[INFO] cloning repository https://github.com/shs613/rustlings-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shs613/rustlings-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshs613%2Frustlings-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshs613%2Frustlings-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ba6e30a359975362e461c7856a47c6f398bd531
[INFO] checking shs613/rustlings-solutions/0ba6e30a359975362e461c7856a47c6f398bd531 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshs613%2Frustlings-solutions" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  91% (1144/1254)
Updating files:  92% (1154/1254)
Updating files:  93% (1167/1254)
Updating files:  94% (1179/1254)
Updating files:  95% (1192/1254)
Updating files:  96% (1204/1254)
Updating files:  97% (1217/1254)
Updating files:  98% (1229/1254)
Updating files:  99% (1242/1254)
Updating files: 100% (1254/1254)
Updating files: 100% (1254/1254), done.
[INFO] validating manifest of git repo https://github.com/shs613/rustlings-solutions on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shs613/rustlings-solutions
[INFO] finished tweaking git repo https://github.com/shs613/rustlings-solutions
[INFO] tweaked toml for git repo https://github.com/shs613/rustlings-solutions written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/shs613/rustlings-solutions 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded number_prefix v0.2.8
[INFO] [stderr]   Downloaded console v0.7.7
[INFO] [stderr]   Downloaded redox_syscall v0.2.6
[INFO] [stderr]   Downloaded argh_derive v0.1.4
[INFO] [stderr]   Downloaded clicolors-control v1.0.1
[INFO] [stderr]   Downloaded terminal_size v0.1.16
[INFO] [stderr]   Downloaded predicates-core v1.0.2
[INFO] [stderr]   Downloaded indicatif v0.10.3
[INFO] [stderr]   Downloaded predicates-tree v1.0.2
[INFO] [stderr]   Downloaded argh v0.1.4
[INFO] [stderr]   Downloaded notify v4.0.16
[INFO] [stderr]   Downloaded argh_shared v0.1.4
[INFO] [stderr]   Downloaded assert_cmd v0.11.1
[INFO] [stderr]   Downloaded predicates v1.0.7
[INFO] [stderr]   Downloaded termios v0.3.3
[INFO] [stderr]   Downloaded escargot v0.4.0
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 776ef8b1866a555f2873153ac571527a963c5dd5978ac7cedf1439a5485318d3
[INFO] running `Command { std: "docker" "start" "-a" "776ef8b1866a555f2873153ac571527a963c5dd5978ac7cedf1439a5485318d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "776ef8b1866a555f2873153ac571527a963c5dd5978ac7cedf1439a5485318d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "776ef8b1866a555f2873153ac571527a963c5dd5978ac7cedf1439a5485318d3", kill_on_drop: false }`
[INFO] [stdout] 776ef8b1866a555f2873153ac571527a963c5dd5978ac7cedf1439a5485318d3
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d82b27db4d523a00354357f85862422f9d602825b1fec1e265a0d5e260d5cb69
[INFO] running `Command { std: "docker" "start" "-a" "d82b27db4d523a00354357f85862422f9d602825b1fec1e265a0d5e260d5cb69", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking lock_api v0.4.3
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]    Compiling argh_shared v0.1.4
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking terminal_size v0.1.16
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]     Checking filetime v0.2.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termios v0.3.3
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking notify v4.0.16
[INFO] [stderr]     Checking regex v1.4.6
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]     Checking predicates v1.0.7
[INFO] [stderr]    Compiling argh_derive v0.1.4
[INFO] [stderr]     Checking indicatif v0.10.3
[INFO] [stderr]     Checking argh v0.1.4
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking rustlings v4.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.18s
[INFO] running `Command { std: "docker" "inspect" "d82b27db4d523a00354357f85862422f9d602825b1fec1e265a0d5e260d5cb69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d82b27db4d523a00354357f85862422f9d602825b1fec1e265a0d5e260d5cb69", kill_on_drop: false }`
[INFO] [stdout] d82b27db4d523a00354357f85862422f9d602825b1fec1e265a0d5e260d5cb69