[INFO] cloning repository https://github.com/foeb/buddy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/foeb/buddy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffoeb%2Fbuddy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffoeb%2Fbuddy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b0b909fde29fdb83eeb1b7eb698b7e366a5302c7
[INFO] documenting foeb/buddy against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffoeb%2Fbuddy" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/foeb/buddy on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/foeb/buddy
[INFO] finished tweaking git repo https://github.com/foeb/buddy
[INFO] tweaked toml for git repo https://github.com/foeb/buddy written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/foeb/buddy already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/foeb/legion`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8d2361be1e651954641df538dc68632f35be946274dfa5145d766bfb542e053
[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" "a8d2361be1e651954641df538dc68632f35be946274dfa5145d766bfb542e053", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8d2361be1e651954641df538dc68632f35be946274dfa5145d766bfb542e053", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8d2361be1e651954641df538dc68632f35be946274dfa5145d766bfb542e053", kill_on_drop: false }`
[INFO] [stdout] a8d2361be1e651954641df538dc68632f35be946274dfa5145d766bfb542e053
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 08b22d56f441058f02f74f93168702b478de75e747926439907dc4b7aeacbf21
[INFO] running `Command { std: "docker" "start" "-a" "08b22d56f441058f02f74f93168702b478de75e747926439907dc4b7aeacbf21", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]    Compiling sdl2 v0.33.0
[INFO] [stderr]    Compiling sdl2-sys v0.33.0
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.2
[INFO] [stderr]     Checking bit-set v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]    Compiling thiserror-impl v1.0.11
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling paste-impl v0.1.7
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking thiserror v1.0.11
[INFO] [stderr]     Checking legion-core v0.2.1 (https://github.com/foeb/legion?branch=impl_as_mut#4ae57325)
[INFO] [stderr]     Checking paste v0.1.7
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking legion-systems v0.2.1 (https://github.com/foeb/legion?branch=impl_as_mut#4ae57325)
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking legion v0.2.1 (https://github.com/foeb/legion?branch=impl_as_mut#4ae57325)
[INFO] [stderr]  Documenting buddy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax)]
[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 `buddy`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name buddy src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern legion=/opt/rustwide/target/debug/deps/liblegion-d7bce98eff29d815.rmeta --extern sdl2=/opt/rustwide/target/debug/deps/libsdl2-0517f63b456302ae.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-2616448599a4da4f.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-90247bc48b9536ff.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "08b22d56f441058f02f74f93168702b478de75e747926439907dc4b7aeacbf21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08b22d56f441058f02f74f93168702b478de75e747926439907dc4b7aeacbf21", kill_on_drop: false }`
[INFO] [stdout] 08b22d56f441058f02f74f93168702b478de75e747926439907dc4b7aeacbf21