[INFO] fetching crate rain-lang 0.0.1...
[INFO] documenting rain-lang-0.0.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate rain-lang 0.0.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate rain-lang 0.0.1 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 crates.io crate rain-lang 0.0.1
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate rain-lang 0.0.1
[INFO] tweaked toml for crates.io crate rain-lang 0.0.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate rain-lang 0.0.1 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dashmap v3.11.1
[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] 3a690b721b8d07aaac1b3813a44c93702395bae386b4870bb328aa24c2f0dd8c
[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" "3a690b721b8d07aaac1b3813a44c93702395bae386b4870bb328aa24c2f0dd8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a690b721b8d07aaac1b3813a44c93702395bae386b4870bb328aa24c2f0dd8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a690b721b8d07aaac1b3813a44c93702395bae386b4870bb328aa24c2f0dd8c", kill_on_drop: false }`
[INFO] [stdout] 3a690b721b8d07aaac1b3813a44c93702395bae386b4870bb328aa24c2f0dd8c
[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] [stdout] 58e1b8418cb6bc79548a44cb8ddbf18d22a6de92f6b960ec572b033e0f17a670
[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" "58e1b8418cb6bc79548a44cb8ddbf18d22a6de92f6b960ec572b033e0f17a670", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling lexical-core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]     Checking ahash v0.3.3
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking dashmap v3.11.1
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking nom v5.1.1
[INFO] [stderr]  Documenting rain-lang v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(weak_into_raw)]
[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 `rain-lang`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name rain_lang src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="indexmap"' --cfg 'feature="nom"' --cfg 'feature="parser"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern ahash=/opt/rustwide/target/debug/deps/libahash-cddc050ec722b5d3.rmeta --extern dashmap=/opt/rustwide/target/debug/deps/libdashmap-9a3e00adb36e7a9e.rmeta --extern either=/opt/rustwide/target/debug/deps/libeither-c77042c908435a24.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-f7b1d1fb29023446.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-db88f49d9e5662e7.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-562bc13deb5b2f9b.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-ab633469a852aeba.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-31d96e3f99263a95.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a4716f71bf79fc7d.rmeta --extern rand_xoshiro=/opt/rustwide/target/debug/deps/librand_xoshiro-6a1b7dbe245389e9.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-3b8e1ae20a7b9874.rmeta --cap-lints=warn --crate-version 0.0.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "58e1b8418cb6bc79548a44cb8ddbf18d22a6de92f6b960ec572b033e0f17a670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58e1b8418cb6bc79548a44cb8ddbf18d22a6de92f6b960ec572b033e0f17a670", kill_on_drop: false }`
[INFO] [stdout] 58e1b8418cb6bc79548a44cb8ddbf18d22a6de92f6b960ec572b033e0f17a670