[INFO] fetching crate mdcat 0.21.0...
[INFO] documenting mdcat-0.21.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate mdcat 0.21.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate mdcat 0.21.0 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 mdcat 0.21.0
[INFO] finished tweaking crates.io crate mdcat 0.21.0
[INFO] tweaked toml for crates.io crate mdcat 0.21.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate mdcat 0.21.0 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] 47d6c44121fe63653e0f4b35f223efcaaf92f2ea7b01a276a13b0fd6be99149d
[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" "47d6c44121fe63653e0f4b35f223efcaaf92f2ea7b01a276a13b0fd6be99149d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47d6c44121fe63653e0f4b35f223efcaaf92f2ea7b01a276a13b0fd6be99149d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47d6c44121fe63653e0f4b35f223efcaaf92f2ea7b01a276a13b0fd6be99149d", kill_on_drop: false }`
[INFO] [stdout] 47d6c44121fe63653e0f4b35f223efcaaf92f2ea7b01a276a13b0fd6be99149d
[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] [stdout] 1841d98f65b97f3d6b524c91d246bcc715ceb3cadd79d585615ced59286e30f7
[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" "1841d98f65b97f3d6b524c91d246bcc715ceb3cadd79d585615ced59286e30f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling cc v1.0.57
[INFO] [stderr]     Checking adler v0.2.2
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]     Checking shell-words v1.0.0
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking gethostname v0.2.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]     Checking deflate v0.8.5
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking miniz_oxide v0.4.0
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]     Checking fancy-regex v0.3.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rayon v1.3.1
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking flate2 v1.0.16
[INFO] [stderr]     Checking chrono v0.4.12
[INFO] [stderr]     Checking num-iter v0.1.41
[INFO] [stderr]     Checking tiff v0.5.0
[INFO] [stderr]     Checking png v0.16.6
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]     Checking async-compression v0.3.5
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking plist v1.0.0
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking image v0.23.6
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]    Compiling mdcat v0.21.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling fehler-macros v1.0.0
[INFO] [stderr]     Checking fehler v1.0.0
[INFO] [stderr]     Checking pin-project v0.4.22
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking syntect v4.2.0
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking hyper v0.13.6
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.6
[INFO] [stderr]  Documenting mdcat v0.21.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 48s
[INFO] running `Command { std: "docker" "inspect" "1841d98f65b97f3d6b524c91d246bcc715ceb3cadd79d585615ced59286e30f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1841d98f65b97f3d6b524c91d246bcc715ceb3cadd79d585615ced59286e30f7", kill_on_drop: false }`
[INFO] [stdout] 1841d98f65b97f3d6b524c91d246bcc715ceb3cadd79d585615ced59286e30f7