[INFO] fetching crate pumpkindb_engine 0.2.0...
[INFO] documenting pumpkindb_engine-0.2.0 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate pumpkindb_engine 0.2.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate pumpkindb_engine 0.2.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pumpkindb_engine 0.2.0
[INFO] finished tweaking crates.io crate pumpkindb_engine 0.2.0
[INFO] tweaked toml for crates.io crate pumpkindb_engine 0.2.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-2020-10-09" "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] 72a4e450fea5538102981b7efd9618f78cf80f44e3030e3d33e44b923943a753
[INFO] running `Command { std: "docker" "start" "-a" "72a4e450fea5538102981b7efd9618f78cf80f44e3030e3d33e44b923943a753", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72a4e450fea5538102981b7efd9618f78cf80f44e3030e3d33e44b923943a753", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72a4e450fea5538102981b7efd9618f78cf80f44e3030e3d33e44b923943a753", kill_on_drop: false }`
[INFO] [stdout] 72a4e450fea5538102981b7efd9618f78cf80f44e3030e3d33e44b923943a753
[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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcbf6eafb07f5f439df6c32dceeb8e0f296b0cd94dcebbcb68576c1deba78b0a
[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" "bcbf6eafb07f5f439df6c32dceeb8e0f296b0cd94dcebbcb68576c1deba78b0a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking hex-slice v0.1.4
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]     Checking toml v0.3.2
[INFO] [stderr]     Checking config v0.3.1
[INFO] [stderr]     Checking memmap v0.5.2
[INFO] [stderr]     Checking miniz-sys v0.1.12
[INFO] [stderr]     Checking liblmdb-sys v0.2.2
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking uuid v0.4.0
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]     Checking serde_cbor v0.6.1
[INFO] [stderr]     Checking chrono v0.3.0
[INFO] [stderr]     Checking ordered-float v0.4.0
[INFO] [stderr]     Checking suppositions v0.1.4
[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/config-0.3.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drop_types_in_const)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/config-0.3.1/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(trace_macros)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking lmdb-zero v0.4.4
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking serde-value v0.4.1
[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 compile `config`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bcbf6eafb07f5f439df6c32dceeb8e0f296b0cd94dcebbcb68576c1deba78b0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcbf6eafb07f5f439df6c32dceeb8e0f296b0cd94dcebbcb68576c1deba78b0a", kill_on_drop: false }`
[INFO] [stdout] bcbf6eafb07f5f439df6c32dceeb8e0f296b0cd94dcebbcb68576c1deba78b0a
