[INFO] cloning repository https://github.com/Genjedi/ICP-rust-workshop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Genjedi/ICP-rust-workshop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGenjedi%2FICP-rust-workshop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGenjedi%2FICP-rust-workshop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66fde12f0cc6808bee7ca7b74c4600dc5cd7189f
[INFO] checking Genjedi/ICP-rust-workshop against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGenjedi%2FICP-rust-workshop" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Genjedi/ICP-rust-workshop 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 git repo https://github.com/Genjedi/ICP-rust-workshop
[INFO] finished tweaking git repo https://github.com/Genjedi/ICP-rust-workshop
[INFO] tweaked toml for git repo https://github.com/Genjedi/ICP-rust-workshop written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Genjedi/ICP-rust-workshop 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]  Downloading crates ...
[INFO] [stderr]   Downloaded ic0 v0.21.1
[INFO] [stderr]   Downloaded ic-cdk v0.12.1
[INFO] [stderr]   Downloaded csscolorparser v0.6.2
[INFO] [stderr]   Downloaded candid_derive v0.6.5
[INFO] [stderr]   Downloaded ic_principal v0.1.1
[INFO] [stderr]   Downloaded colorgrad v0.6.2
[INFO] [stderr]   Downloaded pretty v0.12.3
[INFO] [stderr]   Downloaded syn v2.0.49
[INFO] [stderr]   Downloaded candid v0.10.3
[INFO] [stderr]   Downloaded png v0.17.12
[INFO] [stderr]   Downloaded serde_tokenstream v0.1.7
[INFO] [stderr]   Downloaded ic-cdk-macros v0.8.4
[INFO] [stderr]   Downloaded serde_derive v1.0.196
[INFO] [stderr]   Downloaded serde v1.0.196
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 72b31f4a5a955b07e1a5477247e8821aabbae22ffdf3560bf01cedb4e79d1a64
[INFO] running `Command { std: "docker" "start" "-a" "72b31f4a5a955b07e1a5477247e8821aabbae22ffdf3560bf01cedb4e79d1a64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72b31f4a5a955b07e1a5477247e8821aabbae22ffdf3560bf01cedb4e79d1a64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72b31f4a5a955b07e1a5477247e8821aabbae22ffdf3560bf01cedb4e79d1a64", kill_on_drop: false }`
[INFO] [stdout] 72b31f4a5a955b07e1a5477247e8821aabbae22ffdf3560bf01cedb4e79d1a64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 470906bd8a9c9aea26e790c63f75267b84bb75fc9775bf26627823c4e442d9c3
[INFO] running `Command { std: "docker" "start" "-a" "470906bd8a9c9aea26e790c63f75267b84bb75fc9775bf26627823c4e442d9c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling siphasher v0.3.11
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling cpufeatures v0.2.12
[INFO] [stderr]    Compiling phf_shared v0.11.2
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling typed-arena v2.0.2
[INFO] [stderr]    Compiling data-encoding v2.5.0
[INFO] [stderr]    Compiling unicode-width v0.1.11
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]     Checking fdeflate v0.3.4
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling pretty v0.12.3
[INFO] [stderr]    Compiling leb128 v0.2.5
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking bytemuck v1.14.3
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking png v0.17.12
[INFO] [stderr]     Checking utf8-width v0.1.7
[INFO] [stderr]     Checking ic0 v0.21.1
[INFO] [stderr]     Checking qrcodegen v1.8.0
[INFO] [stderr]    Compiling syn v2.0.49
[INFO] [stderr]     Checking html-escape v0.2.13
[INFO] [stderr]    Compiling psm v0.1.21
[INFO] [stderr]    Compiling stacker v0.1.15
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking image v0.24.8
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr]     Checking qrcode-generator v4.1.9
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]    Compiling candid_derive v0.6.5
[INFO] [stderr]    Compiling phf_macros v0.11.2
[INFO] [stderr]     Checking phf v0.11.2
[INFO] [stderr]     Checking csscolorparser v0.6.2
[INFO] [stderr]     Checking colorgrad v0.6.2
[INFO] [stderr]    Compiling binread_derive v2.1.0
[INFO] [stderr]    Compiling binread v2.2.0
[INFO] [stderr]     Checking ic_principal v0.1.1
[INFO] [stderr]     Checking serde_bytes v0.11.14
[INFO] [stderr]    Compiling serde_tokenstream v0.1.7
[INFO] [stderr]     Checking candid v0.10.3
[INFO] [stderr]    Compiling ic-cdk-macros v0.8.4
[INFO] [stderr]     Checking ic-cdk v0.12.1
[INFO] [stderr]     Checking qrcode_backend v1.1.0 (/opt/rustwide/workdir/src/qrcode_backend)
[INFO] [stdout] warning: the item `ic_cdk` is imported redundantly
[INFO] [stdout]  --> src/qrcode_backend/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ic_cdk;
[INFO] [stdout]   |     ^^^^^^ the item `ic_cdk` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ic_cdk` is imported redundantly
[INFO] [stdout]  --> src/qrcode_backend/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ic_cdk;
[INFO] [stdout]   |     ^^^^^^ the item `ic_cdk` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 38.47s
[INFO] running `Command { std: "docker" "inspect" "470906bd8a9c9aea26e790c63f75267b84bb75fc9775bf26627823c4e442d9c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "470906bd8a9c9aea26e790c63f75267b84bb75fc9775bf26627823c4e442d9c3", kill_on_drop: false }`
[INFO] [stdout] 470906bd8a9c9aea26e790c63f75267b84bb75fc9775bf26627823c4e442d9c3
[INFO] checking Genjedi/ICP-rust-workshop against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGenjedi%2FICP-rust-workshop" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Genjedi/ICP-rust-workshop on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Genjedi/ICP-rust-workshop
[INFO] finished tweaking git repo https://github.com/Genjedi/ICP-rust-workshop
[INFO] tweaked toml for git repo https://github.com/Genjedi/ICP-rust-workshop written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Genjedi/ICP-rust-workshop 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 867494eb0d916f84d81745c33ce524bbafcc3db8a96f7affe1b3c9e55973290c
[INFO] running `Command { std: "docker" "start" "-a" "867494eb0d916f84d81745c33ce524bbafcc3db8a96f7affe1b3c9e55973290c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "867494eb0d916f84d81745c33ce524bbafcc3db8a96f7affe1b3c9e55973290c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "867494eb0d916f84d81745c33ce524bbafcc3db8a96f7affe1b3c9e55973290c", kill_on_drop: false }`
[INFO] [stdout] 867494eb0d916f84d81745c33ce524bbafcc3db8a96f7affe1b3c9e55973290c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac24e9076dda5a7650632bd5efd7c8cb931aa4f9437625e9c1f0fdbcc470c11f
[INFO] running `Command { std: "docker" "start" "-a" "ac24e9076dda5a7650632bd5efd7c8cb931aa4f9437625e9c1f0fdbcc470c11f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling siphasher v0.3.11
[INFO] [stderr]    Compiling cpufeatures v0.2.12
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]    Compiling data-encoding v2.5.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling phf_shared v0.11.2
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling unicode-width v0.1.11
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling typed-arena v2.0.2
[INFO] [stderr]     Checking fdeflate v0.3.4
[INFO] [stderr]    Compiling pretty v0.12.3
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.49
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]    Compiling leb128 v0.2.5
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]     Checking utf8-width v0.1.7
[INFO] [stderr]     Checking bytemuck v1.14.3
[INFO] [stderr]     Checking html-escape v0.2.13
[INFO] [stderr]     Checking qrcodegen v1.8.0
[INFO] [stderr]     Checking ic0 v0.21.1
[INFO] [stderr]     Checking png v0.17.12
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]     Checking image v0.24.8
[INFO] [stderr]    Compiling psm v0.1.21
[INFO] [stderr]    Compiling stacker v0.1.15
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr]     Checking qrcode-generator v4.1.9
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]    Compiling candid_derive v0.6.5
[INFO] [stderr]    Compiling phf_macros v0.11.2
[INFO] [stderr]     Checking phf v0.11.2
[INFO] [stderr]     Checking csscolorparser v0.6.2
[INFO] [stderr]    Compiling binread_derive v2.1.0
[INFO] [stderr]     Checking colorgrad v0.6.2
[INFO] [stderr]    Compiling binread v2.2.0
[INFO] [stderr]     Checking serde_bytes v0.11.14
[INFO] [stderr]     Checking ic_principal v0.1.1
[INFO] [stderr]    Compiling serde_tokenstream v0.1.7
[INFO] [stderr]     Checking candid v0.10.3
[INFO] [stderr]    Compiling ic-cdk-macros v0.8.4
[INFO] [stderr]     Checking ic-cdk v0.12.1
[INFO] [stderr]     Checking qrcode_backend v1.1.0 (/opt/rustwide/workdir/src/qrcode_backend)
[INFO] [stdout] warning: the item `ic_cdk` is imported redundantly
[INFO] [stdout]  --> src/qrcode_backend/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ic_cdk;
[INFO] [stdout]   |     ^^^^^^ the item `ic_cdk` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ic_cdk` is imported redundantly
[INFO] [stdout]  --> src/qrcode_backend/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ic_cdk;
[INFO] [stdout]   |     ^^^^^^ the item `ic_cdk` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.42s
[INFO] running `Command { std: "docker" "inspect" "ac24e9076dda5a7650632bd5efd7c8cb931aa4f9437625e9c1f0fdbcc470c11f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac24e9076dda5a7650632bd5efd7c8cb931aa4f9437625e9c1f0fdbcc470c11f", kill_on_drop: false }`
[INFO] [stdout] ac24e9076dda5a7650632bd5efd7c8cb931aa4f9437625e9c1f0fdbcc470c11f