[INFO] fetching crate ron 0.6.2...
[INFO] checking ron-0.6.2 against master#31ee872db5aae4750e3da1ca4ed1523c4356947f for pr-78461
[INFO] extracting crate ron 0.6.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate ron 0.6.2 on toolchain 31ee872db5aae4750e3da1ca4ed1523c4356947f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ron 0.6.2
[INFO] finished tweaking crates.io crate ron 0.6.2
[INFO] tweaked toml for crates.io crate ron 0.6.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate ron 0.6.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6938399fefbf5f200c14d8c852e17f23ced16d4e35ff480d113e038eb109fff7
[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" "6938399fefbf5f200c14d8c852e17f23ced16d4e35ff480d113e038eb109fff7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6938399fefbf5f200c14d8c852e17f23ced16d4e35ff480d113e038eb109fff7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6938399fefbf5f200c14d8c852e17f23ced16d4e35ff480d113e038eb109fff7", kill_on_drop: false }`
[INFO] [stdout] 6938399fefbf5f200c14d8c852e17f23ced16d4e35ff480d113e038eb109fff7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91fa49adab17bd330b886668f84cde27f27bff4817ccd9ed851ca6bbd3e4be68
[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" "91fa49adab17bd330b886668f84cde27f27bff4817ccd9ed851ca6bbd3e4be68", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking base64 v0.12.0
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking serde_bytes v0.11.4
[INFO] [stderr]     Checking serde_json v1.0.17
[INFO] [stderr]     Checking ron v0.6.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.29s
[INFO] running `Command { std: "docker" "inspect" "91fa49adab17bd330b886668f84cde27f27bff4817ccd9ed851ca6bbd3e4be68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91fa49adab17bd330b886668f84cde27f27bff4817ccd9ed851ca6bbd3e4be68", kill_on_drop: false }`
[INFO] [stdout] 91fa49adab17bd330b886668f84cde27f27bff4817ccd9ed851ca6bbd3e4be68