[INFO] cloning repository https://github.com/fallingyang/rust-lab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fallingyang/rust-lab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallingyang%2Frust-lab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallingyang%2Frust-lab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 77f3b153a7b903a373e909ddea79158f8c15d896
[INFO] checking fallingyang/rust-lab against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallingyang%2Frust-lab" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fallingyang/rust-lab on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fallingyang/rust-lab
[INFO] finished tweaking git repo https://github.com/fallingyang/rust-lab
[INFO] tweaked toml for git repo https://github.com/fallingyang/rust-lab written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/fallingyang/rust-lab already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 609cad04f764c6d321874db85235b0a8643171a228c7171b9d30dd9ac8807594
[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" "609cad04f764c6d321874db85235b0a8643171a228c7171b9d30dd9ac8807594", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "609cad04f764c6d321874db85235b0a8643171a228c7171b9d30dd9ac8807594", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "609cad04f764c6d321874db85235b0a8643171a228c7171b9d30dd9ac8807594", kill_on_drop: false }`
[INFO] [stdout] 609cad04f764c6d321874db85235b0a8643171a228c7171b9d30dd9ac8807594
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1261b39a75ceb3cb7a53a7214f13a2e5477a50d1b582b492c116a140c5f0afd8
[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" "1261b39a75ceb3cb7a53a7214f13a2e5477a50d1b582b492c116a140c5f0afd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking futures-core v0.3.14
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[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
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[INFO] [stderr]    Compiling cranelift-codegen-shared v0.67.0
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[INFO] [stderr]    Compiling num-traits v0.2.12
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[INFO] [stderr]     Checking textwrap v0.11.0
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[INFO] [stderr]     Checking directories v2.0.2
[INFO] [stderr]     Checking flate2 v1.0.19
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling cc v1.0.61
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]     Checking ordered-float v1.1.0
[INFO] [stderr]     Checking chrono v0.4.19
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[INFO] [stderr]     Checking crossbeam-epoch v0.9.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]    Compiling zstd-sys v1.4.17+zstd.1.4.5
[INFO] [stderr]    Compiling raw-cpuid v7.0.3
[INFO] [stderr]    Compiling wasmtime-runtime v0.20.0
[INFO] [stderr]    Compiling quiche v0.6.0
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking serialport v3.3.0
[INFO] [stderr]     Checking wat v1.0.27
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking webpki v0.21.3
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[INFO] [stderr]    Compiling serde_derive v1.0.117
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[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling async-stream-impl v0.2.1
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]    Compiling tokio-macros v0.3.1
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling scroll_derive v0.10.4
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]     Checking async-stream v0.2.1
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]     Checking scroll v0.10.2
[INFO] [stderr]     Checking thiserror v1.0.21
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[INFO] [stderr]     Checking tower-discover v0.3.0
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[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]    Compiling prost-types v0.6.1
[INFO] [stderr]     Checking tower-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.14
[INFO] [stderr]     Checking futures v0.3.14
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking serde_json v1.0.59
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[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking serde_yaml v0.8.14
[INFO] [stderr]     Checking serde-value v0.6.0
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking regalloc v0.0.30
[INFO] [stderr]     Checking mio v0.7.11
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[INFO] [stderr]     Checking rustls v0.18.1
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking cranelift-bforest v0.67.0
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.67.0
[INFO] [stderr]     Checking gimli v0.21.0
[INFO] [stderr]     Checking object v0.21.1
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking file-per-thread-logger v0.1.4
[INFO] [stderr]     Checking tokio v0.3.2
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking mio-serial v3.3.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.14
[INFO] [stderr]     Checking log4rs v0.10.0
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking quic-lab v0.1.0 (/opt/rustwide/workdir/quic-lab)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> quic-lab/src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | /     /// server
[INFO] [stdout] 9  | |     // let conn = quiche::accept(&scid, None, &mut config)?;
[INFO] [stdout] 10 | |     /// stats:recv=0 sent=0 lost=0 rtt=333ms cwnd=14520 delivery_rate=0
[INFO] [stdout] 11 | |     /// 往返时延(Round-Trip Time,RTT) 从发送端发送一段数据开始，到发送端收到来自接收端的确认总共经历的时延。                                    ...
[INFO] [stdout] 12 | |     /// RTT由三个部分决定：链路的传播时间，端系统的处理时间，路由器的缓存中的排队和处理时间。
[INFO] [stdout] 13 | |     /// 拥塞窗口,congestion window,cwnd,它反映了网络的拥塞情况，发送端利用拥塞窗口根据网络的拥塞情况调整数据的发送速度                                        ...
[INFO] [stdout]    | |_____-----------------------------------------------------------------------------------------------------------------^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> quic-lab/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     /// client
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 7 |     let conn = quiche::connect(Some(&server_name), &scid, &mut config)?;
[INFO] [stdout]   |     -------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> quic-lab/src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | /     /// server
[INFO] [stdout] 9  | |     // let conn = quiche::accept(&scid, None, &mut config)?;
[INFO] [stdout] 10 | |     /// stats:recv=0 sent=0 lost=0 rtt=333ms cwnd=14520 delivery_rate=0
[INFO] [stdout] 11 | |     /// 往返时延(Round-Trip Time,RTT) 从发送端发送一段数据开始，到发送端收到来自接收端的确认总共经历的时延。                                    ...
[INFO] [stdout] 12 | |     /// RTT由三个部分决定：链路的传播时间，端系统的处理时间，路由器的缓存中的排队和处理时间。
[INFO] [stdout] 13 | |     /// 拥塞窗口,congestion window,cwnd,它反映了网络的拥塞情况，发送端利用拥塞窗口根据网络的拥塞情况调整数据的发送速度                                        ...
[INFO] [stdout]    | |_____-----------------------------------------------------------------------------------------------------------------^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> quic-lab/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     /// client
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 7 |     let conn = quiche::connect(Some(&server_name), &scid, &mut config)?;
[INFO] [stdout]   |     -------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tonic-build v0.3.1
[INFO] [stderr]     Checking backtrace v0.3.53
[INFO] [stderr]    Compiling tonic-lab v0.1.0 (/opt/rustwide/workdir/tonic-lab)
[INFO] [stderr]     Checking zstd-safe v2.0.5+zstd.1.4.5
[INFO] [stderr]     Checking zstd v0.5.3+zstd.1.4.5
[INFO] [stderr]     Checking mini-redis v0.3.0
[INFO] [stderr]     Checking tower-load v0.3.0
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tower-timeout v0.3.0
[INFO] [stderr]     Checking tower-make v0.3.0
[INFO] [stderr]     Checking tower-retry v0.3.0
[INFO] [stderr]     Checking tower-buffer v0.3.0
[INFO] [stderr]     Checking tower-ready-cache v0.3.1
[INFO] [stderr]     Checking tokio-rustls v0.14.1
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-serial v4.3.3
[INFO] [stderr]     Checking rumqttc v0.2.0
[INFO] [stderr]     Checking tokio-modbus v0.4.0
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking tower-limit v0.3.1
[INFO] [stderr]     Checking tower-balance v0.3.0
[INFO] [stderr] error: failed to run custom build command for `tonic-lab v0.1.0 (/opt/rustwide/workdir/tonic-lab)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/tonic-lab-8938a88c3a6fad77/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   error: 'rustfmt' is not installed for the toolchain '6f8a6450478f69b8510c8976ab6c2a70b3b0e47c'
[INFO] [stderr]   note: this is a custom toolchain, which cannot use `rustup component add`
[INFO] [stderr]   help: if you built this toolchain from source, and used `rustup toolchain link`, then you may be able to build the component with `x.py`
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1261b39a75ceb3cb7a53a7214f13a2e5477a50d1b582b492c116a140c5f0afd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1261b39a75ceb3cb7a53a7214f13a2e5477a50d1b582b492c116a140c5f0afd8", kill_on_drop: false }`
[INFO] [stdout] 1261b39a75ceb3cb7a53a7214f13a2e5477a50d1b582b492c116a140c5f0afd8