[INFO] fetching crate crustacean-plugin 0.3.1...
[INFO] documenting crustacean-plugin-0.3.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate crustacean-plugin 0.3.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate crustacean-plugin 0.3.1 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 crustacean-plugin 0.3.1
[INFO] removed path dependency crustacean from crates.io crate crustacean-plugin 0.3.1
[INFO] finished tweaking crates.io crate crustacean-plugin 0.3.1
[INFO] tweaked toml for crates.io crate crustacean-plugin 0.3.1 written to /workspace/builds/worker-8/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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded easy-plugin v0.11.8
[INFO] [stderr]   Downloaded crustacean v0.3.1
[INFO] [stderr]   Downloaded clang-sys v0.13.0
[INFO] [stderr]   Downloaded clang-sys v0.11.1
[INFO] [stderr]   Downloaded synthax v0.3.6
[INFO] [stderr]   Downloaded easy-plugin-parsers v0.11.8
[INFO] [stderr]   Downloaded clang v0.14.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] d5a1cb4dc7c40370b36c7bd1d24cbeff4013e4655be97ccefe2cbd6c2cca0470
[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" "d5a1cb4dc7c40370b36c7bd1d24cbeff4013e4655be97ccefe2cbd6c2cca0470", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5a1cb4dc7c40370b36c7bd1d24cbeff4013e4655be97ccefe2cbd6c2cca0470", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5a1cb4dc7c40370b36c7bd1d24cbeff4013e4655be97ccefe2cbd6c2cca0470", kill_on_drop: false }`
[INFO] [stdout] d5a1cb4dc7c40370b36c7bd1d24cbeff4013e4655be97ccefe2cbd6c2cca0470
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] c085497d891d577605411687539adf7ba22c1691205b1ea59515f5262ea1817d
[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" "c085497d891d577605411687539adf7ba22c1691205b1ea59515f5262ea1817d", kill_on_drop: false }`
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling synthax v0.3.6
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/synthax-0.3.6/src/lib.rs:70:85
[INFO] [stdout]    |
[INFO] [stdout] 70 | #![cfg_attr(not(feature="syntex"), feature(plugin, plugin_registrar, rustc_private, quote))]
[INFO] [stdout]    |                                                                                     ^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `rustc_plugin`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/synthax-0.3.6/src/lib.rs:82:1
[INFO] [stdout]    |
[INFO] [stdout] 82 | extern crate rustc_plugin;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `synthax`.
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c085497d891d577605411687539adf7ba22c1691205b1ea59515f5262ea1817d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c085497d891d577605411687539adf7ba22c1691205b1ea59515f5262ea1817d", kill_on_drop: false }`
[INFO] [stdout] c085497d891d577605411687539adf7ba22c1691205b1ea59515f5262ea1817d