[INFO] fetching crate cdns-rs 0.2.2...
[INFO] checking cdns-rs-0.2.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate cdns-rs 0.2.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate cdns-rs 0.2.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cdns-rs 0.2.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate cdns-rs 0.2.2
[INFO] tweaked toml for crates.io crate cdns-rs 0.2.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate cdns-rs 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-test v0.4.2
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[INFO] [stderr]   Downloaded libc v0.2.112
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c81067acd79aa1e6f2c2d082eafdbf6fff1f59f867415c3ebf8e6519d5f07dbf
[INFO] running `Command { std: "docker" "start" "-a" "c81067acd79aa1e6f2c2d082eafdbf6fff1f59f867415c3ebf8e6519d5f07dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c81067acd79aa1e6f2c2d082eafdbf6fff1f59f867415c3ebf8e6519d5f07dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c81067acd79aa1e6f2c2d082eafdbf6fff1f59f867415c3ebf8e6519d5f07dbf", kill_on_drop: false }`
[INFO] [stdout] c81067acd79aa1e6f2c2d082eafdbf6fff1f59f867415c3ebf8e6519d5f07dbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb54f64838231b1a207e901e703ef336d8cdf31809be4be0b24569e119805449
[INFO] running `Command { std: "docker" "start" "-a" "cb54f64838231b1a207e901e703ef336d8cdf31809be4be0b24569e119805449", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling async-trait v0.1.52
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.2
[INFO] [stderr]    Compiling async-recursion v0.3.2
[INFO] [stderr]     Checking tokio v1.15.0
[INFO] [stderr]     Checking async-stream v0.3.2
[INFO] [stderr]     Checking tokio-byteorder v0.3.0
[INFO] [stderr]     Checking tokio-stream v0.1.8
[INFO] [stderr]     Checking cdns-rs v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tokio-test v0.4.2
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/sync/network.rs:13:26
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::io::{ErrorKind, Write};
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 14 | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `Write` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/sync/query.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:304:33
[INFO] [stdout]     |
[INFO] [stdout] 304 | ...                   /// primary name server
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 305 | ...                   pnm: name2str(pkt, None)?, 
[INFO] [stdout]     |                       ------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:306:33
[INFO] [stdout]     |
[INFO] [stdout] 306 | ...                   /// responsible authority mailbox
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 307 | ...                   ram: name2str(pkt, None)?,
[INFO] [stdout]     |                       ------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:308:33
[INFO] [stdout]     |
[INFO] [stdout] 308 | ...                   /// serial number
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 309 | ...                   serial: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:310:33
[INFO] [stdout]     |
[INFO] [stdout] 310 | ...                   /// refresh interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 311 | ...                   interv_refr: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       --------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:312:33
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   /// retry interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 313 | ...                   interv_retry: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:314:33
[INFO] [stdout]     |
[INFO] [stdout] 314 | ...                   /// expire limit
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 315 | ...                   expire_limit: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:316:33
[INFO] [stdout]     |
[INFO] [stdout] 316 | ...                   /// minimum TTL
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | ...                   min_ttl: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ----------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::atomic::AtomicUsize`
[INFO] [stdout]   --> src/sync/cfg_parsers.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::{io::Read, sync::atomic::AtomicUsize};
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::Mutex`
[INFO] [stdout]   --> src/a_sync/cfg_parsers.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use tokio::sync::Mutex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ROUND_ROBIN_CNT`, `ResolveConfEntry`, `RoundRobinIterator`
[INFO] [stdout]   --> src/a_sync/cfg_resolv_parser.rs:19:60
[INFO] [stdout]    |
[INFO] [stdout] 19 | use crate::cfg_resolv_parser::{ResolveConfig, OptionFlags, ResolveConfEntry, RoundRobinIterator, ROUND_ROBIN_CNT};
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:312:33
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   /// primary name server
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 313 | ...                   pnm: name2str(pkt, None).await?, 
[INFO] [stdout]     |                       ------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:314:33
[INFO] [stdout]     |
[INFO] [stdout] 314 | ...                   /// responsible authority mailbox
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 315 | ...                   ram: name2str(pkt, None).await?,
[INFO] [stdout]     |                       ------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:316:33
[INFO] [stdout]     |
[INFO] [stdout] 316 | ...                   /// serial number
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | ...                   serial: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:318:33
[INFO] [stdout]     |
[INFO] [stdout] 318 | ...                   /// refresh interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 319 | ...                   interv_refr: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------ rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:320:33
[INFO] [stdout]     |
[INFO] [stdout] 320 | ...                   /// retry interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 321 | ...                   interv_retry: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:322:33
[INFO] [stdout]     |
[INFO] [stdout] 322 | ...                   /// expire limit
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 323 | ...                   expire_limit: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:324:33
[INFO] [stdout]     |
[INFO] [stdout] 324 | ...                   /// minimum TTL
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 325 | ...                   min_ttl: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       -------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/a_sync/query.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::convert::{TryFrom};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::Mutex`
[INFO] [stdout]   --> src/a_sync/network.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use tokio::sync::Mutex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::Arc`
[INFO] [stdout]   --> src/a_sync/query_async_taps.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::{sync::Arc};
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SocketTap`
[INFO] [stdout]   --> src/a_sync/query_async_taps.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 13 | use super::{network::{SocketTap, NetworkTapType}, common::DnsRequestHeader};
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/query.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/query.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                             ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `internal_error`
[INFO] [stdout]   --> src/tokenizer.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 | use crate::{internal_error, internal_error_map, error::*};
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `internal_error_map` is imported redundantly
[INFO] [stdout]    --> src/tokenizer.rs:16:29
[INFO] [stdout]     |
[INFO] [stdout] 16  |   use crate::{internal_error, internal_error_map, error::*};
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/error.rs:175:1
[INFO] [stdout]     |
[INFO] [stdout] 175 | / macro_rules! internal_error_map
[INFO] [stdout] 176 | | {
[INFO] [stdout] 177 | |     ($src:expr,$($arg:tt)*) => (
[INFO] [stdout] 178 | |         $crate::CDnsError::new($src, format!($($arg)*))
[INFO] [stdout] 179 | |     )
[INFO] [stdout] 180 | | }
[INFO] [stdout]     | |_- the item `internal_error_map` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/sync/network.rs:13:26
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::io::{ErrorKind, Write};
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 14 | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `Write` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/sync/query.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:304:33
[INFO] [stdout]     |
[INFO] [stdout] 304 | ...                   /// primary name server
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 305 | ...                   pnm: name2str(pkt, None)?, 
[INFO] [stdout]     |                       ------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:306:33
[INFO] [stdout]     |
[INFO] [stdout] 306 | ...                   /// responsible authority mailbox
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 307 | ...                   ram: name2str(pkt, None)?,
[INFO] [stdout]     |                       ------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:308:33
[INFO] [stdout]     |
[INFO] [stdout] 308 | ...                   /// serial number
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 309 | ...                   serial: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:310:33
[INFO] [stdout]     |
[INFO] [stdout] 310 | ...                   /// refresh interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 311 | ...                   interv_refr: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       --------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:312:33
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   /// retry interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 313 | ...                   interv_retry: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:314:33
[INFO] [stdout]     |
[INFO] [stdout] 314 | ...                   /// expire limit
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 315 | ...                   expire_limit: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:316:33
[INFO] [stdout]     |
[INFO] [stdout] 316 | ...                   /// minimum TTL
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | ...                   min_ttl: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ----------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::atomic::AtomicUsize`
[INFO] [stdout]   --> src/sync/cfg_parsers.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::{io::Read, sync::atomic::AtomicUsize};
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::Mutex`
[INFO] [stdout]   --> src/a_sync/cfg_parsers.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use tokio::sync::Mutex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ROUND_ROBIN_CNT`, `ResolveConfEntry`, `RoundRobinIterator`
[INFO] [stdout]   --> src/a_sync/cfg_resolv_parser.rs:19:60
[INFO] [stdout]    |
[INFO] [stdout] 19 | use crate::cfg_resolv_parser::{ResolveConfig, OptionFlags, ResolveConfEntry, RoundRobinIterator, ROUND_ROBIN_CNT};
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:312:33
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   /// primary name server
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 313 | ...                   pnm: name2str(pkt, None).await?, 
[INFO] [stdout]     |                       ------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:314:33
[INFO] [stdout]     |
[INFO] [stdout] 314 | ...                   /// responsible authority mailbox
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 315 | ...                   ram: name2str(pkt, None).await?,
[INFO] [stdout]     |                       ------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:316:33
[INFO] [stdout]     |
[INFO] [stdout] 316 | ...                   /// serial number
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | ...                   serial: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:318:33
[INFO] [stdout]     |
[INFO] [stdout] 318 | ...                   /// refresh interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 319 | ...                   interv_refr: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------ rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:320:33
[INFO] [stdout]     |
[INFO] [stdout] 320 | ...                   /// retry interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 321 | ...                   interv_retry: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:322:33
[INFO] [stdout]     |
[INFO] [stdout] 322 | ...                   /// expire limit
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 323 | ...                   expire_limit: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:324:33
[INFO] [stdout]     |
[INFO] [stdout] 324 | ...                   /// minimum TTL
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 325 | ...                   min_ttl: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       -------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/a_sync/query.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::convert::{TryFrom};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::Mutex`
[INFO] [stdout]   --> src/a_sync/network.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use tokio::sync::Mutex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::Arc`
[INFO] [stdout]   --> src/a_sync/query_async_taps.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::{sync::Arc};
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SocketTap`
[INFO] [stdout]   --> src/a_sync/query_async_taps.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 13 | use super::{network::{SocketTap, NetworkTapType}, common::DnsRequestHeader};
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/query.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/query.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                             ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `internal_error`
[INFO] [stdout]   --> src/tokenizer.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 | use crate::{internal_error, internal_error_map, error::*};
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `internal_error_map` is imported redundantly
[INFO] [stdout]    --> src/tokenizer.rs:16:29
[INFO] [stdout]     |
[INFO] [stdout] 16  |   use crate::{internal_error, internal_error_map, error::*};
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/error.rs:175:1
[INFO] [stdout]     |
[INFO] [stdout] 175 | / macro_rules! internal_error_map
[INFO] [stdout] 176 | | {
[INFO] [stdout] 177 | |     ($src:expr,$($arg:tt)*) => (
[INFO] [stdout] 178 | |         $crate::CDnsError::new($src, format!($($arg)*))
[INFO] [stdout] 179 | |     )
[INFO] [stdout] 180 | | }
[INFO] [stdout]     | |_- the item `internal_error_map` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/a_sync/caches.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<'cache> CacheTime<'cache>
[INFO] [stdout]    | ------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn new(path: &'cache Path) -> CDnsResult<CacheTime<'cache>>
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/a_sync/caches.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 110 | impl<T: Default + ConfigParser<T> + CacheOperations> CacheInstance<T>
[INFO] [stdout]     | --------------------------------------------------------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 113 |     fn new() -> CDnsResult<Self>
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `foresee_char` is never used
[INFO] [stdout]   --> src/tokenizer.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl<'token> ConfTokenizer<'token>
[INFO] [stdout]    | ---------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn foresee_char(&mut self) -> Option<char>
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/sync/query.rs:809:25
[INFO] [stdout]     |
[INFO] [stdout] 809 |                         drop(req);
[INFO] [stdout]     |                         ^^^^^---^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&common::DnsRequestHeader`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/a_sync/caches.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<'cache> CacheTime<'cache>
[INFO] [stdout]    | ------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn new(path: &'cache Path) -> CDnsResult<CacheTime<'cache>>
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/a_sync/caches.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 110 | impl<T: Default + ConfigParser<T> + CacheOperations> CacheInstance<T>
[INFO] [stdout]     | --------------------------------------------------------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 113 |     fn new() -> CDnsResult<Self>
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `foresee_char` is never used
[INFO] [stdout]   --> src/tokenizer.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl<'token> ConfTokenizer<'token>
[INFO] [stdout]    | ---------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn foresee_char(&mut self) -> Option<char>
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/sync/query.rs:809:25
[INFO] [stdout]     |
[INFO] [stdout] 809 |                         drop(req);
[INFO] [stdout]     |                         ^^^^^---^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&common::DnsRequestHeader`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.53s
[INFO] running `Command { std: "docker" "inspect" "cb54f64838231b1a207e901e703ef336d8cdf31809be4be0b24569e119805449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb54f64838231b1a207e901e703ef336d8cdf31809be4be0b24569e119805449", kill_on_drop: false }`
[INFO] [stdout] cb54f64838231b1a207e901e703ef336d8cdf31809be4be0b24569e119805449
[INFO] checking cdns-rs-0.2.2 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate cdns-rs 0.2.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate cdns-rs 0.2.2 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cdns-rs 0.2.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate cdns-rs 0.2.2
[INFO] tweaked toml for crates.io crate cdns-rs 0.2.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate cdns-rs 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27db66f2d89bfe9fa120496b7746262a877de0d9376fa9da3a0c4ad28cc9ecfe
[INFO] running `Command { std: "docker" "start" "-a" "27db66f2d89bfe9fa120496b7746262a877de0d9376fa9da3a0c4ad28cc9ecfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27db66f2d89bfe9fa120496b7746262a877de0d9376fa9da3a0c4ad28cc9ecfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27db66f2d89bfe9fa120496b7746262a877de0d9376fa9da3a0c4ad28cc9ecfe", kill_on_drop: false }`
[INFO] [stdout] 27db66f2d89bfe9fa120496b7746262a877de0d9376fa9da3a0c4ad28cc9ecfe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41e88ddac2c4c69a6c5c35da69a3668c42b93503c032b53c24ee333dcd4cef0d
[INFO] running `Command { std: "docker" "start" "-a" "41e88ddac2c4c69a6c5c35da69a3668c42b93503c032b53c24ee333dcd4cef0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling async-trait v0.1.52
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.2
[INFO] [stderr]    Compiling async-recursion v0.3.2
[INFO] [stderr]     Checking async-stream v0.3.2
[INFO] [stderr]     Checking tokio v1.15.0
[INFO] [stderr]     Checking tokio-byteorder v0.3.0
[INFO] [stderr]     Checking tokio-stream v0.1.8
[INFO] [stderr]     Checking cdns-rs v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tokio-test v0.4.2
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/sync/network.rs:13:26
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::io::{ErrorKind, Write};
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 14 | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `Write` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/sync/query.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:304:33
[INFO] [stdout]     |
[INFO] [stdout] 304 | ...                   /// primary name server
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 305 | ...                   pnm: name2str(pkt, None)?, 
[INFO] [stdout]     |                       ------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:306:33
[INFO] [stdout]     |
[INFO] [stdout] 306 | ...                   /// responsible authority mailbox
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 307 | ...                   ram: name2str(pkt, None)?,
[INFO] [stdout]     |                       ------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:308:33
[INFO] [stdout]     |
[INFO] [stdout] 308 | ...                   /// serial number
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 309 | ...                   serial: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:310:33
[INFO] [stdout]     |
[INFO] [stdout] 310 | ...                   /// refresh interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 311 | ...                   interv_refr: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       --------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:312:33
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   /// retry interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 313 | ...                   interv_retry: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:314:33
[INFO] [stdout]     |
[INFO] [stdout] 314 | ...                   /// expire limit
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 315 | ...                   expire_limit: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:316:33
[INFO] [stdout]     |
[INFO] [stdout] 316 | ...                   /// minimum TTL
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | ...                   min_ttl: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ----------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::atomic::AtomicUsize`
[INFO] [stdout]   --> src/sync/cfg_parsers.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::{io::Read, sync::atomic::AtomicUsize};
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::Mutex`
[INFO] [stdout]   --> src/a_sync/cfg_parsers.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use tokio::sync::Mutex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ROUND_ROBIN_CNT`, `ResolveConfEntry`, `RoundRobinIterator`
[INFO] [stdout]   --> src/a_sync/cfg_resolv_parser.rs:19:60
[INFO] [stdout]    |
[INFO] [stdout] 19 | use crate::cfg_resolv_parser::{ResolveConfig, OptionFlags, ResolveConfEntry, RoundRobinIterator, ROUND_ROBIN_CNT};
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:312:33
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   /// primary name server
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 313 | ...                   pnm: name2str(pkt, None).await?, 
[INFO] [stdout]     |                       ------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:314:33
[INFO] [stdout]     |
[INFO] [stdout] 314 | ...                   /// responsible authority mailbox
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 315 | ...                   ram: name2str(pkt, None).await?,
[INFO] [stdout]     |                       ------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:316:33
[INFO] [stdout]     |
[INFO] [stdout] 316 | ...                   /// serial number
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | ...                   serial: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:318:33
[INFO] [stdout]     |
[INFO] [stdout] 318 | ...                   /// refresh interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 319 | ...                   interv_refr: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------ rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:320:33
[INFO] [stdout]     |
[INFO] [stdout] 320 | ...                   /// retry interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 321 | ...                   interv_retry: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:322:33
[INFO] [stdout]     |
[INFO] [stdout] 322 | ...                   /// expire limit
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 323 | ...                   expire_limit: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:324:33
[INFO] [stdout]     |
[INFO] [stdout] 324 | ...                   /// minimum TTL
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 325 | ...                   min_ttl: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       -------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/a_sync/query.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::convert::{TryFrom};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::Mutex`
[INFO] [stdout]   --> src/a_sync/network.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use tokio::sync::Mutex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::Arc`
[INFO] [stdout]   --> src/a_sync/query_async_taps.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::{sync::Arc};
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SocketTap`
[INFO] [stdout]   --> src/a_sync/query_async_taps.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 13 | use super::{network::{SocketTap, NetworkTapType}, common::DnsRequestHeader};
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/query.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/query.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                             ^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `internal_error`
[INFO] [stdout]   --> src/tokenizer.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 | use crate::{internal_error, internal_error_map, error::*};
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `internal_error_map` is imported redundantly
[INFO] [stdout]    --> src/tokenizer.rs:16:29
[INFO] [stdout]     |
[INFO] [stdout] 16  |   use crate::{internal_error, internal_error_map, error::*};
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/error.rs:175:1
[INFO] [stdout]     |
[INFO] [stdout] 175 | / macro_rules! internal_error_map
[INFO] [stdout] 176 | | {
[INFO] [stdout] 177 | |     ($src:expr,$($arg:tt)*) => (
[INFO] [stdout] 178 | |         $crate::CDnsError::new($src, format!($($arg)*))
[INFO] [stdout] 179 | |     )
[INFO] [stdout] 180 | | }
[INFO] [stdout]     | |_- the item `internal_error_map` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/sync/network.rs:13:26
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::io::{ErrorKind, Write};
[INFO] [stdout]    |                          ^^^^^
[INFO] [stdout] 14 | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `Write` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/sync/query.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:304:33
[INFO] [stdout]     |
[INFO] [stdout] 304 | ...                   /// primary name server
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 305 | ...                   pnm: name2str(pkt, None)?, 
[INFO] [stdout]     |                       ------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:306:33
[INFO] [stdout]     |
[INFO] [stdout] 306 | ...                   /// responsible authority mailbox
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 307 | ...                   ram: name2str(pkt, None)?,
[INFO] [stdout]     |                       ------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:308:33
[INFO] [stdout]     |
[INFO] [stdout] 308 | ...                   /// serial number
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 309 | ...                   serial: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:310:33
[INFO] [stdout]     |
[INFO] [stdout] 310 | ...                   /// refresh interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 311 | ...                   interv_refr: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       --------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:312:33
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   /// retry interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 313 | ...                   interv_retry: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:314:33
[INFO] [stdout]     |
[INFO] [stdout] 314 | ...                   /// expire limit
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 315 | ...                   expire_limit: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ---------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync/common.rs:316:33
[INFO] [stdout]     |
[INFO] [stdout] 316 | ...                   /// minimum TTL
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | ...                   min_ttl: pkt.read_u32::<BigEndian>().map_err(map_read_err)?,
[INFO] [stdout]     |                       ----------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::atomic::AtomicUsize`
[INFO] [stdout]   --> src/sync/cfg_parsers.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::{io::Read, sync::atomic::AtomicUsize};
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::Mutex`
[INFO] [stdout]   --> src/a_sync/cfg_parsers.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use tokio::sync::Mutex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ROUND_ROBIN_CNT`, `ResolveConfEntry`, `RoundRobinIterator`
[INFO] [stdout]   --> src/a_sync/cfg_resolv_parser.rs:19:60
[INFO] [stdout]    |
[INFO] [stdout] 19 | use crate::cfg_resolv_parser::{ResolveConfig, OptionFlags, ResolveConfEntry, RoundRobinIterator, ROUND_ROBIN_CNT};
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:312:33
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   /// primary name server
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 313 | ...                   pnm: name2str(pkt, None).await?, 
[INFO] [stdout]     |                       ------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:314:33
[INFO] [stdout]     |
[INFO] [stdout] 314 | ...                   /// responsible authority mailbox
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 315 | ...                   ram: name2str(pkt, None).await?,
[INFO] [stdout]     |                       ------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:316:33
[INFO] [stdout]     |
[INFO] [stdout] 316 | ...                   /// serial number
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | ...                   serial: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:318:33
[INFO] [stdout]     |
[INFO] [stdout] 318 | ...                   /// refresh interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 319 | ...                   interv_refr: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------ rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:320:33
[INFO] [stdout]     |
[INFO] [stdout] 320 | ...                   /// retry interval
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 321 | ...                   interv_retry: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:322:33
[INFO] [stdout]     |
[INFO] [stdout] 322 | ...                   /// expire limit
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 323 | ...                   expire_limit: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       ------------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/a_sync/common.rs:324:33
[INFO] [stdout]     |
[INFO] [stdout] 324 | ...                   /// minimum TTL
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 325 | ...                   min_ttl: BoAsyncReadExt::read_u32::<BigEndian>(pkt).await.map_err(map_read_err)?,
[INFO] [stdout]     |                       -------------------------------------------------------------------------------- rustdoc does not generate documentation for expression fields
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/a_sync/query.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::convert::{TryFrom};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::Mutex`
[INFO] [stdout]   --> src/a_sync/network.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use tokio::sync::Mutex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::Arc`
[INFO] [stdout]   --> src/a_sync/query_async_taps.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::{sync::Arc};
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SocketTap`
[INFO] [stdout]   --> src/a_sync/query_async_taps.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 13 | use super::{network::{SocketTap, NetworkTapType}, common::DnsRequestHeader};
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/query.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/query.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                             ^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `internal_error`
[INFO] [stdout]   --> src/tokenizer.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 | use crate::{internal_error, internal_error_map, error::*};
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `internal_error_map` is imported redundantly
[INFO] [stdout]    --> src/tokenizer.rs:16:29
[INFO] [stdout]     |
[INFO] [stdout] 16  |   use crate::{internal_error, internal_error_map, error::*};
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/error.rs:175:1
[INFO] [stdout]     |
[INFO] [stdout] 175 | / macro_rules! internal_error_map
[INFO] [stdout] 176 | | {
[INFO] [stdout] 177 | |     ($src:expr,$($arg:tt)*) => (
[INFO] [stdout] 178 | |         $crate::CDnsError::new($src, format!($($arg)*))
[INFO] [stdout] 179 | |     )
[INFO] [stdout] 180 | | }
[INFO] [stdout]     | |_- the item `internal_error_map` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/a_sync/caches.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<'cache> CacheTime<'cache>
[INFO] [stdout]    | ------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn new(path: &'cache Path) -> CDnsResult<CacheTime<'cache>>
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/a_sync/caches.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 110 | impl<T: Default + ConfigParser<T> + CacheOperations> CacheInstance<T>
[INFO] [stdout]     | --------------------------------------------------------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 113 |     fn new() -> CDnsResult<Self>
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `foresee_char` is never used
[INFO] [stdout]   --> src/tokenizer.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl<'token> ConfTokenizer<'token>
[INFO] [stdout]    | ---------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn foresee_char(&mut self) -> Option<char>
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/sync/query.rs:809:25
[INFO] [stdout]     |
[INFO] [stdout] 809 |                         drop(req);
[INFO] [stdout]     |                         ^^^^^---^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&common::DnsRequestHeader`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/a_sync/caches.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<'cache> CacheTime<'cache>
[INFO] [stdout]    | ------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn new(path: &'cache Path) -> CDnsResult<CacheTime<'cache>>
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/a_sync/caches.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 110 | impl<T: Default + ConfigParser<T> + CacheOperations> CacheInstance<T>
[INFO] [stdout]     | --------------------------------------------------------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 113 |     fn new() -> CDnsResult<Self>
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `foresee_char` is never used
[INFO] [stdout]   --> src/tokenizer.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl<'token> ConfTokenizer<'token>
[INFO] [stdout]    | ---------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn foresee_char(&mut self) -> Option<char>
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/sync/query.rs:809:25
[INFO] [stdout]     |
[INFO] [stdout] 809 |                         drop(req);
[INFO] [stdout]     |                         ^^^^^---^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              argument has type `&common::DnsRequestHeader`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.31s
[INFO] running `Command { std: "docker" "inspect" "41e88ddac2c4c69a6c5c35da69a3668c42b93503c032b53c24ee333dcd4cef0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41e88ddac2c4c69a6c5c35da69a3668c42b93503c032b53c24ee333dcd4cef0d", kill_on_drop: false }`
[INFO] [stdout] 41e88ddac2c4c69a6c5c35da69a3668c42b93503c032b53c24ee333dcd4cef0d