[INFO] fetching crate serde_var_export 0.1.0...
[INFO] documenting serde_var_export-0.1.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate serde_var_export 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate serde_var_export 0.1.0 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 crates.io crate serde_var_export 0.1.0
[INFO] finished tweaking crates.io crate serde_var_export 0.1.0
[INFO] tweaked toml for crates.io crate serde_var_export 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate serde_var_export 0.1.0 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-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f720e839a3c4b9999ff7534a2be865a2b0bff344b90bfa0b4abc2b978a2f46d1
[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" "f720e839a3c4b9999ff7534a2be865a2b0bff344b90bfa0b4abc2b978a2f46d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f720e839a3c4b9999ff7534a2be865a2b0bff344b90bfa0b4abc2b978a2f46d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f720e839a3c4b9999ff7534a2be865a2b0bff344b90bfa0b4abc2b978a2f46d1", kill_on_drop: false }`
[INFO] [stdout] f720e839a3c4b9999ff7534a2be865a2b0bff344b90bfa0b4abc2b978a2f46d1
[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" "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] 0489412aa671b5906d372f0c0e58c508616ea93f9a011b23aec6a4035e823b35
[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" "0489412aa671b5906d372f0c0e58c508616ea93f9a011b23aec6a4035e823b35", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling thiserror-impl v1.0.9
[INFO] [stderr]     Checking thiserror v1.0.9
[INFO] [stderr]  Documenting serde_var_export v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.45s
[INFO] running `Command { std: "docker" "inspect" "0489412aa671b5906d372f0c0e58c508616ea93f9a011b23aec6a4035e823b35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0489412aa671b5906d372f0c0e58c508616ea93f9a011b23aec6a4035e823b35", kill_on_drop: false }`
[INFO] [stdout] 0489412aa671b5906d372f0c0e58c508616ea93f9a011b23aec6a4035e823b35