[INFO] fetching crate xeno 0.1.0...
[INFO] checking xeno-0.1.0 against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104
[INFO] extracting crate xeno 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate xeno 0.1.0 on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xeno 0.1.0
[INFO] finished tweaking crates.io crate xeno 0.1.0
[INFO] tweaked toml for crates.io crate xeno 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate xeno 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", 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] 31a4e19114f820c8a525b92eae21c70e8c8ffb1aa9d38006872332f89d6cffbf
[INFO] running `Command { std: "docker" "start" "-a" "31a4e19114f820c8a525b92eae21c70e8c8ffb1aa9d38006872332f89d6cffbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31a4e19114f820c8a525b92eae21c70e8c8ffb1aa9d38006872332f89d6cffbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31a4e19114f820c8a525b92eae21c70e8c8ffb1aa9d38006872332f89d6cffbf", kill_on_drop: false }`
[INFO] [stdout] 31a4e19114f820c8a525b92eae21c70e8c8ffb1aa9d38006872332f89d6cffbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "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] 56be281122919f5f08fb0e534820f851283ba9a7e858f980b11855671df0062f
[INFO] running `Command { std: "docker" "start" "-a" "56be281122919f5f08fb0e534820f851283ba9a7e858f980b11855671df0062f", kill_on_drop: false }`
[INFO] [stderr]     Checking xeno v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "56be281122919f5f08fb0e534820f851283ba9a7e858f980b11855671df0062f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56be281122919f5f08fb0e534820f851283ba9a7e858f980b11855671df0062f", kill_on_drop: false }`
[INFO] [stdout] 56be281122919f5f08fb0e534820f851283ba9a7e858f980b11855671df0062f