[INFO] fetching crate treemux 0.6.1...
[INFO] documenting treemux-0.6.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate treemux 0.6.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate treemux 0.6.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate treemux 0.6.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate treemux 0.6.1
[INFO] tweaked toml for crates.io crate treemux 0.6.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate treemux 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-executor v0.3.12
[INFO] [stderr]   Downloaded once_cell v1.5.2
[INFO] [stderr]   Downloaded futures v0.3.12
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[INFO] [stderr]   Downloaded tokio-util v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 282951b1a853d5535a822f034a25a2458b52c82722b122d63530d6447d673efe
[INFO] running `Command { std: "docker" "start" "-a" "282951b1a853d5535a822f034a25a2458b52c82722b122d63530d6447d673efe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "282951b1a853d5535a822f034a25a2458b52c82722b122d63530d6447d673efe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "282951b1a853d5535a822f034a25a2458b52c82722b122d63530d6447d673efe", kill_on_drop: false }`
[INFO] [stdout] 282951b1a853d5535a822f034a25a2458b52c82722b122d63530d6447d673efe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5cafdb86343c64a5d3982d3c962106c22cf6d44db589cfc8afbec91cd7adb442
[INFO] running `Command { std: "docker" "start" "-a" "5cafdb86343c64a5d3982d3c962106c22cf6d44db589cfc8afbec91cd7adb442", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.83
[INFO] [stderr]     Checking tower-layer v0.3.1
[INFO] [stderr]    Compiling tokio v1.1.0
[INFO] [stderr]     Checking futures-task v0.3.12
[INFO] [stderr]     Checking futures-channel v0.3.12
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]    Compiling tokio-macros v1.0.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling pin-project-internal v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking mio v0.7.7
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking flate2 v1.0.19
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking thiserror v1.0.23
[INFO] [stderr]     Checking pin-project v1.0.4
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking futures-executor v0.3.12
[INFO] [stderr]     Checking futures v0.3.12
[INFO] [stderr]     Checking tokio-stream v0.1.2
[INFO] [stderr]     Checking tokio-util v0.6.2
[INFO] [stderr]     Checking h2 v0.3.0
[INFO] [stderr]     Checking hyper v0.14.2
[INFO] [stderr]  Documenting treemux v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `tracing`
[INFO] [stdout]  --> src/middlewares.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{error, info, trace, warn};
[INFO] [stdout]   |     ^^^^^^^ use of undeclared crate or module `tracing`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the macro `trace`
[INFO] [stdout]   --> src/middlewares.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     trace!("begin processing request");
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the macro `info`
[INFO] [stdout]   --> src/middlewares.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             info!(
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the macro `warn`
[INFO] [stdout]   --> src/middlewares.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |             warn!(
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot determine resolution for the macro `error`
[INFO] [stdout]   --> src/middlewares.rs:55:11
[INFO] [stdout]    |
[INFO] [stdout] 55 |           error!("{}", e);
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `treemux`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name treemux src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-2bb0455753a8f12d.rmeta --extern flate2=/opt/rustwide/target/debug/deps/libflate2-f3aa306e8c55f158.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-c9605007c7c50149.rmeta --extern futures_util=/opt/rustwide/target/debug/deps/libfutures_util-76ddb9577980bef0.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-7ae91ea33bb902b8.rmeta --extern percent_encoding=/opt/rustwide/target/debug/deps/libpercent_encoding-ede8fd58102f5c41.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-3d2a950c90c38b64.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-c961721c0ae2c64d.rmeta --extern tower_layer=/opt/rustwide/target/debug/deps/libtower_layer-828168f9b7bc4b18.rmeta --extern tower_service=/opt/rustwide/target/debug/deps/libtower_service-a0a4e5123e4681da.rmeta --cap-lints=warn --crate-version 0.6.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5cafdb86343c64a5d3982d3c962106c22cf6d44db589cfc8afbec91cd7adb442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cafdb86343c64a5d3982d3c962106c22cf6d44db589cfc8afbec91cd7adb442", kill_on_drop: false }`
[INFO] [stdout] 5cafdb86343c64a5d3982d3c962106c22cf6d44db589cfc8afbec91cd7adb442
