[INFO] cloning repository https://github.com/Kilerd/darling [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kilerd/darling" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKilerd%2Fdarling", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKilerd%2Fdarling'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 6dbc4035eef58b6bb4a3aa2c7b4a80f64c3865d9 [INFO] testing Kilerd/darling against 1.60.0 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKilerd%2Fdarling" "/workspace/builds/worker-0/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Kilerd/darling on toolchain 1.60.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Kilerd/darling [INFO] finished tweaking git repo https://github.com/Kilerd/darling [INFO] tweaked toml for git repo https://github.com/Kilerd/darling written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/Kilerd/darling already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded serde_with v1.9.4 [INFO] [stderr] Downloaded serde_with_macros v1.4.2 [INFO] [stderr] Downloaded thiserror v1.0.28 [INFO] [stderr] Downloaded thiserror-impl v1.0.28 [INFO] [stderr] Downloaded pilot v0.0.7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c065b8b7fa73ce6e445c97c92c9d4ad64d944be003755b6a45090489b18c1a20 [INFO] running `Command { std: "docker" "start" "-a" "c065b8b7fa73ce6e445c97c92c9d4ad64d944be003755b6a45090489b18c1a20", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c065b8b7fa73ce6e445c97c92c9d4ad64d944be003755b6a45090489b18c1a20", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c065b8b7fa73ce6e445c97c92c9d4ad64d944be003755b6a45090489b18c1a20", kill_on_drop: false }` [INFO] [stdout] c065b8b7fa73ce6e445c97c92c9d4ad64d944be003755b6a45090489b18c1a20 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b498339a7c9e584ae31bf6edb208e57be21739dd8f8770365c402a0e642ff52a [INFO] running `Command { std: "docker" "start" "-a" "b498339a7c9e584ae31bf6edb208e57be21739dd8f8770365c402a0e642ff52a", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.29 [INFO] [stderr] Compiling libc v0.2.101 [INFO] [stderr] Compiling syn v1.0.75 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling cc v1.0.69 [INFO] [stderr] Compiling futures-core v0.3.17 [INFO] [stderr] Compiling smallvec v1.6.1 [INFO] [stderr] Compiling futures-task v0.3.17 [INFO] [stderr] Compiling serde v1.0.130 [INFO] [stderr] Compiling foreign-types-shared v0.1.1 [INFO] [stderr] Compiling openssl v0.10.36 [INFO] [stderr] Compiling futures-channel v0.3.17 [INFO] [stderr] Compiling ident_case v1.0.1 [INFO] [stderr] Compiling strsim v0.10.0 [INFO] [stderr] Compiling native-tls v0.2.8 [INFO] [stderr] Compiling futures-sink v0.3.17 [INFO] [stderr] Compiling openssl-probe v0.1.4 [INFO] [stderr] Compiling slab v0.4.4 [INFO] [stderr] Compiling unicode-bidi v0.3.6 [INFO] [stderr] Compiling encoding_rs v0.8.28 [INFO] [stderr] Compiling serde_json v1.0.67 [INFO] [stderr] Compiling rustversion v1.0.5 [INFO] [stderr] Compiling httpdate v1.0.1 [INFO] [stderr] Compiling regex-syntax v0.6.25 [INFO] [stderr] Compiling anyhow v1.0.43 [INFO] [stderr] Compiling tokio v1.10.1 [INFO] [stderr] Compiling futures-util v0.3.17 [INFO] [stderr] Compiling instant v0.1.10 [INFO] [stderr] Compiling tracing-core v0.1.19 [INFO] [stderr] Compiling http v0.2.4 [INFO] [stderr] Compiling tinyvec v1.3.1 [INFO] [stderr] Compiling indexmap v1.7.0 [INFO] [stderr] Compiling foreign-types v0.3.2 [INFO] [stderr] Compiling tracing v0.1.26 [INFO] [stderr] Compiling want v0.3.0 [INFO] [stderr] Compiling openssl-sys v0.9.66 [INFO] [stderr] Compiling unicode-normalization v0.1.19 [INFO] [stderr] Compiling regex v1.5.4 [INFO] [stderr] Compiling parking_lot_core v0.8.5 [INFO] [stderr] Compiling signal-hook-registry v1.4.0 [INFO] [stderr] Compiling mio v0.7.13 [INFO] [stderr] Compiling num_cpus v1.13.0 [INFO] [stderr] Compiling socket2 v0.4.1 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling time v0.1.44 [INFO] [stderr] Compiling quote v1.0.9 [INFO] [stderr] Compiling parking_lot v0.11.2 [INFO] [stderr] Compiling chrono v0.4.19 [INFO] [stderr] Compiling idna v0.2.3 [INFO] [stderr] Compiling http-body v0.4.3 [INFO] [stderr] Compiling env_logger v0.9.0 [INFO] [stderr] Compiling url v2.2.2 [INFO] [stderr] Compiling darling_core v0.13.0 [INFO] [stderr] Compiling tokio-macros v1.3.0 [INFO] [stderr] Compiling serde_derive v1.0.130 [INFO] [stderr] Compiling thiserror-impl v1.0.28 [INFO] [stderr] Compiling darling_macro v0.13.0 [INFO] [stderr] Compiling darling v0.13.0 [INFO] [stderr] Compiling serde_with_macros v1.4.2 [INFO] [stderr] Compiling thiserror v1.0.28 [INFO] [stderr] Compiling tokio-util v0.6.7 [INFO] [stderr] Compiling tokio-native-tls v0.3.0 [INFO] [stderr] Compiling h2 v0.3.4 [INFO] [stderr] Compiling serde_urlencoded v0.7.0 [INFO] [stderr] Compiling serde_with v1.9.4 [INFO] [stderr] Compiling hyper v0.14.12 [INFO] [stderr] Compiling hyper-tls v0.5.0 [INFO] [stderr] Compiling reqwest v0.11.4 [INFO] [stderr] Compiling pilot v0.0.7 [INFO] [stderr] Compiling darling v0.2.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `Lazy` [INFO] [stdout] --> src/main.rs:7:23 [INFO] [stdout] | [INFO] [stdout] 7 | use once_cell::sync::{Lazy, OnceCell}; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `pilot::method::SendMediaGroup` [INFO] [stdout] --> src/main.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use pilot::method::SendMediaGroup; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::sync::mpsc` [INFO] [stdout] --> src/main.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | use tokio::sync::mpsc; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Receiver` [INFO] [stdout] --> src/main.rs:12:25 [INFO] [stdout] | [INFO] [stdout] 12 | use tokio::sync::mpsc::{Receiver, Sender}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::sync::mpsc::error::SendError` [INFO] [stdout] --> src/main.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | use tokio::sync::mpsc::error::SendError; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::time::Duration` [INFO] [stdout] --> src/main.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | use tokio::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `consumer` [INFO] [stdout] --> src/main.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | let consumer = tokio::spawn(async move { [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_consumer` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:69:25 [INFO] [stdout] | [INFO] [stdout] 69 | bot.request(reply).await; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 45.48s [INFO] running `Command { std: "docker" "inspect" "b498339a7c9e584ae31bf6edb208e57be21739dd8f8770365c402a0e642ff52a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b498339a7c9e584ae31bf6edb208e57be21739dd8f8770365c402a0e642ff52a", kill_on_drop: false }` [INFO] [stdout] b498339a7c9e584ae31bf6edb208e57be21739dd8f8770365c402a0e642ff52a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 963ddc0d8ea61529b9182fc13fb24b58624b1cfb64491039a44f5ef7cc42ccff [INFO] running `Command { std: "docker" "start" "-a" "963ddc0d8ea61529b9182fc13fb24b58624b1cfb64491039a44f5ef7cc42ccff", kill_on_drop: false }` [INFO] [stderr] Compiling darling v0.2.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `Lazy` [INFO] [stdout] --> src/main.rs:7:23 [INFO] [stdout] | [INFO] [stdout] 7 | use once_cell::sync::{Lazy, OnceCell}; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `pilot::method::SendMediaGroup` [INFO] [stdout] --> src/main.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use pilot::method::SendMediaGroup; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::sync::mpsc` [INFO] [stdout] --> src/main.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | use tokio::sync::mpsc; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Receiver` [INFO] [stdout] --> src/main.rs:12:25 [INFO] [stdout] | [INFO] [stdout] 12 | use tokio::sync::mpsc::{Receiver, Sender}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::sync::mpsc::error::SendError` [INFO] [stdout] --> src/main.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | use tokio::sync::mpsc::error::SendError; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::time::Duration` [INFO] [stdout] --> src/main.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | use tokio::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `consumer` [INFO] [stdout] --> src/main.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | let consumer = tokio::spawn(async move { [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_consumer` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:69:25 [INFO] [stdout] | [INFO] [stdout] 69 | bot.request(reply).await; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 3.03s [INFO] running `Command { std: "docker" "inspect" "963ddc0d8ea61529b9182fc13fb24b58624b1cfb64491039a44f5ef7cc42ccff", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "963ddc0d8ea61529b9182fc13fb24b58624b1cfb64491039a44f5ef7cc42ccff", kill_on_drop: false }` [INFO] [stdout] 963ddc0d8ea61529b9182fc13fb24b58624b1cfb64491039a44f5ef7cc42ccff [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 57d65a5cfc53b095dc28e3a6c9247800458f6c6770cd0af4bc16c47d600727d8 [INFO] running `Command { std: "docker" "start" "-a" "57d65a5cfc53b095dc28e3a6c9247800458f6c6770cd0af4bc16c47d600727d8", kill_on_drop: false }` [INFO] [stderr] warning: unused import: `Lazy` [INFO] [stderr] --> src/main.rs:7:23 [INFO] [stderr] | [INFO] [stderr] 7 | use once_cell::sync::{Lazy, OnceCell}; [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `pilot::method::SendMediaGroup` [INFO] [stderr] --> src/main.rs:8:5 [INFO] [stderr] | [INFO] [stderr] 8 | use pilot::method::SendMediaGroup; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `tokio::sync::mpsc` [INFO] [stderr] --> src/main.rs:11:5 [INFO] [stderr] | [INFO] [stderr] 11 | use tokio::sync::mpsc; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Receiver` [INFO] [stderr] --> src/main.rs:12:25 [INFO] [stderr] | [INFO] [stderr] 12 | use tokio::sync::mpsc::{Receiver, Sender}; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `tokio::sync::mpsc::error::SendError` [INFO] [stderr] --> src/main.rs:13:5 [INFO] [stderr] | [INFO] [stderr] 13 | use tokio::sync::mpsc::error::SendError; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `tokio::time::Duration` [INFO] [stderr] --> src/main.rs:14:5 [INFO] [stderr] | [INFO] [stderr] 14 | use tokio::time::Duration; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `consumer` [INFO] [stderr] --> src/main.rs:59:9 [INFO] [stderr] | [INFO] [stderr] 59 | let consumer = tokio::spawn(async move { [INFO] [stderr] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_consumer` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/main.rs:69:25 [INFO] [stderr] | [INFO] [stderr] 69 | bot.request(reply).await; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: `darling` (bin "darling" test) generated 8 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/darling-f662d5b0eba18800) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "57d65a5cfc53b095dc28e3a6c9247800458f6c6770cd0af4bc16c47d600727d8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "57d65a5cfc53b095dc28e3a6c9247800458f6c6770cd0af4bc16c47d600727d8", kill_on_drop: false }` [INFO] [stdout] 57d65a5cfc53b095dc28e3a6c9247800458f6c6770cd0af4bc16c47d600727d8