[INFO] fetching crate powhasher 0.2.2...
[INFO] documenting powhasher-0.2.2 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate powhasher 0.2.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate powhasher 0.2.2 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 powhasher 0.2.2
[INFO] finished tweaking crates.io crate powhasher 0.2.2
[INFO] tweaked toml for crates.io crate powhasher 0.2.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 8b81291a887188ce4138cb751115821968c30b0124851b4a26a2838954a4004d
[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" "8b81291a887188ce4138cb751115821968c30b0124851b4a26a2838954a4004d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b81291a887188ce4138cb751115821968c30b0124851b4a26a2838954a4004d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b81291a887188ce4138cb751115821968c30b0124851b4a26a2838954a4004d", kill_on_drop: false }`
[INFO] [stdout] 8b81291a887188ce4138cb751115821968c30b0124851b4a26a2838954a4004d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 218d16dd37fccadbe3ee21291326a801043294daaff7011074155287959e08df
[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" "218d16dd37fccadbe3ee21291326a801043294daaff7011074155287959e08df", kill_on_drop: false }`
[INFO] [stderr]     Checking crypto-simd v0.1.1
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling hex-literal-impl v0.1.2
[INFO] [stderr]     Checking block-cipher-trait v0.6.2
[INFO] [stderr]     Checking groestl-aesni v0.2.2
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]     Checking blake-hash v0.2.0
[INFO] [stderr]     Checking core_affinity v0.5.10
[INFO] [stderr]     Checking ppv-null v0.1.2
[INFO] [stderr]     Checking ppv-lite86 v0.1.2
[INFO] [stderr]     Checking threefish-cipher v0.3.1
[INFO] [stderr]     Checking hex-literal v0.1.4
[INFO] [stderr]     Checking jh-x86_64 v0.2.2
[INFO] [stderr]     Checking skein-hash v0.3.0
[INFO] [stderr]     Checking cn-stratum v0.4.1
[INFO] [stderr]     Checking yellowsun v0.2.3
[INFO] [stderr]  Documenting powhasher v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `alloc_system`
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate alloc_system;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[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 E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `powhasher`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name powhasher 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 byteorder=/opt/rustwide/target/debug/deps/libbyteorder-cdbbc07100f440a1.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-5e80f06216331e5d.rmeta --extern cn_stratum=/opt/rustwide/target/debug/deps/libcn_stratum-ddcacb6d7b6d4665.rmeta --extern core_affinity=/opt/rustwide/target/debug/deps/libcore_affinity-3696e9c65fa0cfe5.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-2ce3bc89c43a69b6.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-958bf2a074a4960f.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-5429dd6d097468fb.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-3af9a6345491720f.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-dbda8714378e19d3.rmeta --extern yellowsun=/opt/rustwide/target/debug/deps/libyellowsun-6bd66d6e227a3e1a.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "218d16dd37fccadbe3ee21291326a801043294daaff7011074155287959e08df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "218d16dd37fccadbe3ee21291326a801043294daaff7011074155287959e08df", kill_on_drop: false }`
[INFO] [stdout] 218d16dd37fccadbe3ee21291326a801043294daaff7011074155287959e08df