[INFO] fetching crate huehue 0.4.1...
[INFO] checking huehue-0.4.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate huehue 0.4.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate huehue 0.4.1 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate huehue 0.4.1
[INFO] finished tweaking crates.io crate huehue 0.4.1
[INFO] tweaked toml for crates.io crate huehue 0.4.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate huehue 0.4.1 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_repr v0.1.7
[INFO] [stderr]   Downloaded ipnet v2.3.1
[INFO] [stderr]   Downloaded reqwest v0.11.9
[INFO] [stderr]   Downloaded mdns-sd v0.2.2
[INFO] [stderr]   Downloaded tracing-core v0.1.22
[INFO] [stderr]   Downloaded tracing v0.1.30
[INFO] [stderr]   Downloaded h2 v0.3.11
[INFO] [stderr]   Downloaded libc v0.2.118
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f0ea707fa1a10f8eb55544f6ed0bec89bda243c09428fd93788f99361faf8850
[INFO] running `Command { std: "docker" "start" "-a" "f0ea707fa1a10f8eb55544f6ed0bec89bda243c09428fd93788f99361faf8850", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0ea707fa1a10f8eb55544f6ed0bec89bda243c09428fd93788f99361faf8850", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0ea707fa1a10f8eb55544f6ed0bec89bda243c09428fd93788f99361faf8850", kill_on_drop: false }`
[INFO] [stdout] f0ea707fa1a10f8eb55544f6ed0bec89bda243c09428fd93788f99361faf8850
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7181935207520d846f179cb71b26af29aff1af8c3774123152034f9f107231c
[INFO] running `Command { std: "docker" "start" "-a" "a7181935207520d846f179cb71b26af29aff1af8c3774123152034f9f107231c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking tracing-core v0.1.22
[INFO] [stderr]     Checking once_cell v1.9.0
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling httparse v1.6.0
[INFO] [stderr]     Checking tinyvec v1.5.1
[INFO] [stderr]     Checking tracing v0.1.30
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]    Compiling encoding_rs v0.8.30
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking socket2 v0.4.4
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[INFO] [stderr]     Checking assert_approx_eq v1.1.0
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[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling serde_repr v0.1.7
[INFO] [stderr]     Checking mdns-sd v0.2.2
[INFO] [stderr]     Checking tokio v1.16.1
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking serde v1.0.136
[INFO] [stderr]     Checking tokio-util v0.6.9
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
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[INFO] [stderr]     Checking serde_json v1.0.79
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking hyper v0.14.17
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.9
[INFO] [stderr]     Checking huehue v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/discover.rs:38:51
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...                   info.get_addresses().iter().for_each(|ip| drop(ips.insert(ip.to_std())))
[INFO] [stdout]    |                                                                 ^^^^^-----------------------^
[INFO] [stdout]    |                                                                      |
[INFO] [stdout]    |                                                                      argument has type `bool`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/discover.rs:38:51
[INFO] [stdout]    |
[INFO] [stdout] 38 | ...                   info.get_addresses().iter().for_each(|ip| drop(ips.insert(ip.to_std())))
[INFO] [stdout]    |                                                                 ^^^^^-----------------------^
[INFO] [stdout]    |                                                                      |
[INFO] [stdout]    |                                                                      argument has type `bool`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 26.07s
[INFO] running `Command { std: "docker" "inspect" "a7181935207520d846f179cb71b26af29aff1af8c3774123152034f9f107231c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7181935207520d846f179cb71b26af29aff1af8c3774123152034f9f107231c", kill_on_drop: false }`
[INFO] [stdout] a7181935207520d846f179cb71b26af29aff1af8c3774123152034f9f107231c