.expr_method_call(span,
+                                                   builder_expr.clone(),
+                                                   token::str_to_ident("field"),
+                                                   vec![field]);
+                    stmts.push(cx.stmt_expr(expr));
                 }
             } else {
                 // normal struct/struct variant
-                expr = cx.expr_method_call(span,
-                                           expr,
-                                           token::str_to_ident("debug_struct"),
-                                           vec![name]);
+                let expr = cx.expr_method_call(span,
+                                               fmt,
+                                               token::str_to_ident("debug_struct"),
+                                               vec![name]);
+                stmts.push(cx.stmt_let(span, true, builder, expr));
 
                 for field in fields {
                     let name = cx.expr_lit(field.span, ast::Lit_::LitStr(
@@ -109,18 +115,23 @@ fn show_substructure(cx: &mut ExtCtxt, span: Span,
                     // Use double indirection to make sure this works for unsized types
                     let field = cx.expr_addr_of(field.span, field.self_.clone());
                     let field = cx.expr_addr_of(field.span, field);
-                    expr = cx.expr_method_call(span,
-                                               expr,
-                                               token::str_to_ident("field"),
-                                               vec![name, field]);
+                    let expr = cx.expr_method_call(span,
+                                                   builder_expr.clone(),
+                                                   token::str_to_ident("field"),
+                                                   vec![name, field]);
+                    stmts.push(cx.stmt_expr(expr));
                 }
             }
+            stmts
         }
         _ => unreachable!()
-    }
+    };
 
-    cx.expr_method_call(span,
-                        expr,
-                        token::str_to_ident("finish"),
-                        vec![])
+    let expr = cx.expr_method_call(span,
+                                   builder_expr,
+                                   token::str_to_ident("finish"),
+                                   vec![]);
+
+    let block = cx.block(span, stmts, Some(expr));
+    cx.expr_block(block)
 }

src/test/run-pass/issue-29540.rs

@@ -0,0 +1,501 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[derive(Debug)]
+pub struct Config {
+    pub name: String,
+    pub cluster: String,
+    pub debug_none: String,
+    pub debug_lockdep: String,
+    pub debug_context: String,
+    pub debug_crush: String,
+    pub debug_mds: String,
+    pub debug_mds_balancer: String,
+    pub debug_mds_locker: String,
+    pub debug_mds_log: String,
+    pub debug_mds_log_expire: String,
+    pub debug_mds_migrator: String,
+    pub debug_buffer: String,
+    pub debug_timer: String,
+    pub debug_filer: String,
+    pub debug_striper: String,
+    pub debug_objecter: String,
+    pub debug_rados: String,
+    pub debug_rbd: String,
+    pub debug_journaler: String,
+    pub debug_objectcacher: String,
+    pub debug_client: String,
+    pub debug_osd: String,
+    pub debug_optracker: String,
+    pub debug_objclass: String,
+    pub debug_filestore: String,
+    pub debug_keyvaluestore: String,
+    pub debug_journal: String,
+    pub debug_ms: String,
+    pub debug_mon: String,
+    pub debug_monc: String,
+    pub debug_paxos: String,
+    pub debug_tp: String,
+    pub debug_auth: String,
+    pub debug_crypto: String,
+    pub debug_finisher: String,
+    pub debug_heartbeatmap: String,
+    pub debug_perfcounter: String,
+    pub debug_rgw: String,
+    pub debug_civetweb: String,
+    pub debug_javaclient: String,
+    pub debug_asok: String,
+    pub debug_throttle: String,
+    pub host: String,
+    pub fsid: String,
+    pub public_addr: String,
+    pub cluster_addr: String,
+    pub public_network: String,
+    pub cluster_network: String,
+    pub num_client: String,
+    pub monmap: String,
+    pub mon_host: String,
+    pub lockdep: String,
+    pub run_dir: String,
+    pub admin_socket: String,
+    pub daemonize: String,
+    pub pid_file: String,
+    pub chdir: String,
+    pub max_open_files: String,
+    pub restapi_log_level: String,
+    pub restapi_base_url: String,
+    pub fatal_signal_handlers: String,
+    pub log_file: String,
+    pub log_max_new: String,
+    pub log_max_recent: String,
+    pub log_to_stderr: String,
+    pub err_to_stderr: String,
+    pub log_to_syslog: String,
+    pub err_to_syslog: String,
+    pub log_flush_on_exit: String,
+    pub log_stop_at_utilization: String,
+    pub clog_to_monitors: String,
+    pub clog_to_syslog: String,
+    pub clog_to_syslog_level: String,
+    pub clog_to_syslog_facility: String,
+    pub mon_cluster_log_to_syslog: String,
+    pub mon_cluster_log_to_syslog_level: String,
+    pub mon_cluster_log_to_syslog_facility: String,
+    pub mon_cluster_log_file: String,
+    pub mon_cluster_log_file_level: String,
+    pub key: String,
+    pub keyfile: String,
+    pub keyring: String,
+    pub heartbeat_interval: String,
+    pub heartbeat_file: String,
+    pub heartbeat_inject_failure: String,
+    pub perf: String,
+    pub ms_tcp_nodelay: String,
+    pub ms_tcp_rcvbuf: String,
+    pub ms_initial_backoff: String,
+    pub ms_max_backoff: String,
+    pub ms_nocrc: String,
+    pub ms_die_on_bad_msg: String,
+    pub ms_die_on_unhandled_msg: String,
+    pub ms_die_on_old_message: String,
+    pub ms_dispatch_throttle_bytes: String,
+    pub ms_bind_ipv6: String,
+    pub ms_bind_port_min: String,
+    pub ms_bind_port_max: String,
+    pub ms_rwthread_stack_bytes: String,
+    pub ms_tcp_read_timeout: String,
+    pub ms_pq_max_tokens_per_priority: String,
+    pub ms_pq_min_cost: String,
+    pub ms_inject_socket_failures: String,
+    pub ms_inject_delay_type: String,
+    pub ms_inject_delay_msg_type: String,
+    pub ms_inject_delay_max: String,
+    pub ms_inject_delay_probability: String,
+    pub ms_inject_internal_delays: String,
+    pub ms_dump_on_send: String,
+    pub inject_early_sigterm: String,
+    pub mon_data: String,
+    pub mon_initial_members: String,
+    pub mon_sync_fs_threshold: String,
+    pub mon_compact_on_start: String,
+    pub mon_compact_on_bootstrap: String,
+    pub mon_compact_on_trim: String,
+    pub mon_tick_interval: String,
+    pub mon_subscribe_interval: String,
+    pub mon_delta_reset_interval: String,
+    pub mon_osd_laggy_halflife: String,
+    pub mon_osd_laggy_weight: String,
+    pub mon_osd_adjust_heartbeat_grace: String,
+    pub mon_osd_adjust_down_out_interval: String,
+    pub mon_osd_auto_mark_in: String,
+    pub mon_osd_auto_mark_auto_out_in: String,
+    pub mon_osd_auto_mark_new_in: String,
+    pub mon_osd_down_out_interval: String,
+    pub mon_osd_down_out_subtree_limit: String,
+    pub mon_osd_min_up_ratio: String,
+    pub mon_osd_min_in_ratio: String,
+    pub mon_osd_max_op_age: String,
+    pub mon_osd_max_split_count: String,
+    pub mon_osd_allow_primary_temp: String,
+    pub mon_osd_allow_primary_affinity: String,
+    pub mon_stat_smooth_intervals: String,
+    pub mon_lease: String,
+    pub mon_lease_renew_interval: String,
+    pub mon_lease_ack_timeout: String,
+    pub mon_clock_drift_allowed: String,
+    pub mon_clock_drift_warn_backoff: String,
+    pub mon_timecheck_interval: String,
+    pub mon_accept_timeout: String,
+    pub mon_pg_create_interval: String,
+    pub mon_pg_stuck_threshold: String,
+    pub mon_pg_warn_min_per_osd: String,
+    pub mon_pg_warn_max_object_skew: String,
+    pub mon_pg_warn_min_objects: String,
+    pub mon_pg_warn_min_pool_objects: String,
+    pub mon_cache_target_full_warn_ratio: String,
+    pub mon_osd_full_ratio: String,
+    pub mon_osd_nearfull_ratio: String,
+    pub mon_globalid_prealloc: String,
+    pub mon_osd_report_timeout: String,
+    pub mon_force_standby_active: String,
+    pub mon_warn_on_old_mons: String,
+    pub mon_warn_on_legacy_crush_tunables: String,
+    pub mon_warn_on_osd_down_out_interval_zero: String,
+    pub mon_warn_on_cache_pools_without_hit_sets: String,
+    pub mon_min_osdmap_epochs: String,
+    pub mon_max_pgmap_epochs: String,
+    pub mon_max_log_epochs: String,
+    pub mon_max_mdsmap_epochs: String,
+    pub mon_max_osd: String,
+    pub mon_probe_timeout: String,
+    pub mon_slurp_timeout: String,
+    pub mon_slurp_bytes: String,
+    pub mon_client_bytes: String,
+    pub mon_daemon_bytes: String,
+    pub mon_max_log_entries_per_event: String,
+    pub mon_health_data_update_interval: String,
+    pub mon_data_avail_crit: String,
+    pub mon_data_avail_warn: String,
+    pub mon_config_key_max_entry_size: String,
+    pub mon_sync_timeout: String,
+    pub mon_sync_max_payload_size: String,
+    pub mon_sync_debug: String,
+    pub mon_sync_debug_leader: String,
+    pub mon_sync_debug_provider: String,
+    pub mon_sync_debug_provider_fallback: String,
+    pub mon_inject_sync_get_chunk_delay: String,
+    pub mon_osd_min_down_reporters: String,
+    pub mon_osd_min_down_reports: String,
+    pub mon_osd_force_trim_to: String,
+    pub mon_mds_force_trim_to: String,
+    pub mon_advanced_debug_mode: String,
+    pub mon_debug_dump_transactions: String,
+    pub mon_debug_dump_location: String,
+    pub mon_sync_provider_kill_at: String,
+    pub mon_sync_requester_kill_at: String,
+    pub mon_leveldb_write_buffer_size: String,
+    pub mon_leveldb_cache_size: String,
+    pub mon_leveldb_block_size: String,
+    pub mon_leveldb_bloom_size: String,
+    pub mon_leveldb_max_open_files: String,
+    pub mon_leveldb_compression: String,
+    pub mon_leveldb_paranoid: String,
+    pub mon_leveldb_log: String,
+    pub mon_leveldb_size_warn: String,
+    pub mon_force_quorum_join: String,
+    pub paxos_stash_full_interval: String,
+    pub paxos_max_join_drift: String,
+    pub paxos_propose_interval: String,
+    pub paxos_min_wait: String,
+    pub paxos_min: String,
+    pub paxos_trim_min: String,
+    pub paxos_trim_max: String,
+    pub paxos_service_trim_min: String,
+    pub paxos_service_trim_max: String,
+    pub paxos_kill_at: String,
+    pub clock_offset: String,
+    pub auth_cluster_required: String,
+    pub auth_service_required: String,
+    pub auth_client_required: String,
+    pub auth_supported: String,
+    pub cephx_require_signatures: String,
+    pub cephx_cluster_require_signatures: String,
+    pub cephx_service_require_signatures: String,
+    pub cephx_sign_messages: String,
+    pub auth_mon_ticket_ttl: String,
+    pub auth_service_ticket_ttl: String,
+    pub auth_debug: String,
+    pub mon_client_hunt_interval: String,
+    pub mon_client_ping_interval: String,
+    pub mon_client_ping_timeout: String,
+    pub mon_client_hunt_interval_backoff: String,
+    pub mon_client_hunt_interval_max_multiple: String,
+    pub mon_client_max_log_entries_per_message: String,
+    pub mon_max_pool_pg_num: String,
+    pub mon_pool_quota_warn_threshold: String,
+    pub mon_pool_quota_crit_threshold: String,
+    pub client_cache_size: String,
+    pub client_cache_mid: String,
+    pub client_use_random_mds: String,
+    pub client_mount_timeout: String,
+    pub client_tick_interval: String,
+    pub client_trace: String,
+    pub client_readahead_min: String,
+    pub client_readahead_max_bytes: String,
+    pub client_readahead_max_periods: String,
+    pub client_snapdir: String,
+    pub client_mountpoint: String,
+    pub client_notify_timeout: String,
+    pub osd_client_watch_timeout: String,
+    pub client_caps_release_delay: String,
+    pub client_oc: String,
+    pub client_oc_size: String,
+    pub client_oc_max_dirty: String,
+    pub client_oc_target_dirty: String,
+    pub client_oc_max_dirty_age: String,
+    pub client_oc_max_objects: String,
+    pub client_debug_force_sync_read: String,
+    pub client_debug_inject_tick_delay: String,
+    pub client_max_inline_size: String,
+    pub fuse_use_invalidate_cb: String,
+    pub fuse_allow_other: String,
+    pub fuse_default_permissions: String,
+    pub fuse_big_writes: String,
+    pub fuse_atomic_o_trunc: String,
+    pub fuse_debug: String,
+    pub fuse_multithreaded: String,
+    pub crush_location: String,
+    pub objecter_tick_interval: String,
+    pub objecter_timeout: String,
+    pub objecter_inflight_op_bytes: String,
+    pub objecter_inflight_ops: String,
+    pub journaler_allow_split_entries: String,
+    pub journaler_write_head_interval: String,
+    pub journaler_prefetch_periods: String,
+    pub journaler_prezero_periods: String,
+    pub journaler_batch_interval: String,
+    pub journaler_batch_max: String,
+    pub mds_data: String,
+    pub mds_max_file_size: String,
+    pub mds_cache_size: String,
+    pub mds_cache_mid: String,
+    pub mds_mem_max: String,
+    pub mds_dir_max_commit_size: String,
+    pub mds_decay_halflife: String,
+    pub mds_beacon_interval: String,
+    pub mds_beacon_grace: String,
+    pub mds_enforce_unique_name: String,
+    pub mds_blacklist_interval: String,
+    pub mds_session_timeout: String,
+    pub mds_freeze_tree_timeout: String,
+    pub mds_session_autoclose: String,
+    pub mds_reconnect_timeout: String,
+    pub mds_tick_interval: String,
+    pub mds_dirstat_min_interval: String,
+    pub mds_scatter_nudge_interval: String,
+    pub mds_client_prealloc_inos: String,
+    pub mds_early_reply: String,
+    pub mds_default_dir_hash: String,
+    pub mds_log: String,
+    pub mds_log_skip_corrupt_events: String,
+    pub mds_log_max_events: String,
+    pub mds_log_segment_size: String,
+    pub mds_log_max_segments: String,
+    pub mds_log_max_expiring: String,
+    pub mds_bal_sample_interval: String,
+    pub mds_bal_replicate_threshold: String,
+    pub mds_bal_unreplicate_threshold: String,
+    pub mds_bal_frag: String,
+    pub mds_bal_split_size: String,
+    pub mds_bal_split_rd: String,
+    pub mds_bal_split_wr: String,
+    pub mds_bal_split_bits: String,
+    pub mds_bal_merge_size: String,
+    pub mds_bal_merge_rd: String,
+    pub mds_bal_merge_wr: String,
+    pub mds_bal_interval: String,
+    pub mds_bal_fragment_interval: String,
+    pub mds_bal_idle_threshold: String,
+    pub mds_bal_max: String,
+    pub mds_bal_max_until: String,
+    pub mds_bal_mode: String,
+    pub mds_bal_min_rebalance: String,
+    pub mds_bal_min_start: String,
+    pub mds_bal_need_min: String,
+    pub mds_bal_need_max: String,
+    pub mds_bal_midchunk: String,
+    pub mds_bal_minchunk: String,
+    pub mds_bal_target_removal_min: String,
+    pub mds_bal_target_removal_max: String,
+    pub mds_replay_interval: String,
+    pub mds_shutdown_check: String,
+    pub mds_thrash_exports: String,
+    pub mds_thrash_fragments: String,
+    pub mds_dump_cache_on_map: String,
+    pub mds_dump_cache_after_rejoin: String,
+    pub mds_verify_scatter: String,
+    pub mds_debug_scatterstat: String,
+    pub mds_debug_frag: String,
+    pub mds_debug_auth_pins: String,
+    pub mds_debug_subtrees: String,
+    pub mds_kill_mdstable_at: String,
+    pub mds_kill_export_at: String,
+    pub mds_kill_import_at: String,
+    pub mds_kill_link_at: String,
+    pub mds_kill_rename_at: String,
+    pub mds_kill_openc_at: String,
+    pub mds_kill_journal_at: String,
+    pub mds_kill_journal_expire_at: String,
+    pub mds_kill_journal_replay_at: String,
+    pub mds_kill_create_at: String,
+    pub mds_open_remote_link_mode: String,
+    pub mds_inject_traceless_reply_probability: String,
+    pub mds_wipe_sessions: String,
+    pub mds_wipe_ino_prealloc: String,
+    pub mds_skip_ino: String,
+    pub max_mds: String,
+    pub mds_standby_for_name: String,
+    pub mds_standby_for_rank: String,
+    pub mds_standby_replay: String,
+    pub osd_compact_leveldb_on_mount: String,
+    pub osd_max_backfills: String,
+    pub osd_backfill_full_ratio: String,
+    pub osd_backfill_retry_interval: String,
+    pub osd_agent_max_ops: String,
+    pub osd_agent_min_evict_effort: String,
+    pub osd_agent_quantize_effort: String,
+    pub osd_agent_delay_time: String,
+    pub osd_agent_hist_halflife: String,
+    pub osd_agent_slop: String,
+    pub osd_uuid: String,
+    pub osd_data: String,
+    pub osd_journal: String,
+    pub osd_journal_size: String,
+    pub osd_max_write_size: String,
+    pub osd_max_pgls: String,
+    pub osd_client_message_size_cap: String,
+    pub osd_client_message_cap: String,
+    pub osd_pg_bits: String,
+    pub osd_pgp_bits: String,
+    pub osd_crush_chooseleaf_type: String,
+    pub osd_pool_default_crush_rule: String,
+    pub osd_pool_default_crush_replicated_ruleset: String,
+    pub osd_pool_erasure_code_stripe_width: String,
+    pub osd_pool_default_size: String,
+    pub osd_pool_default_min_size: String,
+    pub osd_pool_default_pg_num: String,
+    pub osd_pool_default_pgp_num: String,
+    pub osd_pool_default_erasure_code_directory: String,
+    pub osd_pool_default_erasure_code_profile: String,
+    pub osd_erasure_code_plugins: String,
+    pub osd_pool_default_flags: String,
+    pub osd_pool_default_flag_hashpspool: String,
+    pub osd_pool_default_hit_set_bloom_fpp: String,
+    pub osd_pool_default_cache_target_dirty_ratio: String,
+    pub osd_pool_default_cache_target_full_ratio: String,
+    pub osd_pool_default_cache_min_flush_age: String,
+    pub osd_pool_default_cache_min_evict_age: String,
+    pub osd_hit_set_min_size: String,
+    pub osd_hit_set_max_size: String,
+    pub osd_hit_set_namespace: String,
+    pub osd_tier_default_cache_mode: String,
+    pub osd_tier_default_cache_hit_set_count: String,
+    pub osd_tier_default_cache_hit_set_period: String,
+    pub osd_tier_default_cache_hit_set_type: String,
+    pub osd_map_dedup: String,
+    pub osd_map_max_advance: String,
+    pub osd_map_cache_size: String,
+    pub osd_map_message_max: String,
+    pub osd_map_share_max_epochs: String,
+    pub osd_op_threads: String,
+    pub osd_peering_wq_batch_size: String,
+    pub osd_op_pq_max_tokens_per_priority: String,
+    pub osd_op_pq_min_cost: String,
+    pub osd_disk_threads: String,
+    pub osd_disk_thread_ioprio_class: String,
+    pub osd_disk_thread_ioprio_priority: String,
+    pub osd_recovery_threads: String,
+    pub osd_recover_clone_overlap: String,
+    pub osd_recover_clone_overlap_limit: String,
+    pub osd_backfill_scan_min: String,
+    pub osd_backfill_scan_max: String,
+    pub osd_op_thread_timeout: String,
+    pub osd_recovery_thread_timeout: String,
+    pub osd_snap_trim_thread_timeout: String,
+    pub osd_snap_trim_sleep: String,
+    pub osd_scrub_thread_timeout: String,
+    pub osd_scrub_finalize_thread_timeout: String,
+    pub osd_scrub_invalid_stats: String,
+    pub osd_remove_thread_timeout: String,
+    pub osd_command_thread_timeout: String,
+    pub osd_age: String,
+    pub osd_age_time: String,
+    pub osd_heartbeat_addr: String,
+    pub osd_heartbeat_interval: String,
+    pub osd_heartbeat_grace: String,
+    pub osd_heartbeat_min_peers: String,
+    pub osd_pg_max_concurrent_snap_trims: String,
+    pub osd_heartbeat_min_healthy_ratio: String,
+    pub osd_mon_heartbeat_interval: String,
+    pub osd_mon_report_interval_max: String,
+    pub osd_mon_report_interval_min: String,
+    pub osd_pg_stat_report_interval_max: String,
+    pub osd_mon_ack_timeout: String,
+    pub osd_default_data_pool_replay_window: String,
+    pub osd_preserve_trimmed_log: String,
+    pub osd_auto_mark_unfound_lost: String,
+    pub osd_recovery_delay_start: String,
+    pub osd_recovery_max_active: String,
+    pub osd_recovery_max_single_start: String,
+    pub osd_recovery_max_chunk: String,
+    pub osd_copyfrom_max_chunk: String,
+    pub osd_push_per_object_cost: String,
+    pub osd_max_push_cost: String,
+    pub osd_max_push_objects: String,
+    pub osd_recovery_forget_lost_objects: String,
+    pub osd_max_scrubs: String,
+    pub osd_scrub_load_threshold: String,
+    pub osd_scrub_min_interval: String,
+    pub osd_scrub_max_interval: String,
+    pub osd_scrub_chunk_min: String,
+    pub osd_scrub_chunk_max: String,
+    pub osd_scrub_sleep: String,
+    pub osd_deep_scrub_interval: String,
+    pub osd_deep_scrub_stride: String,
+    pub osd_scan_list_ping_tp_interval: String,
+    pub osd_auto_weight: String,
+    pub osd_class_dir: String,
+    pub osd_open_classes_on_start: String,
+    pub osd_check_for_log_corruption: String,
+    pub osd_use_stale_snap: String,
+    pub osd_rollback_to_cluster_snap: String,
+    pub osd_default_notify_timeout: String,
+    pub osd_kill_backfill_at: String,
+    pub osd_pg_epoch_persisted_max_stale: String,
+    pub osd_min_pg_log_entries: String,
+    pub osd_max_pg_log_entries: String,
+    pub osd_op_complaint_time: String,
+    pub osd_command_max_records: String,
+    pub osd_op_log_threshold: String,
+    pub osd_verify_sparse_read_holes: String,
+    pub osd_debug_drop_ping_probability: String,
+    pub osd_debug_drop_ping_duration: String,
+    pub osd_debug_drop_pg_create_probability: String,
+    pub osd_debug_drop_pg_create_duration: String,
+    pub osd_debug_drop_op_probability: String,
+    pub osd_debug_op_order: String,
+    pub osd_debug_verify_snaps_on_info: String,
+    pub osd_debug_verify_stray_on_activate: String,
+    pub osd_debug_skip_full_check_in_backfill_reservation: String,
+    pub osd_debug_reject_backfill_probability: String,
+    pub osd_enable_op_tracker: String,
+}
+
+fn main() {}