[INFO] fetching crate merkle-tree-stream 0.12.1...
[INFO] documenting merkle-tree-stream-0.12.1 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate merkle-tree-stream 0.12.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate merkle-tree-stream 0.12.1 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate merkle-tree-stream 0.12.1
[INFO] finished tweaking crates.io crate merkle-tree-stream 0.12.1
[INFO] tweaked toml for crates.io crate merkle-tree-stream 0.12.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate merkle-tree-stream 0.12.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded flat-tree v5.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64db25125b1dad6b723e45b311dbe0f5720445de47e840a3053be57373327f3b
[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" "64db25125b1dad6b723e45b311dbe0f5720445de47e840a3053be57373327f3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64db25125b1dad6b723e45b311dbe0f5720445de47e840a3053be57373327f3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64db25125b1dad6b723e45b311dbe0f5720445de47e840a3053be57373327f3b", kill_on_drop: false }`
[INFO] [stdout] 64db25125b1dad6b723e45b311dbe0f5720445de47e840a3053be57373327f3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] ceae7c7b86317bed894302ff5d088f60deca6d387a61659e3b6ca5e9ed00b145
[INFO] running `Command { std: "docker" "start" "-a" "ceae7c7b86317bed894302ff5d088f60deca6d387a61659e3b6ca5e9ed00b145", kill_on_drop: false }`
[INFO] [stderr]     Checking flat-tree v5.0.0
[INFO] [stderr]  Documenting merkle-tree-stream v0.12.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `Command { std: "docker" "inspect" "ceae7c7b86317bed894302ff5d088f60deca6d387a61659e3b6ca5e9ed00b145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ceae7c7b86317bed894302ff5d088f60deca6d387a61659e3b6ca5e9ed00b145", kill_on_drop: false }`
[INFO] [stdout] ceae7c7b86317bed894302ff5d088f60deca6d387a61659e3b6ca5e9ed00b145
