[INFO] fetching crate notes 0.2.108...
[INFO] documenting notes-0.2.108 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate notes 0.2.108 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate notes 0.2.108 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 notes 0.2.108
[INFO] finished tweaking crates.io crate notes 0.2.108
[INFO] tweaked toml for crates.io crate notes 0.2.108 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate notes 0.2.108 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] c1fa2d19e005846e97184ac1442bd78ecf389ad4f6bf12be7581a7a2449639d3
[INFO] running `Command { std: "docker" "start" "-a" "c1fa2d19e005846e97184ac1442bd78ecf389ad4f6bf12be7581a7a2449639d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1fa2d19e005846e97184ac1442bd78ecf389ad4f6bf12be7581a7a2449639d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1fa2d19e005846e97184ac1442bd78ecf389ad4f6bf12be7581a7a2449639d3", kill_on_drop: false }`
[INFO] [stdout] c1fa2d19e005846e97184ac1442bd78ecf389ad4f6bf12be7581a7a2449639d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] af54a964c05185aa89be9531056e71518155276c237528a6ddbac4c1cb97a194
[INFO] running `Command { std: "docker" "start" "-a" "af54a964c05185aa89be9531056e71518155276c237528a6ddbac4c1cb97a194", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]  Documenting notes v0.2.108 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(backtrace)]
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `notes`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name notes src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-4764431df5f332c6.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-9b1d15e0003e1afb.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-a39955e348d71141.rmeta --extern dirs=/opt/rustwide/target/debug/deps/libdirs-7244808abe2d8281.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-a19d055f6ec10891.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-2e353f009133866b.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-488a09a58d82de4e.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-02dc6bfcfb89f9cc.rmeta --cap-lints=warn --crate-version 0.2.108` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "af54a964c05185aa89be9531056e71518155276c237528a6ddbac4c1cb97a194", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af54a964c05185aa89be9531056e71518155276c237528a6ddbac4c1cb97a194", kill_on_drop: false }`
[INFO] [stdout] af54a964c05185aa89be9531056e71518155276c237528a6ddbac4c1cb97a194
