[INFO] cloning repository https://github.com/rust-tw/book-tw
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-tw/book-tw" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-tw%2Fbook-tw", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-tw%2Fbook-tw'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ec5416dac4088b54782d3591c60aed9fe6fdd48
[INFO] checking rust-tw/book-tw against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-tw%2Fbook-tw" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-tw/book-tw on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3/source/.cargo/config
[INFO] started tweaking git repo https://github.com/rust-tw/book-tw
[INFO] finished tweaking git repo https://github.com/rust-tw/book-tw
[INFO] tweaked toml for git repo https://github.com/rust-tw/book-tw written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-tw/book-tw already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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] 5e28319e704594fc5dbe6d0f3091cda48ee93f993f888904962379b0593fbab6
[INFO] running `Command { std: "docker" "start" "-a" "5e28319e704594fc5dbe6d0f3091cda48ee93f993f888904962379b0593fbab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e28319e704594fc5dbe6d0f3091cda48ee93f993f888904962379b0593fbab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e28319e704594fc5dbe6d0f3091cda48ee93f993f888904962379b0593fbab6", kill_on_drop: false }`
[INFO] [stdout] 5e28319e704594fc5dbe6d0f3091cda48ee93f993f888904962379b0593fbab6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "RUSTFLAGS=--cap-lints=forbid" "-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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--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] baa4f2b9e2650667295030f35d1a0e1513c9abb5be21306a1ee2e9f0feaebdc8
[INFO] running `Command { std: "docker" "start" "-a" "baa4f2b9e2650667295030f35d1a0e1513c9abb5be21306a1ee2e9f0feaebdc8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.13
[INFO] [stderr]     Checking strsim v0.9.3
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking filetime v0.2.7
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking regex v1.3.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking rust-book v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.31s
[INFO] running `Command { std: "docker" "inspect" "baa4f2b9e2650667295030f35d1a0e1513c9abb5be21306a1ee2e9f0feaebdc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "baa4f2b9e2650667295030f35d1a0e1513c9abb5be21306a1ee2e9f0feaebdc8", kill_on_drop: false }`
[INFO] [stdout] baa4f2b9e2650667295030f35d1a0e1513c9abb5be21306a1ee2e9f0feaebdc8