[INFO] updating cached repository https://github.com/rust-lang-nursery/mdBook
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] [stderr] From https://github.com/rust-lang-nursery/mdBook
[INFO] [stderr]    4e16d96..8746206  master     -> master
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8746206060960dc9e0e6c1d122976af64883fe43
[INFO] checking rust-lang-nursery/mdBook against master#1557fb031b272b4c5bfcc7de5df7eddc7b36a584 for pr-73166
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-lang-nursery%2FmdBook" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-lang-nursery/mdBook on toolchain 1557fb031b272b4c5bfcc7de5df7eddc7b36a584
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rust-lang-nursery/mdBook
[INFO] finished tweaking git repo https://github.com/rust-lang-nursery/mdBook
[INFO] tweaked toml for git repo https://github.com/rust-lang-nursery/mdBook written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-lang-nursery/mdBook already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "fetch" "--locked" "--manifest-path" "Cargo.toml", 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] 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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3f3f01252a0b2842d9fc00d0a7789f298f1aecd71b005dafb38ecb13986316d
[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" "a3f3f01252a0b2842d9fc00d0a7789f298f1aecd71b005dafb38ecb13986316d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3f3f01252a0b2842d9fc00d0a7789f298f1aecd71b005dafb38ecb13986316d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3f3f01252a0b2842d9fc00d0a7789f298f1aecd71b005dafb38ecb13986316d", kill_on_drop: false }`
[INFO] [stdout] a3f3f01252a0b2842d9fc00d0a7789f298f1aecd71b005dafb38ecb13986316d
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c41aa32113555585ce3ec2e2995ff8f3200ea17d5c6eb3b4af49c27aa20b6c02
[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" "c41aa32113555585ce3ec2e2995ff8f3200ea17d5c6eb3b4af49c27aa20b6c02", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
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[INFO] [stderr]     Checking input_buffer v0.3.1
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[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking rand_chacha v0.2.2
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[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]    Compiling pest_meta v2.1.3
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[INFO] [stderr]     Checking rand v0.7.3
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[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.9
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling strum_macros v0.16.0
[INFO] [stderr]     Checking handlebars v3.0.1
[INFO] [stderr]     Checking tokio v0.2.18
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[INFO] [stderr]     Checking pin-project v0.4.9
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking h2 v0.2.4
[INFO] [stderr]     Checking tokio-tungstenite v0.10.1
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking elasticlunr-rs v2.3.8
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[INFO] [stderr]     Checking warp v0.2.2
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[INFO] [stderr]     Checking ammonia v3.1.0
[INFO] [stderr]     Checking select v0.5.0
[INFO] [stderr]     Checking mdbook v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 01s
[INFO] running `Command { std: "docker" "inspect" "c41aa32113555585ce3ec2e2995ff8f3200ea17d5c6eb3b4af49c27aa20b6c02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c41aa32113555585ce3ec2e2995ff8f3200ea17d5c6eb3b4af49c27aa20b6c02", kill_on_drop: false }`
[INFO] [stdout] c41aa32113555585ce3ec2e2995ff8f3200ea17d5c6eb3b4af49c27aa20b6c02