[INFO] fetching crate pyn 0.2.2...
[INFO] checking pyn-0.2.2 against beta for pr-78714
[INFO] extracting crate pyn 0.2.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate pyn 0.2.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pyn 0.2.2
[INFO] finished tweaking crates.io crate pyn 0.2.2
[INFO] tweaked toml for crates.io crate pyn 0.2.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate pyn 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 21c844ca28b8441b8b4fb90e1365612d158b1b998ed92b19097cd424125f0a7e
[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" "21c844ca28b8441b8b4fb90e1365612d158b1b998ed92b19097cd424125f0a7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21c844ca28b8441b8b4fb90e1365612d158b1b998ed92b19097cd424125f0a7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21c844ca28b8441b8b4fb90e1365612d158b1b998ed92b19097cd424125f0a7e", kill_on_drop: false }`
[INFO] [stdout] 21c844ca28b8441b8b4fb90e1365612d158b1b998ed92b19097cd424125f0a7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 37d1340d106ac69f6325d771d2e30ee5b8da686e2d103b248b65229d2bbb4c19
[INFO] running `Command { std: "docker" "start" "-a" "37d1340d106ac69f6325d771d2e30ee5b8da686e2d103b248b65229d2bbb4c19", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking pyn v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.34s
[INFO] running `Command { std: "docker" "inspect" "37d1340d106ac69f6325d771d2e30ee5b8da686e2d103b248b65229d2bbb4c19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37d1340d106ac69f6325d771d2e30ee5b8da686e2d103b248b65229d2bbb4c19", kill_on_drop: false }`
[INFO] [stdout] 37d1340d106ac69f6325d771d2e30ee5b8da686e2d103b248b65229d2bbb4c19