[INFO] cloning repository https://github.com/corocn/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/corocn/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcorocn%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcorocn%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c6c9e508a2f2e5d88bcd59c5da6d5a9b7761871c
[INFO] checking corocn/rust-playground against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcorocn%2Frust-playground" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/corocn/rust-playground 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 git repo https://github.com/corocn/rust-playground
[INFO] finished tweaking git repo https://github.com/corocn/rust-playground
[INFO] tweaked toml for git repo https://github.com/corocn/rust-playground written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/corocn/rust-playground 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 kana2phone v0.1.0
[INFO] [stderr]   Downloaded ferris-says v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 3a61504ee3bea161f51f71e6e47818232f593ffe9e60fc8acc177b067ad27525
[INFO] running `Command { std: "docker" "start" "-a" "3a61504ee3bea161f51f71e6e47818232f593ffe9e60fc8acc177b067ad27525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a61504ee3bea161f51f71e6e47818232f593ffe9e60fc8acc177b067ad27525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a61504ee3bea161f51f71e6e47818232f593ffe9e60fc8acc177b067ad27525", kill_on_drop: false }`
[INFO] [stdout] 3a61504ee3bea161f51f71e6e47818232f593ffe9e60fc8acc177b067ad27525
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] be36240e7c2a0b8cda4d477f360f1ab3d9227a63617c08784f0297a9b84a1706
[INFO] running `Command { std: "docker" "start" "-a" "be36240e7c2a0b8cda4d477f360f1ab3d9227a63617c08784f0297a9b84a1706", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.90
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking futures-core v0.3.13
[INFO] [stderr]     Checking futures-sink v0.3.13
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking futures-channel v0.3.13
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]     Checking object v0.23.0
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking futures-io v0.3.13
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking futures-task v0.3.13
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling anyhow v1.0.39
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking addr2line v0.14.1
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking smallvec v0.4.5
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking os_str_bytes v2.4.0
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]    Compiling futures-macro v0.3.13
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking ferris-says v0.2.0
[INFO] [stderr]     Checking futures-util v0.3.13
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking kana2phone v0.1.0
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking futures-executor v0.3.13
[INFO] [stderr]     Checking futures v0.3.13
[INFO] [stderr]     Checking rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::env::current_dir`
[INFO] [stdout]  --> src/linkedlist/bin/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env::current_dir;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env::current_dir`
[INFO] [stdout]  --> src/linkedlist/bin/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env::current_dir;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[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 5.54s
[INFO] running `Command { std: "docker" "inspect" "be36240e7c2a0b8cda4d477f360f1ab3d9227a63617c08784f0297a9b84a1706", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be36240e7c2a0b8cda4d477f360f1ab3d9227a63617c08784f0297a9b84a1706", kill_on_drop: false }`
[INFO] [stdout] be36240e7c2a0b8cda4d477f360f1ab3d9227a63617c08784f0297a9b84a1706