[INFO] fetching crate rain-lang 0.0.1...
[INFO] documenting rain-lang-0.0.1 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate rain-lang 0.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rain-lang 0.0.1 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-4/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" "+1.46.0" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11e1f88158ac1ea8a0d572a487ae9c08b815617dd63f8f006e84d6e24e2e8419
[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" "11e1f88158ac1ea8a0d572a487ae9c08b815617dd63f8f006e84d6e24e2e8419", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11e1f88158ac1ea8a0d572a487ae9c08b815617dd63f8f006e84d6e24e2e8419", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11e1f88158ac1ea8a0d572a487ae9c08b815617dd63f8f006e84d6e24e2e8419", kill_on_drop: false }`
[INFO] [stdout] 11e1f88158ac1ea8a0d572a487ae9c08b815617dd63f8f006e84d6e24e2e8419
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] edb13a0e37123036519c70e833a4f4ba4485cf47a0bb7ba15684ca548f898a92
[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" "edb13a0e37123036519c70e833a4f4ba4485cf47a0bb7ba15684ca548f898a92", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]     Checking lock_api v0.3.3
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[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 rand v0.7.3
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]     Checking ahash v0.3.3
[INFO] [stderr]     Checking dashmap v3.11.1
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]  Documenting rain-lang v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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-231b1751739d1f55.rmeta --extern dashmap=/opt/rustwide/target/debug/deps/libdashmap-becc3393de049feb.rmeta --extern either=/opt/rustwide/target/debug/deps/libeither-9bd75207ce9b518c.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-cf23e07877d29559.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-57a7edc7f441d44c.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-bf01b1c64623ec21.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-b1f21d897be9e2f5.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-ae426e86be6259ca.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-1f0f38628e148e7d.rmeta --extern rand_xoshiro=/opt/rustwide/target/debug/deps/librand_xoshiro-b00dd5a431880618.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-93c41cec46cdaeb7.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "edb13a0e37123036519c70e833a4f4ba4485cf47a0bb7ba15684ca548f898a92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edb13a0e37123036519c70e833a4f4ba4485cf47a0bb7ba15684ca548f898a92", kill_on_drop: false }`
[INFO] [stdout] edb13a0e37123036519c70e833a4f4ba4485cf47a0bb7ba15684ca548f898a92