[INFO] cloning repository https://github.com/csharad/papito
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/csharad/papito" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcsharad%2Fpapito", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcsharad%2Fpapito'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09beb223bf00cf303568c298346023858a62def6
[INFO] documenting csharad/papito against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcsharad%2Fpapito" "/workspace/builds/worker-58/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-58/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/csharad/papito 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 git repo https://github.com/csharad/papito
[INFO] finished tweaking git repo https://github.com/csharad/papito
[INFO] tweaked toml for git repo https://github.com/csharad/papito written to /workspace/builds/worker-58/source/Cargo.toml
[INFO] crate git repo https://github.com/csharad/papito 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]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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] 09a64487a92dd994fab2d2aa1d1b70e5a7bfc995a10837174b4c53f4ed728d69
[INFO] running `Command { std: "docker" "start" "-a" "09a64487a92dd994fab2d2aa1d1b70e5a7bfc995a10837174b4c53f4ed728d69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09a64487a92dd994fab2d2aa1d1b70e5a7bfc995a10837174b4c53f4ed728d69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09a64487a92dd994fab2d2aa1d1b70e5a7bfc995a10837174b4c53f4ed728d69", kill_on_drop: false }`
[INFO] [stdout] 09a64487a92dd994fab2d2aa1d1b70e5a7bfc995a10837174b4c53f4ed728d69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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] 608f6f2448fd12afa617b5df57a6ae1a8a09a3d0d4e2a38ac2e87a0d012b0e5e
[INFO] running `Command { std: "docker" "start" "-a" "608f6f2448fd12afa617b5df57a6ae1a8a09a3d0d4e2a38ac2e87a0d012b0e5e", kill_on_drop: false }`
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking serde v1.0.33
[INFO] [stderr]     Checking num-traits v0.2.1
[INFO] [stderr]    Compiling stdweb v0.4.2
[INFO] [stderr]     Checking futures v0.1.18
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking indexmap v1.0.0
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]     Checking heck v0.3.0
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]     Checking serde_json v1.0.11
[INFO] [stderr]  Documenting papito_codegen v0.1.1 (/opt/rustwide/workdir/papito_codegen)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> papito_codegen/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[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 `papito_codegen`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type proc-macro --crate-name papito_codegen papito_codegen/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 heck=/opt/rustwide/target/debug/deps/libheck-418cc1e62174ce8c.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-40e82472c210e5d2.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-a3624080401edf99.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-e845d5bdc3630182.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "608f6f2448fd12afa617b5df57a6ae1a8a09a3d0d4e2a38ac2e87a0d012b0e5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "608f6f2448fd12afa617b5df57a6ae1a8a09a3d0d4e2a38ac2e87a0d012b0e5e", kill_on_drop: false }`
[INFO] [stdout] 608f6f2448fd12afa617b5df57a6ae1a8a09a3d0d4e2a38ac2e87a0d012b0e5e
