[INFO] fetching crate mymq 0.1.0...
[INFO] checking mymq-0.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate mymq 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate mymq 0.1.0
[INFO] finished tweaking crates.io crate mymq 0.1.0
[INFO] tweaked toml for crates.io crate mymq 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mymq 0.1.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mymq 0.1.0 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded once_cell v1.13.1
[INFO] [stderr]   Downloaded pnet_base v0.31.0
[INFO] [stderr]   Downloaded pnet_datalink v0.31.0
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.82
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.82
[INFO] [stderr]   Downloaded derive_arbitrary v1.1.3
[INFO] [stderr]   Downloaded iana-time-zone v0.1.46
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.82
[INFO] [stderr]   Downloaded arbitrary v1.1.3
[INFO] [stderr]   Downloaded pcap v0.10.1
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.10
[INFO] [stderr]   Downloaded js-sys v0.3.59
[INFO] [stderr]   Downloaded mio v0.8.4
[INFO] [stderr]   Downloaded serde v1.0.144
[INFO] [stderr]   Downloaded cityhash-rs v1.0.1
[INFO] [stderr]   Downloaded syn v1.0.99
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.82
[INFO] [stderr]   Downloaded pnet_macros v0.31.0
[INFO] [stderr]   Downloaded pnet_packet v0.31.0
[INFO] [stderr]   Downloaded pnet v0.31.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.82
[INFO] [stderr]   Downloaded nix v0.25.0
[INFO] [stderr]   Downloaded ipnetwork v0.19.0
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.11
[INFO] [stderr]   Downloaded proc-macro2 v1.0.43
[INFO] [stderr]   Downloaded unicode-ident v1.0.3
[INFO] [stderr]   Downloaded android_system_properties v0.1.4
[INFO] [stderr]   Downloaded ctrlc v3.2.3
[INFO] [stderr]   Downloaded pnet_transport v0.31.0
[INFO] [stderr]   Downloaded pnet_sys v0.31.0
[INFO] [stderr]   Downloaded pnet_macros_support v0.31.0
[INFO] [stderr]   Downloaded libc v0.2.132
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41975cf4ec5571261d207f2e91d79e5a9471321d106f510d203563725c47f9e4
[INFO] running `Command { std: "docker" "start" "-a" "41975cf4ec5571261d207f2e91d79e5a9471321d106f510d203563725c47f9e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41975cf4ec5571261d207f2e91d79e5a9471321d106f510d203563725c47f9e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41975cf4ec5571261d207f2e91d79e5a9471321d106f510d203563725c47f9e4", kill_on_drop: false }`
[INFO] [stdout] 41975cf4ec5571261d207f2e91d79e5a9471321d106f510d203563725c47f9e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ecb34cec187160f0613299219f06c5ab949101a9e88241ad2bb9e0d81907667
[INFO] running `Command { std: "docker" "start" "-a" "0ecb34cec187160f0613299219f06c5ab949101a9e88241ad2bb9e0d81907667", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking cityhash-rs v1.0.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking uuid v1.1.2
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]    Compiling derive_arbitrary v1.1.3
[INFO] [stderr]     Checking arbitrary v1.1.3
[INFO] [stderr]     Checking mymq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | #![feature(backtrace_frames)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fixed_byte`
[INFO] [stdout]    --> src/v5/types.rs:436:16
[INFO] [stdout]     |
[INFO] [stdout] 436 | pub(crate) use fixed_byte;
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]   --> src/broker/spinlock.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 | #[cfg(feature = "debug")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]    = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]   --> src/broker/spinlock.rs:68:7
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[cfg(feature = "debug")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]    = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:100:29
[INFO] [stdout]     |
[INFO] [stdout] 100 |                     if cfg!(feature = "debug") {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:106:21
[INFO] [stdout]     |
[INFO] [stdout] 106 |             if cfg!(feature = "debug") {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:129:21
[INFO] [stdout]     |
[INFO] [stdout] 129 |             if cfg!(feature = "debug") {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:139:29
[INFO] [stdout]     |
[INFO] [stdout] 139 |                     if cfg!(feature = "debug") {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |             if cfg!(feature = "debug") {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `backtrace` has been stable since 1.65.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 | #![feature(backtrace)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `result_flattening` has been stable since 1.89.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 | #![feature(result_flattening)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `map_first_last` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![feature(map_first_last)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | #![feature(backtrace_frames)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fixed_byte`
[INFO] [stdout]    --> src/v5/types.rs:436:16
[INFO] [stdout]     |
[INFO] [stdout] 436 | pub(crate) use fixed_byte;
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]   --> src/broker/spinlock.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 | #[cfg(feature = "debug")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]    = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]   --> src/broker/spinlock.rs:68:7
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[cfg(feature = "debug")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]    = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:100:29
[INFO] [stdout]     |
[INFO] [stdout] 100 |                     if cfg!(feature = "debug") {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:106:21
[INFO] [stdout]     |
[INFO] [stdout] 106 |             if cfg!(feature = "debug") {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:129:21
[INFO] [stdout]     |
[INFO] [stdout] 129 |             if cfg!(feature = "debug") {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:139:29
[INFO] [stdout]     |
[INFO] [stdout] 139 |                     if cfg!(feature = "debug") {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `debug`
[INFO] [stdout]    --> src/broker/spinlock.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |             if cfg!(feature = "debug") {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `arbitrary`, `backtrace`, `broker`, `chrono`, `client`, `ctrlc`, `default`, `env_logger`, `fuzzy`, `mymqd`, `netw`, `pcap`, `pnet`, `pnet_datalink`, `prettytable-rs`, `rand`, and `structopt`
[INFO] [stdout]     = help: consider adding `debug` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `backtrace` has been stable since 1.65.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 | #![feature(backtrace)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `result_flattening` has been stable since 1.89.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 | #![feature(result_flattening)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `map_first_last` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![feature(map_first_last)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mymq` (lib) due to 1 previous error; 11 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mymq` (lib test) due to 1 previous error; 11 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0ecb34cec187160f0613299219f06c5ab949101a9e88241ad2bb9e0d81907667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ecb34cec187160f0613299219f06c5ab949101a9e88241ad2bb9e0d81907667", kill_on_drop: false }`
[INFO] [stdout] 0ecb34cec187160f0613299219f06c5ab949101a9e88241ad2bb9e0d81907667
