[INFO] fetching crate pumpkindb_mio_server 0.2.0...
[INFO] documenting pumpkindb_mio_server-0.2.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate pumpkindb_mio_server 0.2.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate pumpkindb_mio_server 0.2.0 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 pumpkindb_mio_server 0.2.0
[INFO] finished tweaking crates.io crate pumpkindb_mio_server 0.2.0
[INFO] tweaked toml for crates.io crate pumpkindb_mio_server 0.2.0 written to /workspace/builds/worker-5/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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 9215cc8601a3eea1349b80d7cf1ef135b712c25304847c8931951ba1f872cd82
[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" "9215cc8601a3eea1349b80d7cf1ef135b712c25304847c8931951ba1f872cd82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9215cc8601a3eea1349b80d7cf1ef135b712c25304847c8931951ba1f872cd82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9215cc8601a3eea1349b80d7cf1ef135b712c25304847c8931951ba1f872cd82", kill_on_drop: false }`
[INFO] [stdout] 9215cc8601a3eea1349b80d7cf1ef135b712c25304847c8931951ba1f872cd82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 32fb9f1631f8e93018b1f27c38a58bef42e4ed10a4427a03877e8f68e0fff59b
[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" "32fb9f1631f8e93018b1f27c38a58bef42e4ed10a4427a03877e8f68e0fff59b", kill_on_drop: false }`
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking hex-slice v0.1.4
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]     Checking toml v0.2.1
[INFO] [stderr]     Checking toml v0.3.2
[INFO] [stderr]     Checking memmap v0.5.2
[INFO] [stderr]     Checking serde_bytes v0.10.5
[INFO] [stderr]     Checking liblmdb-sys v0.2.2
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.2
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking uuid v0.4.0
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]     Checking ordered-float v0.4.0
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking suppositions v0.1.4
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking lmdb-zero v0.4.4
[INFO] [stderr]     Checking serde-value v0.4.1
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking serde_cbor v0.6.1
[INFO] [stderr]     Checking hybrid-clocks v0.3.4
[INFO] [stderr]    Compiling serde_derive v0.9.15
[INFO] [stderr]     Checking serde_yaml v0.6.2
[INFO] [stderr]     Checking config v0.3.1
[INFO] [stderr]     Checking pumpkinscript v0.2.0
[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/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 stable 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] [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] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pumpkinscript-0.2.0/src/lib.rs:61:1
[INFO] [stdout]    |
[INFO] [stdout] 61 | #![feature(try_from)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "32fb9f1631f8e93018b1f27c38a58bef42e4ed10a4427a03877e8f68e0fff59b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32fb9f1631f8e93018b1f27c38a58bef42e4ed10a4427a03877e8f68e0fff59b", kill_on_drop: false }`
[INFO] [stdout] 32fb9f1631f8e93018b1f27c38a58bef42e4ed10a4427a03877e8f68e0fff59b