[INFO] fetching crate libvirtdma 0.1.0...
[INFO] documenting libvirtdma-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate libvirtdma 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate libvirtdma 0.1.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libvirtdma 0.1.0
[INFO] finished tweaking crates.io crate libvirtdma 0.1.0
[INFO] tweaked toml for crates.io crate libvirtdma 0.1.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libproc v0.3.2
[INFO] [stderr]   Downloaded proc-maps v0.1.6
[INFO] [stderr]   Downloaded iced-x86 v1.8.0
[INFO] [stderr]   Downloaded c2rust-bitfields v0.3.0
[INFO] [stderr]   Downloaded c2rust-bitfields-derive v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 727581a28ac6a970b85339a6528fa15ebd52239db0caf2a75a442c11c62bbc45
[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" "727581a28ac6a970b85339a6528fa15ebd52239db0caf2a75a442c11c62bbc45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "727581a28ac6a970b85339a6528fa15ebd52239db0caf2a75a442c11c62bbc45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "727581a28ac6a970b85339a6528fa15ebd52239db0caf2a75a442c11c62bbc45", kill_on_drop: false }`
[INFO] [stdout] 727581a28ac6a970b85339a6528fa15ebd52239db0caf2a75a442c11c62bbc45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3957ec5db10d8725a57f165431f060a0d6a6efdf361e1587009714efdd9d44aa
[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" "3957ec5db10d8725a57f165431f060a0d6a6efdf361e1587009714efdd9d44aa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling pelite-macros v0.1.0
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking memmem v0.1.1
[INFO] [stderr]     Checking widestring v0.4.2
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]    Compiling iced-x86 v1.8.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling c2rust-bitfields-derive v0.2.1
[INFO] [stderr]     Checking term-table v1.3.0
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking proc-maps v0.1.6
[INFO] [stderr]     Checking pelite v0.8.1
[INFO] [stderr]     Checking c2rust-bitfields v0.3.0
[INFO] [stderr]  Documenting libvirtdma v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_int_pow)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(new_uninit)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `libvirtdma`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name libvirtdma src/lib.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-364c148656283980.rmeta --extern c2rust_bitfields=/opt/rustwide/target/debug/deps/libc2rust_bitfields-fe25b960e62d6512.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-0c64a102dd522780.rmeta --extern iced_x86=/opt/rustwide/target/debug/deps/libiced_x86-3e55e28a3398c679.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-389af87ce6697360.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-07b74124a1652f97.rmeta --extern memmem=/opt/rustwide/target/debug/deps/libmemmem-ca3ef2ff31dece7f.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-ba9a4ed912f7aee6.rmeta --extern pelite=/opt/rustwide/target/debug/deps/libpelite-114a6948986713b1.rmeta --extern proc_maps=/opt/rustwide/target/debug/deps/libproc_maps-011592b316842787.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-c251ca4f1be2ef5d.rmeta --extern static_assertions=/opt/rustwide/target/debug/deps/libstatic_assertions-cc8e46707ea09364.rmeta --extern term_table=/opt/rustwide/target/debug/deps/libterm_table-5363071ddcedb2b6.rmeta --extern widestring=/opt/rustwide/target/debug/deps/libwidestring-2fa80b4467a7fe0c.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "3957ec5db10d8725a57f165431f060a0d6a6efdf361e1587009714efdd9d44aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3957ec5db10d8725a57f165431f060a0d6a6efdf361e1587009714efdd9d44aa", kill_on_drop: false }`
[INFO] [stdout] 3957ec5db10d8725a57f165431f060a0d6a6efdf361e1587009714efdd9d44aa