[INFO] cloning repository https://github.com/Mcat12/backtrack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Mcat12/backtrack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMcat12%2Fbacktrack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMcat12%2Fbacktrack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9a37c73ecf8ae1343a37bfea66982263d88bb0e4
[INFO] checking Mcat12/backtrack against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMcat12%2Fbacktrack" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Mcat12/backtrack on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Mcat12/backtrack
[INFO] finished tweaking git repo https://github.com/Mcat12/backtrack
[INFO] tweaked toml for git repo https://github.com/Mcat12/backtrack written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Mcat12/backtrack already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87b214787f7ec811c47799e9edbc011e431d03054d17c3b79fad2541dfe0edae
[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" "87b214787f7ec811c47799e9edbc011e431d03054d17c3b79fad2541dfe0edae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87b214787f7ec811c47799e9edbc011e431d03054d17c3b79fad2541dfe0edae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87b214787f7ec811c47799e9edbc011e431d03054d17c3b79fad2541dfe0edae", kill_on_drop: false }`
[INFO] [stdout] 87b214787f7ec811c47799e9edbc011e431d03054d17c3b79fad2541dfe0edae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 29837df420d14209c0aad5f0ef1c4d9e640b4cc7d7eabcc6c8f4d92ca555cb0a
[INFO] running `Command { std: "docker" "start" "-a" "29837df420d14209c0aad5f0ef1c4d9e640b4cc7d7eabcc6c8f4d92ca555cb0a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling serde v1.0.81
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking backtrack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]     Checking criterion-plot v0.2.5
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking csv-core v0.1.4
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking itertools-num v0.1.3
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking criterion-stats v0.2.5
[INFO] [stderr]    Compiling pest_derive v1.0.8
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr]     Checking csv v1.0.2
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.81
[INFO] [stderr]     Checking handlebars v0.32.4
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking criterion v0.2.5
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 11s
[INFO] running `Command { std: "docker" "inspect" "29837df420d14209c0aad5f0ef1c4d9e640b4cc7d7eabcc6c8f4d92ca555cb0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29837df420d14209c0aad5f0ef1c4d9e640b4cc7d7eabcc6c8f4d92ca555cb0a", kill_on_drop: false }`
[INFO] [stdout] 29837df420d14209c0aad5f0ef1c4d9e640b4cc7d7eabcc6c8f4d92ca555cb0a