[INFO] fetching crate cvar 0.2.2...
[INFO] checking cvar-0.2.2 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate cvar 0.2.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate cvar 0.2.2 on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cvar 0.2.2
[INFO] finished tweaking crates.io crate cvar 0.2.2
[INFO] tweaked toml for crates.io crate cvar 0.2.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate cvar 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6a6fb86327bb752596914626e1aaed4231a0d9e22d6892f746e6e08ee116d044
[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" "6a6fb86327bb752596914626e1aaed4231a0d9e22d6892f746e6e08ee116d044", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a6fb86327bb752596914626e1aaed4231a0d9e22d6892f746e6e08ee116d044", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a6fb86327bb752596914626e1aaed4231a0d9e22d6892f746e6e08ee116d044", kill_on_drop: false }`
[INFO] [stdout] 6a6fb86327bb752596914626e1aaed4231a0d9e22d6892f746e6e08ee116d044
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "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] 4b95edd48e1a6964d9e30f71fc16af127c06ad889e21084c75f0c7b5f5cbe013
[INFO] running `Command { std: "docker" "start" "-a" "4b95edd48e1a6964d9e30f71fc16af127c06ad889e21084c75f0c7b5f5cbe013", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking cvar v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "4b95edd48e1a6964d9e30f71fc16af127c06ad889e21084c75f0c7b5f5cbe013", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b95edd48e1a6964d9e30f71fc16af127c06ad889e21084c75f0c7b5f5cbe013", kill_on_drop: false }`
[INFO] [stdout] 4b95edd48e1a6964d9e30f71fc16af127c06ad889e21084c75f0c7b5f5cbe013