[INFO] cloning repository https://github.com/letov-io/letov-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/letov-io/letov-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletov-io%2Fletov-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletov-io%2Fletov-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1d131af294ec644cc5f19c9412212f9f45b85794
[INFO] checking letov-io/letov-rs against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletov-io%2Fletov-rs" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/letov-io/letov-rs on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/letov-io/letov-rs
[INFO] finished tweaking git repo https://github.com/letov-io/letov-rs
[INFO] tweaked toml for git repo https://github.com/letov-io/letov-rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/letov-io/letov-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41991a529c83edfe7257fc9f0afb571e369da793077c2039a70e2ee43b04da77
[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" "41991a529c83edfe7257fc9f0afb571e369da793077c2039a70e2ee43b04da77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41991a529c83edfe7257fc9f0afb571e369da793077c2039a70e2ee43b04da77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41991a529c83edfe7257fc9f0afb571e369da793077c2039a70e2ee43b04da77", kill_on_drop: false }`
[INFO] [stdout] 41991a529c83edfe7257fc9f0afb571e369da793077c2039a70e2ee43b04da77
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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] 4e0fa71a6a5055e1b0156d0a32573baac6d6126980a8e089404b61a115aa35de
[INFO] running `Command { std: "docker" "start" "-a" "4e0fa71a6a5055e1b0156d0a32573baac6d6126980a8e089404b61a115aa35de", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking letov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.16s
[INFO] running `Command { std: "docker" "inspect" "4e0fa71a6a5055e1b0156d0a32573baac6d6126980a8e089404b61a115aa35de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e0fa71a6a5055e1b0156d0a32573baac6d6126980a8e089404b61a115aa35de", kill_on_drop: false }`
[INFO] [stdout] 4e0fa71a6a5055e1b0156d0a32573baac6d6126980a8e089404b61a115aa35de