[INFO] fetching crate letter-avatar 1.3.0...
[INFO] documenting letter-avatar-1.3.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate letter-avatar 1.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate letter-avatar 1.3.0 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 letter-avatar 1.3.0
[INFO] finished tweaking crates.io crate letter-avatar 1.3.0
[INFO] tweaked toml for crates.io crate letter-avatar 1.3.0 written to /workspace/builds/worker-4/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 95416c6ca87505aa6fbaf2508a70bc7465f66f9a0b5c4e5f63eaaad1e87bbfcf
[INFO] running `Command { std: "docker" "start" "-a" "95416c6ca87505aa6fbaf2508a70bc7465f66f9a0b5c4e5f63eaaad1e87bbfcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95416c6ca87505aa6fbaf2508a70bc7465f66f9a0b5c4e5f63eaaad1e87bbfcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95416c6ca87505aa6fbaf2508a70bc7465f66f9a0b5c4e5f63eaaad1e87bbfcf", kill_on_drop: false }`
[INFO] [stdout] 95416c6ca87505aa6fbaf2508a70bc7465f66f9a0b5c4e5f63eaaad1e87bbfcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 1bbc6869bc38db7b1ba4a9a58fa30e1ca8e9144ac2e53b8dbc32d4fcff856d3d
[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" "1bbc6869bc38db7b1ba4a9a58fa30e1ca8e9144ac2e53b8dbc32d4fcff856d3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling cairo-rs v0.9.1
[INFO] [stderr]    Compiling pangocairo v0.10.0
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]    Compiling cairo-sys-rs v0.10.0
[INFO] [stderr]    Compiling pangocairo-sys v0.11.0
[INFO] [stderr]     Checking gobject-sys v0.10.0
[INFO] [stderr]     Checking pango-sys v0.10.0
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking glib v0.10.1
[INFO] [stderr]     Checking pango v0.9.1
[INFO] [stderr]  Documenting letter-avatar v1.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.98s
[INFO] running `Command { std: "docker" "inspect" "1bbc6869bc38db7b1ba4a9a58fa30e1ca8e9144ac2e53b8dbc32d4fcff856d3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bbc6869bc38db7b1ba4a9a58fa30e1ca8e9144ac2e53b8dbc32d4fcff856d3d", kill_on_drop: false }`
[INFO] [stdout] 1bbc6869bc38db7b1ba4a9a58fa30e1ca8e9144ac2e53b8dbc32d4fcff856d3d