[INFO] fetching crate immut_list 0.1.0...
[INFO] documenting immut_list-0.1.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate immut_list 0.1.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate immut_list 0.1.0 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 immut_list 0.1.0
[INFO] finished tweaking crates.io crate immut_list 0.1.0
[INFO] tweaked toml for crates.io crate immut_list 0.1.0 written to /workspace/builds/worker-14/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] [stderr]     Blocking waiting for file lock on package cache
[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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 09b11ef304762361edcbc100a20f016b1003ac6f9bd25e305605f775f5e2ff67
[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" "09b11ef304762361edcbc100a20f016b1003ac6f9bd25e305605f775f5e2ff67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09b11ef304762361edcbc100a20f016b1003ac6f9bd25e305605f775f5e2ff67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09b11ef304762361edcbc100a20f016b1003ac6f9bd25e305605f775f5e2ff67", kill_on_drop: false }`
[INFO] [stdout] 09b11ef304762361edcbc100a20f016b1003ac6f9bd25e305605f775f5e2ff67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 5c4b344d0c3c444936da8d6033951b3a381245c708ad203fbf1a1da0b64b3eaf
[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" "5c4b344d0c3c444936da8d6033951b3a381245c708ad203fbf1a1da0b64b3eaf", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structure_traits v0.1.12
[INFO] [stdout] error[E0432]: unresolved import `alloc::vec_deque`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/collections/vec_deque.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | use alloc::vec_deque::VecDeque;
[INFO] [stdout]   |            ^^^^^^^^^ could not find `vec_deque` in `alloc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/lib.rs:1:35
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(not(feature = "std"), feature(alloc))]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `data_structure_traits`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5c4b344d0c3c444936da8d6033951b3a381245c708ad203fbf1a1da0b64b3eaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c4b344d0c3c444936da8d6033951b3a381245c708ad203fbf1a1da0b64b3eaf", kill_on_drop: false }`
[INFO] [stdout] 5c4b344d0c3c444936da8d6033951b3a381245c708ad203fbf1a1da0b64b3eaf