[INFO] cloning repository https://github.com/Robbepop/non-pdsl-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Robbepop/non-pdsl-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobbepop%2Fnon-pdsl-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobbepop%2Fnon-pdsl-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 91dded334b5b0dd4064be6d402e7b5694c7cffe1
[INFO] documenting Robbepop/non-pdsl-example 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%2FRobbepop%2Fnon-pdsl-example" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Robbepop/non-pdsl-example 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] removed /workspace/builds/worker-13/source/.cargo/config
[INFO] started tweaking git repo https://github.com/Robbepop/non-pdsl-example
[INFO] finished tweaking git repo https://github.com/Robbepop/non-pdsl-example
[INFO] tweaked toml for git repo https://github.com/Robbepop/non-pdsl-example written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Robbepop/non-pdsl-example 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-crate v0.1.3
[INFO] [stderr]   Downloaded parity-codec-derive v3.3.0
[INFO] [stderr]   Downloaded serde v1.0.90
[INFO] [stderr]   Downloaded memory_units v0.4.0
[INFO] [stderr]   Downloaded parity-codec v3.4.0
[INFO] [stderr]   Downloaded wee_alloc v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2ec91f7651facf9ab046edfb476e6f055c4c455c21bb36cec9348f63c162832f
[INFO] running `Command { std: "docker" "start" "-a" "2ec91f7651facf9ab046edfb476e6f055c4c455c21bb36cec9348f63c162832f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ec91f7651facf9ab046edfb476e6f055c4c455c21bb36cec9348f63c162832f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ec91f7651facf9ab046edfb476e6f055c4c455c21bb36cec9348f63c162832f", kill_on_drop: false }`
[INFO] [stdout] 2ec91f7651facf9ab046edfb476e6f055c4c455c21bb36cec9348f63c162832f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] f2f409f9e6a73a38892bb580427c061ff482f6508696306c482eb6a0da5cc4e4
[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" "f2f409f9e6a73a38892bb580427c061ff482f6508696306c482eb6a0da5cc4e4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling wee_alloc v0.4.3
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling proc-macro-crate v0.1.3
[INFO] [stderr]    Compiling parity-codec-derive v3.3.0
[INFO] [stderr]     Checking parity-codec v3.4.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/parity-codec-3.4.0/src/lib.rs:20:35
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![cfg_attr(not(feature = "std"), feature(alloc))]
[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 `parity-codec`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "f2f409f9e6a73a38892bb580427c061ff482f6508696306c482eb6a0da5cc4e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2f409f9e6a73a38892bb580427c061ff482f6508696306c482eb6a0da5cc4e4", kill_on_drop: false }`
[INFO] [stdout] f2f409f9e6a73a38892bb580427c061ff482f6508696306c482eb6a0da5cc4e4