[INFO] fetching crate cubox 0.2.0...
[INFO] checking cubox-0.2.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate cubox 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate cubox 0.2.0 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 cubox 0.2.0
[INFO] finished tweaking crates.io crate cubox 0.2.0
[INFO] tweaked toml for crates.io crate cubox 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate cubox 0.2.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redox_users v0.4.0
[INFO] [stderr]   Downloaded dirs-sys v0.3.6
[INFO] [stderr]   Downloaded http-body v0.4.3
[INFO] [stderr]   Downloaded security-framework v2.4.2
[INFO] [stderr]   Downloaded tracing-core v0.1.20
[INFO] [stderr]   Downloaded tracing v0.1.28
[INFO] [stderr]   Downloaded h2 v0.3.4
[INFO] [stderr]   Downloaded hyper v0.14.13
[INFO] [stderr]   Downloaded libc v0.2.102
[INFO] [stderr]   Downloaded openssl v0.10.36
[INFO] [stderr]   Downloaded syn v1.0.76
[INFO] [stderr]   Downloaded bumpalo v3.7.1
[INFO] [stderr]   Downloaded openssl-sys v0.9.67
[INFO] [stderr]   Downloaded unicode-bidi v0.3.6
[INFO] [stderr]   Downloaded tinyvec v1.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b1facc73f2c5e83411902ddf0bfc0370c44a31d6d046cb4c5598c3f9ed559144
[INFO] running `Command { std: "docker" "start" "-a" "b1facc73f2c5e83411902ddf0bfc0370c44a31d6d046cb4c5598c3f9ed559144", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1facc73f2c5e83411902ddf0bfc0370c44a31d6d046cb4c5598c3f9ed559144", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1facc73f2c5e83411902ddf0bfc0370c44a31d6d046cb4c5598c3f9ed559144", kill_on_drop: false }`
[INFO] [stdout] b1facc73f2c5e83411902ddf0bfc0370c44a31d6d046cb4c5598c3f9ed559144
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 876b0dc3280a2bce46fee0434a5dfa3c20f487a4eaa3125c25427f609a98fa68
[INFO] running `Command { std: "docker" "start" "-a" "876b0dc3280a2bce46fee0434a5dfa3c20f487a4eaa3125c25427f609a98fa68", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling tokio v1.12.0
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]     Checking tracing-core v0.1.20
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking http v0.2.5
[INFO] [stderr]     Checking futures-sink v0.3.17
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]     Checking futures-io v0.3.17
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]     Checking tinyvec v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking openssl-probe v0.1.4
[INFO] [stderr]     Checking tracing v0.1.28
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]     Checking httpdate v1.0.1
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]     Checking unicode-bidi v0.3.6
[INFO] [stderr]     Checking ipnet v2.3.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling openssl-sys v0.9.67
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking dirs-sys v0.3.6
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking http-body v0.4.3
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking tokio-util v0.6.8
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.3.4
[INFO] [stderr]     Checking hyper v0.14.13
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking reqwest v0.11.4
[INFO] [stderr]     Checking cubox v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `reqwest` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use reqwest;
[INFO] [stdout]   |     ^^^^^^^ the item `reqwest` 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 `reqwest` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use reqwest;
[INFO] [stdout]   |     ^^^^^^^ the item `reqwest` 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 7.82s
[INFO] running `Command { std: "docker" "inspect" "876b0dc3280a2bce46fee0434a5dfa3c20f487a4eaa3125c25427f609a98fa68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "876b0dc3280a2bce46fee0434a5dfa3c20f487a4eaa3125c25427f609a98fa68", kill_on_drop: false }`
[INFO] [stdout] 876b0dc3280a2bce46fee0434a5dfa3c20f487a4eaa3125c25427f609a98fa68