[INFO] cloning repository https://github.com/ddowl/snakers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ddowl/snakers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddowl%2Fsnakers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddowl%2Fsnakers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ee47b151509b6a55e95afb015eb80bc3e1cae70
[INFO] checking ddowl/snakers against try#e0f03aec47b100bc29555561bd62a99d1bc6aca5 for pr-86231
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddowl%2Fsnakers" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ddowl/snakers on toolchain e0f03aec47b100bc29555561bd62a99d1bc6aca5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ddowl/snakers
[INFO] finished tweaking git repo https://github.com/ddowl/snakers
[INFO] tweaked toml for git repo https://github.com/ddowl/snakers written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/ddowl/snakers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded enumset v0.3.19
[INFO] [stderr]   Downloaded enumset_derive v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc4dcb7f12f587c2ecc662c20e5123704947e053a2df2a654d001af076982785
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fc4dcb7f12f587c2ecc662c20e5123704947e053a2df2a654d001af076982785", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc4dcb7f12f587c2ecc662c20e5123704947e053a2df2a654d001af076982785", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc4dcb7f12f587c2ecc662c20e5123704947e053a2df2a654d001af076982785", kill_on_drop: false }`
[INFO] [stdout] fc4dcb7f12f587c2ecc662c20e5123704947e053a2df2a654d001af076982785
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7a8e568051acc35bdee2ba3855ba2a2acc819ab7a04467471bfab528af1fd47
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d7a8e568051acc35bdee2ba3855ba2a2acc819ab7a04467471bfab528af1fd47", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling cc v1.0.36
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]     Checking array-macro v1.0.3
[INFO] [stderr]     Checking xi-unicode v0.1.0
[INFO] [stderr]     Checking unicode-segmentation v1.2.1
[INFO] [stderr]     Checking hashbrown v0.2.2
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.29
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking enum-map-internals v0.1.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]    Compiling enumset_derive v0.3.2
[INFO] [stderr]    Compiling enum-map-derive v0.4.1
[INFO] [stderr]     Checking toml v0.5.0
[INFO] [stderr]     Checking enum-map v0.5.0
[INFO] [stderr]     Checking enumset v0.3.19
[INFO] [stderr]     Checking cursive v0.11.2
[INFO] [stderr]     Checking snakers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.99s
[INFO] running `Command { std: "docker" "inspect" "d7a8e568051acc35bdee2ba3855ba2a2acc819ab7a04467471bfab528af1fd47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7a8e568051acc35bdee2ba3855ba2a2acc819ab7a04467471bfab528af1fd47", kill_on_drop: false }`
[INFO] [stdout] d7a8e568051acc35bdee2ba3855ba2a2acc819ab7a04467471bfab528af1fd47