[INFO] cloning repository https://github.com/amimoto/swampyer-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amimoto/swampyer-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famimoto%2Fswampyer-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famimoto%2Fswampyer-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 617c39c28dff28a1b66d5abaf3db690759697f49
[INFO] documenting amimoto/swampyer-rs against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famimoto%2Fswampyer-rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amimoto/swampyer-rs on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/amimoto/swampyer-rs
[INFO] finished tweaking git repo https://github.com/amimoto/swampyer-rs
[INFO] tweaked toml for git repo https://github.com/amimoto/swampyer-rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/amimoto/swampyer-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded minicbor v0.18.0
[INFO] [stderr]   Downloaded polling v2.5.1
[INFO] [stderr]   Downloaded minicbor-derive v0.12.0
[INFO] [stderr]   Downloaded cap v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 529eb8feaf7db8180a524d93d0d20a701c37442002b65adb990cd99c4441837e
[INFO] running `Command { std: "docker" "start" "-a" "529eb8feaf7db8180a524d93d0d20a701c37442002b65adb990cd99c4441837e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "529eb8feaf7db8180a524d93d0d20a701c37442002b65adb990cd99c4441837e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "529eb8feaf7db8180a524d93d0d20a701c37442002b65adb990cd99c4441837e", kill_on_drop: false }`
[INFO] [stdout] 529eb8feaf7db8180a524d93d0d20a701c37442002b65adb990cd99c4441837e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2a7a9bcfbfedd59e0894d0058a50f5cebe6d07ab0811783bf4921050d6b278b
[INFO] running `Command { std: "docker" "start" "-a" "d2a7a9bcfbfedd59e0894d0058a50f5cebe6d07ab0811783bf4921050d6b278b", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]     Checking futures-io v0.3.25
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling polling v2.5.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking concurrent-queue v2.0.0
[INFO] [stderr]    Compiling async-io v1.12.0
[INFO] [stderr]     Checking async-task v4.3.0
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking async-channel v1.8.0
[INFO] [stderr]    Compiling async-fs v1.6.0
[INFO] [stderr]    Compiling async-net v1.7.0
[INFO] [stderr]    Compiling async-process v1.6.0
[INFO] [stderr]    Compiling minicbor v0.18.0
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]     Checking async-lock v2.6.0
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking cap v0.1.1
[INFO] [stderr]     Checking bytes v1.3.0
[INFO] [stderr]    Compiling paste v1.0.9
[INFO] [stderr]     Checking blocking v1.3.0
[INFO] [stderr]     Checking async-executor v1.5.0
[INFO] [stderr]     Checking smol v1.3.0
[INFO] [stderr]    Compiling darling_core v0.14.2
[INFO] [stderr]    Compiling minicbor-derive v0.12.0
[INFO] [stderr]    Compiling swampyer_derive v0.1.0 (/opt/rustwide/workdir/swampyer_derive)
[INFO] [stderr]    Compiling darling_macro v0.14.2
[INFO] [stderr]    Compiling darling v0.14.2
[INFO] [stderr]    Compiling derive_builder_core v0.11.2
[INFO] [stderr]    Compiling derive_builder_macro v0.11.2
[INFO] [stderr]     Checking derive_builder v0.11.2
[INFO] [stderr]     Checking swampyer v0.1.0 (/opt/rustwide/workdir/swampyer)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> swampyer/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(trace_macros)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `swampyer` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d2a7a9bcfbfedd59e0894d0058a50f5cebe6d07ab0811783bf4921050d6b278b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2a7a9bcfbfedd59e0894d0058a50f5cebe6d07ab0811783bf4921050d6b278b", kill_on_drop: false }`
[INFO] [stdout] d2a7a9bcfbfedd59e0894d0058a50f5cebe6d07ab0811783bf4921050d6b278b
