[INFO] cloning repository https://github.com/michaelb/rust-jupyter-client
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaelb/rust-jupyter-client" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelb%2Frust-jupyter-client", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelb%2Frust-jupyter-client'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3e9c939df3fbe99e81bd8a4e4161e5f5fbfa1bcd
[INFO] checking michaelb/rust-jupyter-client against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelb%2Frust-jupyter-client" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michaelb/rust-jupyter-client on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/michaelb/rust-jupyter-client
[INFO] finished tweaking git repo https://github.com/michaelb/rust-jupyter-client
[INFO] tweaked toml for git repo https://github.com/michaelb/rust-jupyter-client written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/michaelb/rust-jupyter-client already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded opaque-debug v0.2.1
[INFO] [stderr]   Downloaded hmac v0.7.0
[INFO] [stderr]   Downloaded block-padding v0.1.2
[INFO] [stderr]   Downloaded structopt-derive v0.2.13
[INFO] [stderr]   Downloaded structopt v0.2.13
[INFO] [stderr]   Downloaded byte-tools v0.3.0
[INFO] running `Command { std: "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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "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] babfa7095fb92841c347da213bbe34c9f143b8af7a648c9d46de164fc8c6b7a3
[INFO] running `Command { std: "docker" "start" "-a" "babfa7095fb92841c347da213bbe34c9f143b8af7a648c9d46de164fc8c6b7a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "babfa7095fb92841c347da213bbe34c9f143b8af7a648c9d46de164fc8c6b7a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "babfa7095fb92841c347da213bbe34c9f143b8af7a648c9d46de164fc8c6b7a3", kill_on_drop: false }`
[INFO] [stdout] babfa7095fb92841c347da213bbe34c9f143b8af7a648c9d46de164fc8c6b7a3
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75893e5252e941c195536be8248200ec0be75a379953ae0448b229c0f5a42d1f
[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" "75893e5252e941c195536be8248200ec0be75a379953ae0448b229c0f5a42d1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking byte-tools v0.3.0
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking opaque-debug v0.2.1
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking dirs v1.0.4
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking block-padding v0.1.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling metadeps v1.1.2
[INFO] [stderr]     Checking regex-syntax v0.6.3
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling quote v0.6.9
[INFO] [stderr]    Compiling zmq-sys v0.8.2
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking generic-array v0.12.0
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]    Compiling zmq v0.8.2
[INFO] [stderr]     Checking digest v0.8.0
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking block-buffer v0.7.0
[INFO] [stderr]     Checking hmac v0.7.0
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling structopt-derive v0.2.13
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking structopt v0.2.13
[INFO] [stderr]     Checking jupyter-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `json` is imported redundantly
[INFO] [stdout]    --> src/wire.rs:296:13
[INFO] [stdout]     |
[INFO] [stdout] 209 |     use serde_json::json;
[INFO] [stdout]     |         ---------------- the item `json` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 296 |         use serde_json::json;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: missing documentation for macro
[INFO] [stdout]   --> src/test_helpers.rs:41:1
[INFO] [stdout]    |
[INFO] [stdout] 41 | macro_rules! compare_bytestrings {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:1:9
[INFO] [stdout]    |
[INFO] [stdout] 1  | #![deny(missing_docs)]
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jupyter-client` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "75893e5252e941c195536be8248200ec0be75a379953ae0448b229c0f5a42d1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75893e5252e941c195536be8248200ec0be75a379953ae0448b229c0f5a42d1f", kill_on_drop: false }`
[INFO] [stdout] 75893e5252e941c195536be8248200ec0be75a379953ae0448b229c0f5a42d1f