[INFO] fetching crate gym 2.2.1...
[INFO] checking gym-2.2.1 against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] extracting crate gym 2.2.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate gym 2.2.1 on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", 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-3/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" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", 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] e5e5bc2c8bcd3f4549dc49499cd77ff95ca6f3e29b82a5404a511d30bb04ada8
[INFO] running `Command { std: "docker" "start" "-a" "e5e5bc2c8bcd3f4549dc49499cd77ff95ca6f3e29b82a5404a511d30bb04ada8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5e5bc2c8bcd3f4549dc49499cd77ff95ca6f3e29b82a5404a511d30bb04ada8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5e5bc2c8bcd3f4549dc49499cd77ff95ca6f3e29b82a5404a511d30bb04ada8", kill_on_drop: false }`
[INFO] [stdout] e5e5bc2c8bcd3f4549dc49499cd77ff95ca6f3e29b82a5404a511d30bb04ada8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 965e2dce67a537a57ffe3fcbb2266b77c5041115b37431cdcc549fe1bb1df33b
[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" "965e2dce67a537a57ffe3fcbb2266b77c5041115b37431cdcc549fe1bb1df33b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling getrandom v0.1.10
[INFO] [stderr]    Compiling syn v1.0.9
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling cpython v0.4.1
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[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 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]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling python3-sys v0.4.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[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 52.08s
[INFO] running `Command { std: "docker" "inspect" "965e2dce67a537a57ffe3fcbb2266b77c5041115b37431cdcc549fe1bb1df33b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "965e2dce67a537a57ffe3fcbb2266b77c5041115b37431cdcc549fe1bb1df33b", kill_on_drop: false }`
[INFO] [stdout] 965e2dce67a537a57ffe3fcbb2266b77c5041115b37431cdcc549fe1bb1df33b