[INFO] fetching crate ben 0.2.0...
[INFO] checking ben-0.2.0 against try#8b72f65b805cbe4c261de45030d663f524f27376 for pr-78991
[INFO] extracting crate ben 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate ben 0.2.0 on toolchain 8b72f65b805cbe4c261de45030d663f524f27376
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ben 0.2.0
[INFO] finished tweaking crates.io crate ben 0.2.0
[INFO] tweaked toml for crates.io crate ben 0.2.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate ben 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7508aa762a94840788891c8c8ac03d93a0c1c4981e9ab5ad0937a302d17cd6db
[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" "7508aa762a94840788891c8c8ac03d93a0c1c4981e9ab5ad0937a302d17cd6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7508aa762a94840788891c8c8ac03d93a0c1c4981e9ab5ad0937a302d17cd6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7508aa762a94840788891c8c8ac03d93a0c1c4981e9ab5ad0937a302d17cd6db", kill_on_drop: false }`
[INFO] [stdout] 7508aa762a94840788891c8c8ac03d93a0c1c4981e9ab5ad0937a302d17cd6db
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 523a507246e0176d2027e0462f4d4f2d60efff5b78b86095e74292cb2865898d
[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" "523a507246e0176d2027e0462f4d4f2d60efff5b78b86095e74292cb2865898d", kill_on_drop: false }`
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking ben v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "523a507246e0176d2027e0462f4d4f2d60efff5b78b86095e74292cb2865898d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "523a507246e0176d2027e0462f4d4f2d60efff5b78b86095e74292cb2865898d", kill_on_drop: false }`
[INFO] [stdout] 523a507246e0176d2027e0462f4d4f2d60efff5b78b86095e74292cb2865898d