[INFO] fetching crate gym 2.2.1...
[INFO] checking gym-2.2.1 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate gym 2.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate gym 2.2.1 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gym 2.2.1
[INFO] finished tweaking crates.io crate gym 2.2.1
[INFO] tweaked toml for crates.io crate gym 2.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate gym 2.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded python3-sys v0.4.1
[INFO] [stderr]   Downloaded cpython v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20b910aa60f86a0c141dec1addfbce45d4f662ca5286ea2128379acd806ba634
[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" "20b910aa60f86a0c141dec1addfbce45d4f662ca5286ea2128379acd806ba634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20b910aa60f86a0c141dec1addfbce45d4f662ca5286ea2128379acd806ba634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20b910aa60f86a0c141dec1addfbce45d4f662ca5286ea2128379acd806ba634", kill_on_drop: false }`
[INFO] [stdout] 20b910aa60f86a0c141dec1addfbce45d4f662ca5286ea2128379acd806ba634
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7e5b60a8d40d61e554f9632a3e58702e22f055f1094d63c4a70b33f2d71bd0e
[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" "c7e5b60a8d40d61e554f9632a3e58702e22f055f1094d63c4a70b33f2d71bd0e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling getrandom v0.1.10
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]    Compiling syn v1.0.9
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]    Compiling cpython v0.4.1
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking matrixmultiply v0.2.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]    Compiling python3-sys v0.4.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking gym v2.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.66s
[INFO] running `Command { std: "docker" "inspect" "c7e5b60a8d40d61e554f9632a3e58702e22f055f1094d63c4a70b33f2d71bd0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7e5b60a8d40d61e554f9632a3e58702e22f055f1094d63c4a70b33f2d71bd0e", kill_on_drop: false }`
[INFO] [stdout] c7e5b60a8d40d61e554f9632a3e58702e22f055f1094d63c4a70b33f2d71bd0e