[INFO] cloning repository https://github.com/connorwalsh/op
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/connorwalsh/op" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnorwalsh%2Fop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnorwalsh%2Fop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6a02283cbd4bf7184422c0925175f912bc57c171
[INFO] documenting connorwalsh/op against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconnorwalsh%2Fop" "/workspace/builds/worker-36/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-36/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/connorwalsh/op on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/connorwalsh/op
[INFO] finished tweaking git repo https://github.com/connorwalsh/op
[INFO] tweaked toml for git repo https://github.com/connorwalsh/op written to /workspace/builds/worker-36/source/Cargo.toml
[INFO] crate git repo https://github.com/connorwalsh/op already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rosc v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b31cea34d489f78553fb931a450a39f08855a01b12f717ea5cb1bd451a9a447a
[INFO] running `Command { std: "docker" "start" "-a" "b31cea34d489f78553fb931a450a39f08855a01b12f717ea5cb1bd451a9a447a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b31cea34d489f78553fb931a450a39f08855a01b12f717ea5cb1bd451a9a447a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b31cea34d489f78553fb931a450a39f08855a01b12f717ea5cb1bd451a9a447a", kill_on_drop: false }`
[INFO] [stdout] b31cea34d489f78553fb931a450a39f08855a01b12f717ea5cb1bd451a9a447a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab15f91c2f9a28f933ce052ca06cca7fe809313dc26c32acd422b502dcd5cd56
[INFO] running `Command { std: "docker" "start" "-a" "ab15f91c2f9a28f933ce052ca06cca7fe809313dc26c32acd422b502dcd5cd56", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]     Checking futures v0.1.28
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]     Checking tokio-sync v0.1.6
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking rosc v0.1.6
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.15
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]  Documenting op v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0252]: the name `io` is defined multiple times
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tokio::io;
[INFO] [stdout]   |     --------- previous import of the module `io` here
[INFO] [stdout] ...
[INFO] [stdout] 9 | use std::io;
[INFO] [stdout]   |     ^^^^^^^ `io` reimported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `io` must be defined only once in the type namespace of this module
[INFO] [stdout] help: you can use `as` to change the binding name of the import
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io as other_io;
[INFO] [stdout]   |     ~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0252`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `op`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name op src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=0da9bda07e72dbd4 -L dependency=/opt/rustwide/target/debug/deps --extern rosc=/opt/rustwide/target/debug/deps/librosc-ded55deb96398c99.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-25b497b250dbfd7f.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ab15f91c2f9a28f933ce052ca06cca7fe809313dc26c32acd422b502dcd5cd56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab15f91c2f9a28f933ce052ca06cca7fe809313dc26c32acd422b502dcd5cd56", kill_on_drop: false }`
[INFO] [stdout] ab15f91c2f9a28f933ce052ca06cca7fe809313dc26c32acd422b502dcd5cd56