[INFO] cloning repository https://github.com/jbalintbiro/l3
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jbalintbiro/l3" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbalintbiro%2Fl3", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjbalintbiro%2Fl3'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 812df877f18a6646a42b7c967b8f3326f61810d7
[INFO] documenting jbalintbiro/l3 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%2Fjbalintbiro%2Fl3" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jbalintbiro/l3 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/jbalintbiro/l3
[INFO] finished tweaking git repo https://github.com/jbalintbiro/l3
[INFO] tweaked toml for git repo https://github.com/jbalintbiro/l3 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jbalintbiro/l3 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]  Downloading crates ...
[INFO] [stderr]   Downloaded gc_derive v0.3.2
[INFO] [stderr]   Downloaded gc v0.3.2
[INFO] [stderr]   Downloaded pest v1.0.0-beta.17
[INFO] [stderr]   Downloaded pest_derive v1.0.0-beta.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 17ee9d1bee493fb1a592bf6231be6b162ce2196dd48261e4fb4ff9676947150d
[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" "17ee9d1bee493fb1a592bf6231be6b162ce2196dd48261e4fb4ff9676947150d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17ee9d1bee493fb1a592bf6231be6b162ce2196dd48261e4fb4ff9676947150d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17ee9d1bee493fb1a592bf6231be6b162ce2196dd48261e4fb4ff9676947150d", kill_on_drop: false }`
[INFO] [stdout] 17ee9d1bee493fb1a592bf6231be6b162ce2196dd48261e4fb4ff9676947150d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stdout] cc6c111ea6a8d5a77c8df0d2e46e5efa7be009b373a3beb1f5c57df935e74631
[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" "cc6c111ea6a8d5a77c8df0d2e46e5efa7be009b373a3beb1f5c57df935e74631", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.34
[INFO] [stderr]    Compiling pest v1.0.0-beta.17
[INFO] [stderr]     Checking gc v0.3.2
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking clap v2.29.0
[INFO] [stderr]    Compiling gc_derive v0.3.2
[INFO] [stderr]    Compiling pest_derive v1.0.0-beta.17
[INFO] [stderr]  Documenting l3 v0.1.0-dev (/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(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `l3`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name l3 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 clap=/opt/rustwide/target/debug/deps/libclap-8141237093d56b58.rmeta --extern gc=/opt/rustwide/target/debug/deps/libgc-ba018814b0a2eb68.rmeta --extern gc_derive=/opt/rustwide/target/debug/deps/libgc_derive-be1fa5e759d7ad50.so --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-4cef34d6671a7dde.rmeta --extern pest=/opt/rustwide/target/debug/deps/libpest-0bcb5e845713ccaa.rmeta --extern pest_derive=/opt/rustwide/target/debug/deps/libpest_derive-ede1d14d4e874c67.so --cap-lints=warn --crate-version 0.1.0-dev` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "cc6c111ea6a8d5a77c8df0d2e46e5efa7be009b373a3beb1f5c57df935e74631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc6c111ea6a8d5a77c8df0d2e46e5efa7be009b373a3beb1f5c57df935e74631", kill_on_drop: false }`
[INFO] [stdout] cc6c111ea6a8d5a77c8df0d2e46e5efa7be009b373a3beb1f5c57df935e74631