[INFO] fetching crate mail 0.7.0...
[INFO] documenting mail-0.7.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate mail 0.7.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate mail 0.7.0 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 mail 0.7.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mail 0.7.0
[INFO] tweaked toml for crates.io crate mail 0.7.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate mail 0.7.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 7441450d0366af7b79d187251461930a2ea8134d8e54ffd276eb372fd2392e8e
[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" "7441450d0366af7b79d187251461930a2ea8134d8e54ffd276eb372fd2392e8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7441450d0366af7b79d187251461930a2ea8134d8e54ffd276eb372fd2392e8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7441450d0366af7b79d187251461930a2ea8134d8e54ffd276eb372fd2392e8e", kill_on_drop: false }`
[INFO] [stdout] 7441450d0366af7b79d187251461930a2ea8134d8e54ffd276eb372fd2392e8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 79f889224e5e569ee97996d91d54a2352f01dbfba4ca7d07a3d4fe2f533980d0
[INFO] running `Command { std: "docker" "start" "-a" "79f889224e5e569ee97996d91d54a2352f01dbfba4ca7d07a3d4fe2f533980d0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]     Checking quoted-string v0.6.1
[INFO] [stderr]     Checking vec-drain-where v1.0.1
[INFO] [stderr]     Checking quoted_printable v0.4.2
[INFO] [stderr]    Compiling checked_command v0.2.2
[INFO] [stderr]     Checking soft-ascii-string v1.1.0
[INFO] [stderr]     Checking maybe-owned v0.3.4
[INFO] [stderr]     Checking lut v0.1.0-unstable
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking total-order-multi-map v0.4.6
[INFO] [stderr]     Checking media-type-impl-utils v0.3.0-unstable
[INFO] [stderr]     Checking media-type v0.4.0-unstable
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking vec1 v1.5.0
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking mail-internals v0.2.3
[INFO] [stderr]     Checking mail-headers v0.6.6
[INFO] [stderr]     Checking mail-core v0.6.2
[INFO] [stderr]     Checking mail-template v0.6.1
[INFO] [stderr]  Documenting mail v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.71s
[INFO] running `Command { std: "docker" "inspect" "79f889224e5e569ee97996d91d54a2352f01dbfba4ca7d07a3d4fe2f533980d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79f889224e5e569ee97996d91d54a2352f01dbfba4ca7d07a3d4fe2f533980d0", kill_on_drop: false }`
[INFO] [stdout] 79f889224e5e569ee97996d91d54a2352f01dbfba4ca7d07a3d4fe2f533980d0