[INFO] cloning repository https://github.com/BurntSushi/rust-error-handling-case-study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BurntSushi/rust-error-handling-case-study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Frust-error-handling-case-study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Frust-error-handling-case-study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8e2af66c6aa41387c578303253e6fac30b679d1d
[INFO] documenting BurntSushi/rust-error-handling-case-study against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Frust-error-handling-case-study" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BurntSushi/rust-error-handling-case-study on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BurntSushi/rust-error-handling-case-study
[INFO] finished tweaking git repo https://github.com/BurntSushi/rust-error-handling-case-study
[INFO] tweaked toml for git repo https://github.com/BurntSushi/rust-error-handling-case-study written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/BurntSushi/rust-error-handling-case-study already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 30d66754db0fa531c42159b69a9b4ca4cd3ed0b42baf69f961b5c8a8b04aa91c
[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" "30d66754db0fa531c42159b69a9b4ca4cd3ed0b42baf69f961b5c8a8b04aa91c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30d66754db0fa531c42159b69a9b4ca4cd3ed0b42baf69f961b5c8a8b04aa91c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30d66754db0fa531c42159b69a9b4ca4cd3ed0b42baf69f961b5c8a8b04aa91c", kill_on_drop: false }`
[INFO] [stdout] 30d66754db0fa531c42159b69a9b4ca4cd3ed0b42baf69f961b5c8a8b04aa91c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3be1de0b5688c4f0004c08ae3ed86f83275f69ccaada42ee886fb278905fdb0
[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" "c3be1de0b5688c4f0004c08ae3ed86f83275f69ccaada42ee886fb278905fdb0", kill_on_drop: false }`
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking strsim v0.5.2
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking kernel32-sys v0.2.2
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking docopt v0.6.86
[INFO] [stderr]     Checking csv v0.14.7
[INFO] [stderr]  Documenting city-pop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.86s
[INFO] running `Command { std: "docker" "inspect" "c3be1de0b5688c4f0004c08ae3ed86f83275f69ccaada42ee886fb278905fdb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3be1de0b5688c4f0004c08ae3ed86f83275f69ccaada42ee886fb278905fdb0", kill_on_drop: false }`
[INFO] [stdout] c3be1de0b5688c4f0004c08ae3ed86f83275f69ccaada42ee886fb278905fdb0