[INFO] fetching crate json2cbor 1.0.0...
[INFO] checking json2cbor-1.0.0 against beta for pr-78714
[INFO] extracting crate json2cbor 1.0.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate json2cbor 1.0.0 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 json2cbor 1.0.0
[INFO] finished tweaking crates.io crate json2cbor 1.0.0
[INFO] tweaked toml for crates.io crate json2cbor 1.0.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] e59c4e06468c0828e10f6a0b1531ef3a1c8be50a9f4597795a2eaea7642bda5c
[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" "e59c4e06468c0828e10f6a0b1531ef3a1c8be50a9f4597795a2eaea7642bda5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e59c4e06468c0828e10f6a0b1531ef3a1c8be50a9f4597795a2eaea7642bda5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e59c4e06468c0828e10f6a0b1531ef3a1c8be50a9f4597795a2eaea7642bda5c", kill_on_drop: false }`
[INFO] [stdout] e59c4e06468c0828e10f6a0b1531ef3a1c8be50a9f4597795a2eaea7642bda5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 0bd9c1f34baab41a16efafcff5d3ba587a1db18a916219ae20a61799dc426487
[INFO] running `Command { std: "docker" "start" "-a" "0bd9c1f34baab41a16efafcff5d3ba587a1db18a916219ae20a61799dc426487", kill_on_drop: false }`
[INFO] [stderr]     Checking serde-transcode v1.1.0
[INFO] [stderr]     Checking serde_cbor v0.10.2
[INFO] [stderr]     Checking json2cbor v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "0bd9c1f34baab41a16efafcff5d3ba587a1db18a916219ae20a61799dc426487", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bd9c1f34baab41a16efafcff5d3ba587a1db18a916219ae20a61799dc426487", kill_on_drop: false }`
[INFO] [stdout] 0bd9c1f34baab41a16efafcff5d3ba587a1db18a916219ae20a61799dc426487