[INFO] updating cached repository https://github.com/rust-lang-nursery/mdBook
[INFO] running `"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"`
[INFO] [stderr] From https://github.com/rust-lang-nursery/mdBook
[INFO] [stderr]  + 09760b3...d37e659 gh-pages   -> gh-pages  (forced update)
[INFO] [stderr]    fcf2d7a..d5535d1  master     -> master
[INFO] [stderr]  * [new tag]         v0.3.3     -> v0.3.3
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d5535d1226d3340c1246d434bfcacff9abef034b
[INFO] checking rust-lang-nursery/mdBook against try#ba14a92a10441c4b839ce71e6ef5f7a48bbff18f for prs-64470-and-65389
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-lang-nursery%2FmdBook" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-lang-nursery/mdBook on toolchain ba14a92a10441c4b839ce71e6ef5f7a48bbff18f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-6/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 `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "/opt/rustwide/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 64cf40f59a5d8d07a85ed57253f58aac98afe7e54bf0190f4090e131c55ad233
[INFO] running `"docker" "start" "-a" "64cf40f59a5d8d07a85ed57253f58aac98afe7e54bf0190f4090e131c55ad233"`
[INFO] [stderr]     Checking gitignore v1.0.6
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking pulldown-cmark v0.5.3
[INFO] [stderr]    Compiling darling_core v0.8.6
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]    Compiling html5ever v0.23.0
[INFO] [stderr]     Checking error-chain v0.12.1
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]     Checking notify v4.0.13
[INFO] [stderr]     Checking ws v0.9.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking mime_guess v1.8.7
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]     Checking iron v0.6.1
[INFO] [stderr]    Compiling darling_macro v0.8.6
[INFO] [stderr]     Checking mount v0.4.0
[INFO] [stderr]    Compiling pest_generator v2.1.1
[INFO] [stderr]     Checking staticfile v0.5.0
[INFO] [stderr]    Compiling darling v0.8.6
[INFO] [stderr]    Compiling toml-query_derive v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking handlebars v2.0.2
[INFO] [stderr]     Checking toml-query v0.9.2
[INFO] [stderr]    Compiling markup5ever v0.9.0
[INFO] [stderr]    Compiling markup5ever v0.8.1
[INFO] [stderr]     Checking elasticlunr-rs v2.3.6
[INFO] [stderr]     Checking html5ever v0.24.0
[INFO] [stderr]     Checking select v0.4.3
[INFO] [stderr]     Checking ammonia v3.0.0
[INFO] [stderr]     Checking mdbook v0.3.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 16s
[INFO] running `"docker" "inspect" "64cf40f59a5d8d07a85ed57253f58aac98afe7e54bf0190f4090e131c55ad233"`
[INFO] running `"docker" "rm" "-f" "64cf40f59a5d8d07a85ed57253f58aac98afe7e54bf0190f4090e131c55ad233"`
[INFO] [stdout] 64cf40f59a5d8d07a85ed57253f58aac98afe7e54bf0190f4090e131c55ad233