[INFO] fetching crate tracing-stackdriver 0.10.0...
[INFO] checking tracing-stackdriver-0.10.0 against try#0c7fed2b7584d310ca8221267fa1b3bec4df427f for pr-133502-4
[INFO] extracting crate tracing-stackdriver 0.10.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate tracing-stackdriver 0.10.0 on toolchain 0c7fed2b7584d310ca8221267fa1b3bec4df427f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tracing-stackdriver 0.10.0
[INFO] finished tweaking crates.io crate tracing-stackdriver 0.10.0
[INFO] tweaked toml for crates.io crate tracing-stackdriver 0.10.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 117 packages to latest compatible versions
[INFO] [stderr]       Adding http v0.2.12 (available: v1.3.1)
[INFO] [stderr]       Adding opentelemetry v0.22.0 (available: v0.29.1)
[INFO] [stderr]       Adding opentelemetry-stdout v0.3.0 (available: v0.29.0)
[INFO] [stderr]       Adding opentelemetry_sdk v0.22.1 (available: v0.29.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.1)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.12)
[INFO] [stderr]       Adding tracing-opentelemetry v0.23.0 (available: v0.30.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73b706c0356f2c6acdf90f45e5f9bdbf8ec3dea602d553c55ec0dd2569d3279d
[INFO] running `Command { std: "docker" "start" "-a" "73b706c0356f2c6acdf90f45e5f9bdbf8ec3dea602d553c55ec0dd2569d3279d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73b706c0356f2c6acdf90f45e5f9bdbf8ec3dea602d553c55ec0dd2569d3279d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73b706c0356f2c6acdf90f45e5f9bdbf8ec3dea602d553c55ec0dd2569d3279d", kill_on_drop: false }`
[INFO] [stdout] 73b706c0356f2c6acdf90f45e5f9bdbf8ec3dea602d553c55ec0dd2569d3279d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12f26876017d5a36f0a3b461e2e4121579e3ed1d98a439b6a5bf8a4c3c517236
[INFO] running `Command { std: "docker" "start" "-a" "12f26876017d5a36f0a3b461e2e4121579e3ed1d98a439b6a5bf8a4c3c517236", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]     Checking urlencoding v2.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling async-trait v0.1.88
[INFO] [stderr]     Checking ordered-float v4.6.0
[INFO] [stderr]     Checking chrono v0.4.40
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking opentelemetry v0.22.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking crossbeam-channel v0.5.15
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking opentelemetry_sdk v0.22.1
[INFO] [stderr]     Checking serde_json v1.0.140
[INFO] [stderr]     Checking tracing-serde v0.2.0
[INFO] [stderr]     Checking deranged v0.4.0
[INFO] [stderr]     Checking time v0.3.41
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]     Checking opentelemetry-stdout v0.3.0
[INFO] [stderr]     Checking tracing-stackdriver v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `tracing_unstable`
[INFO] [stdout]  --> src/google.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     all(tracing_unstable, feature = "valuable"),
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:106:23
[INFO] [stdout]     |
[INFO] [stdout] 106 | #[cfg(any(docsrs, all(tracing_unstable, feature = "valuable")))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:142:23
[INFO] [stdout]     |
[INFO] [stdout] 142 | #[cfg(any(docsrs, all(tracing_unstable, feature = "valuable")))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:150:11
[INFO] [stdout]     |
[INFO] [stdout] 150 | #[cfg(all(tracing_unstable, feature = "valuable"))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:170:23
[INFO] [stdout]     |
[INFO] [stdout] 170 | #[cfg(any(docsrs, all(tracing_unstable, feature = "valuable")))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:227:23
[INFO] [stdout]     |
[INFO] [stdout] 227 | #[cfg(any(docsrs, all(tracing_unstable, feature = "valuable")))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]   --> src/google.rs:92:19
[INFO] [stdout]    |
[INFO] [stdout] 92 |         #[cfg(all(tracing_unstable, feature = "valuable"))]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/visitor.rs:134:15
[INFO] [stdout]     |
[INFO] [stdout] 134 |     #[cfg(all(tracing_unstable, feature = "valuable"))]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]  --> src/google.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     all(tracing_unstable, feature = "valuable"),
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:106:23
[INFO] [stdout]     |
[INFO] [stdout] 106 | #[cfg(any(docsrs, all(tracing_unstable, feature = "valuable")))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:142:23
[INFO] [stdout]     |
[INFO] [stdout] 142 | #[cfg(any(docsrs, all(tracing_unstable, feature = "valuable")))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:150:11
[INFO] [stdout]     |
[INFO] [stdout] 150 | #[cfg(all(tracing_unstable, feature = "valuable"))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:170:23
[INFO] [stdout]     |
[INFO] [stdout] 170 | #[cfg(any(docsrs, all(tracing_unstable, feature = "valuable")))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/google.rs:227:23
[INFO] [stdout]     |
[INFO] [stdout] 227 | #[cfg(any(docsrs, all(tracing_unstable, feature = "valuable")))]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]   --> src/google.rs:92:19
[INFO] [stdout]    |
[INFO] [stdout] 92 |         #[cfg(all(tracing_unstable, feature = "valuable"))]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]    --> src/visitor.rs:134:15
[INFO] [stdout]     |
[INFO] [stdout] 134 |     #[cfg(all(tracing_unstable, feature = "valuable"))]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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 name: `tracing_unstable`
[INFO] [stdout]  --> tests/valuable.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg(all(tracing_unstable, feature = "valuable"))]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(tracing_unstable)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(tracing_unstable)");` to the top of the `build.rs`
[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: fields `file` and `line` are never read
[INFO] [stdout]  --> tests/mocks.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct MockSourceLocation {
[INFO] [stdout]   |            ------------------ fields in this struct
[INFO] [stdout] 7 |     pub file: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 8 |     pub line: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MockSourceLocation` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `time`, `target`, `severity`, `source_location`, `labels`, and `insert_id` are never read
[INFO] [stdout]   --> tests/mocks.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct MockDefaultEvent {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] 13 |     #[serde(deserialize_with = "time::serde::rfc3339::deserialize")]
[INFO] [stdout] 14 |     pub time: OffsetDateTime,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 15 |     pub target: String,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 16 |     pub severity: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 17 |     #[serde(rename = "logging.googleapis.com/sourceLocation")]
[INFO] [stdout] 18 |     pub source_location: MockSourceLocation,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 19 |     #[serde(rename = "logging.googleapis.com/labels", default)]
[INFO] [stdout] 20 |     pub labels: BTreeMap<String, String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 21 |     #[serde(rename = "logging.googleapis.com/insertId", default)]
[INFO] [stdout] 22 |     pub insert_id: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockDefaultEvent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `foo` are never read
[INFO] [stdout]   --> tests/mocks.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct MockSpan {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 27 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 28 |     pub foo: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockSpan` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]   --> tests/mocks.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct MockEventWithSpan {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] 33 |     pub span: MockSpan,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockEventWithSpan` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `file` and `line` are never read
[INFO] [stdout]  --> tests/mocks.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct MockSourceLocation {
[INFO] [stdout]   |            ------------------ fields in this struct
[INFO] [stdout] 7 |     pub file: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 8 |     pub line: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MockSourceLocation` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `time`, `target`, `severity`, `source_location`, and `insert_id` are never read
[INFO] [stdout]   --> tests/mocks.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct MockDefaultEvent {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] 13 |     #[serde(deserialize_with = "time::serde::rfc3339::deserialize")]
[INFO] [stdout] 14 |     pub time: OffsetDateTime,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 15 |     pub target: String,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 16 |     pub severity: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 17 |     #[serde(rename = "logging.googleapis.com/sourceLocation")]
[INFO] [stdout] 18 |     pub source_location: MockSourceLocation,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub insert_id: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockDefaultEvent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `foo` are never read
[INFO] [stdout]   --> tests/mocks.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct MockSpan {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 27 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 28 |     pub foo: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockSpan` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]   --> tests/mocks.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct MockEventWithSpan {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] 33 |     pub span: MockSpan,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockEventWithSpan` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `http_request` is never read
[INFO] [stdout]   --> tests/mocks.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct MockHttpEvent {
[INFO] [stdout]    |            ------------- field in this struct
[INFO] [stdout] 48 |     pub http_request: MockHttpRequest,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockHttpEvent` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `file` and `line` are never read
[INFO] [stdout]  --> tests/mocks.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct MockSourceLocation {
[INFO] [stdout]   |            ------------------ fields in this struct
[INFO] [stdout] 7 |     pub file: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 8 |     pub line: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MockSourceLocation` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `time`, `target`, `severity`, `source_location`, and `labels` are never read
[INFO] [stdout]   --> tests/mocks.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct MockDefaultEvent {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] 13 |     #[serde(deserialize_with = "time::serde::rfc3339::deserialize")]
[INFO] [stdout] 14 |     pub time: OffsetDateTime,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 15 |     pub target: String,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 16 |     pub severity: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 17 |     #[serde(rename = "logging.googleapis.com/sourceLocation")]
[INFO] [stdout] 18 |     pub source_location: MockSourceLocation,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 19 |     #[serde(rename = "logging.googleapis.com/labels", default)]
[INFO] [stdout] 20 |     pub labels: BTreeMap<String, String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockDefaultEvent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `foo` are never read
[INFO] [stdout]   --> tests/mocks.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct MockSpan {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 27 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 28 |     pub foo: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockSpan` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]   --> tests/mocks.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct MockEventWithSpan {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] 33 |     pub span: MockSpan,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockEventWithSpan` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `http_request` is never read
[INFO] [stdout]   --> tests/mocks.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct MockHttpEvent {
[INFO] [stdout]    |            ------------- field in this struct
[INFO] [stdout] 48 |     pub http_request: MockHttpRequest,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockHttpEvent` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `time`, `target`, `severity`, `labels`, and `insert_id` are never read
[INFO] [stdout]   --> tests/mocks.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct MockDefaultEvent {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] 13 |     #[serde(deserialize_with = "time::serde::rfc3339::deserialize")]
[INFO] [stdout] 14 |     pub time: OffsetDateTime,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 15 |     pub target: String,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 16 |     pub severity: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub labels: BTreeMap<String, String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 21 |     #[serde(rename = "logging.googleapis.com/insertId", default)]
[INFO] [stdout] 22 |     pub insert_id: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockDefaultEvent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `foo` are never read
[INFO] [stdout]   --> tests/mocks.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct MockSpan {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 27 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 28 |     pub foo: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockSpan` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]   --> tests/mocks.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct MockEventWithSpan {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] 33 |     pub span: MockSpan,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockEventWithSpan` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `http_request` is never read
[INFO] [stdout]   --> tests/mocks.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct MockHttpEvent {
[INFO] [stdout]    |            ------------- field in this struct
[INFO] [stdout] 48 |     pub http_request: MockHttpRequest,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockHttpEvent` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `file` and `line` are never read
[INFO] [stdout]  --> tests/mocks.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct MockSourceLocation {
[INFO] [stdout]   |            ------------------ fields in this struct
[INFO] [stdout] 7 |     pub file: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 8 |     pub line: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MockSourceLocation` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `source_location`, `labels`, and `insert_id` are never read
[INFO] [stdout]   --> tests/mocks.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct MockDefaultEvent {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub source_location: MockSourceLocation,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 19 |     #[serde(rename = "logging.googleapis.com/labels", default)]
[INFO] [stdout] 20 |     pub labels: BTreeMap<String, String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 21 |     #[serde(rename = "logging.googleapis.com/insertId", default)]
[INFO] [stdout] 22 |     pub insert_id: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockDefaultEvent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `http_request` is never read
[INFO] [stdout]   --> tests/mocks.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct MockHttpEvent {
[INFO] [stdout]    |            ------------- field in this struct
[INFO] [stdout] 48 |     pub http_request: MockHttpRequest,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MockHttpEvent` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.68s
[INFO] running `Command { std: "docker" "inspect" "12f26876017d5a36f0a3b461e2e4121579e3ed1d98a439b6a5bf8a4c3c517236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12f26876017d5a36f0a3b461e2e4121579e3ed1d98a439b6a5bf8a4c3c517236", kill_on_drop: false }`
[INFO] [stdout] 12f26876017d5a36f0a3b461e2e4121579e3ed1d98a439b6a5bf8a4c3c517236