[INFO] fetching crate downwards 0.0.3...
[INFO] documenting downwards-0.0.3 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate downwards 0.0.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate downwards 0.0.3 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 downwards 0.0.3
[INFO] finished tweaking crates.io crate downwards 0.0.3
[INFO] tweaked toml for crates.io crate downwards 0.0.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5c2e27801904828847ed12c962bfe0c78edb1f5a0a9b0e4f697203d361e0a7bf
[INFO] running `Command { std: "docker" "start" "-a" "5c2e27801904828847ed12c962bfe0c78edb1f5a0a9b0e4f697203d361e0a7bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c2e27801904828847ed12c962bfe0c78edb1f5a0a9b0e4f697203d361e0a7bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c2e27801904828847ed12c962bfe0c78edb1f5a0a9b0e4f697203d361e0a7bf", kill_on_drop: false }`
[INFO] [stdout] 5c2e27801904828847ed12c962bfe0c78edb1f5a0a9b0e4f697203d361e0a7bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] fca293c3d26b4c46222b335620bd1949f1f7c000f08baf9d5481be2241fc8532
[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" "fca293c3d26b4c46222b335620bd1949f1f7c000f08baf9d5481be2241fc8532", kill_on_drop: false }`
[INFO] [stderr]     Checking downwards v0.0.1
[INFO] [stderr]     Checking downwards v0.0.2
[INFO] [stderr]  Documenting downwards v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "fca293c3d26b4c46222b335620bd1949f1f7c000f08baf9d5481be2241fc8532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fca293c3d26b4c46222b335620bd1949f1f7c000f08baf9d5481be2241fc8532", kill_on_drop: false }`
[INFO] [stdout] fca293c3d26b4c46222b335620bd1949f1f7c000f08baf9d5481be2241fc8532