[INFO] cloning repository https://github.com/pigeon-working-group/serde-perf
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pigeon-working-group/serde-perf" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-working-group%2Fserde-perf", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-working-group%2Fserde-perf'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f51f0bc263632e4b03791f2b56958bed69a38bb
[INFO] documenting pigeon-working-group/serde-perf against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-working-group%2Fserde-perf" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pigeon-working-group/serde-perf on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pigeon-working-group/serde-perf
[INFO] finished tweaking git repo https://github.com/pigeon-working-group/serde-perf
[INFO] tweaked toml for git repo https://github.com/pigeon-working-group/serde-perf written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/pigeon-working-group/serde-perf already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bcbf6c23cb7c439eaeb01e2fc7f5cafac126d07fe35ac389b7aab5e785293612
[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" "bcbf6c23cb7c439eaeb01e2fc7f5cafac126d07fe35ac389b7aab5e785293612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bcbf6c23cb7c439eaeb01e2fc7f5cafac126d07fe35ac389b7aab5e785293612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcbf6c23cb7c439eaeb01e2fc7f5cafac126d07fe35ac389b7aab5e785293612", kill_on_drop: false }`
[INFO] [stdout] bcbf6c23cb7c439eaeb01e2fc7f5cafac126d07fe35ac389b7aab5e785293612
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b68dcdb3287e46325be538a5a61ab53f0c8489f5d9690f777fa8da3e92c6bf07
[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" "b68dcdb3287e46325be538a5a61ab53f0c8489f5d9690f777fa8da3e92c6bf07", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking num-traits v0.2.1
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking libc v0.2.39
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking linked-hash-map v0.5.1
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking hex v0.2.0
[INFO] [stderr]     Checking iter-read v0.1.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking hostname v0.1.4
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking rmp v0.8.7
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]    Compiling serde_derive_internals v0.19.0
[INFO] [stderr]     Checking num-bigint v0.1.43
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]     Checking serde v1.0.27
[INFO] [stderr]     Checking serde_json v1.0.11
[INFO] [stderr]     Checking bincode v1.0.0
[INFO] [stderr]     Checking serde_cbor v0.8.2
[INFO] [stderr]     Checking serde-pickle v0.4.0
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]     Checking ron v0.2.0
[INFO] [stderr]     Checking bson v0.11.1
[INFO] [stderr]  Documenting serde-perf v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.43s
[INFO] running `Command { std: "docker" "inspect" "b68dcdb3287e46325be538a5a61ab53f0c8489f5d9690f777fa8da3e92c6bf07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b68dcdb3287e46325be538a5a61ab53f0c8489f5d9690f777fa8da3e92c6bf07", kill_on_drop: false }`
[INFO] [stdout] b68dcdb3287e46325be538a5a61ab53f0c8489f5d9690f777fa8da3e92c6bf07