[INFO] cloning repository https://github.com/mahidhar96/rustlings-answers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mahidhar96/rustlings-answers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmahidhar96%2Frustlings-answers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmahidhar96%2Frustlings-answers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4f63af89aa52dd7b850f0aaa41d11fb09112a361
[INFO] checking mahidhar96/rustlings-answers against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmahidhar96%2Frustlings-answers" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mahidhar96/rustlings-answers on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mahidhar96/rustlings-answers
[INFO] finished tweaking git repo https://github.com/mahidhar96/rustlings-answers
[INFO] tweaked toml for git repo https://github.com/mahidhar96/rustlings-answers written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mahidhar96/rustlings-answers 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" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 002923e5700cf509cc2bf757e7468e4960d469d026ef7442edd39c465ecf2552
[INFO] running `Command { std: "docker" "start" "-a" "002923e5700cf509cc2bf757e7468e4960d469d026ef7442edd39c465ecf2552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "002923e5700cf509cc2bf757e7468e4960d469d026ef7442edd39c465ecf2552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "002923e5700cf509cc2bf757e7468e4960d469d026ef7442edd39c465ecf2552", kill_on_drop: false }`
[INFO] [stdout] 002923e5700cf509cc2bf757e7468e4960d469d026ef7442edd39c465ecf2552
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97cf6b6c6f925d7d4130be36ea1b2d39f45a0a33a1f7ab44b10f261115174477
[INFO] running `Command { std: "docker" "start" "-a" "97cf6b6c6f925d7d4130be36ea1b2d39f45a0a33a1f7ab44b10f261115174477", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]     Checking smallvec v0.6.9
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]     Checking lock_api v0.2.0
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clicolors-control v1.0.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking same-file v1.0.4
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking inotify v0.7.0
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking walkdir v2.2.7
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking filetime v0.2.5
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking console v0.8.0
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]     Checking indicatif v0.10.3
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking rustlings v4.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.32s
[INFO] running `Command { std: "docker" "inspect" "97cf6b6c6f925d7d4130be36ea1b2d39f45a0a33a1f7ab44b10f261115174477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97cf6b6c6f925d7d4130be36ea1b2d39f45a0a33a1f7ab44b10f261115174477", kill_on_drop: false }`
[INFO] [stdout] 97cf6b6c6f925d7d4130be36ea1b2d39f45a0a33a1f7ab44b10f261115174477