[INFO] fetching crate deuterium_orm 0.5.0...
[INFO] documenting deuterium_orm-0.5.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate deuterium_orm 0.5.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate deuterium_orm 0.5.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate deuterium_orm 0.5.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate deuterium_orm 0.5.0
[INFO] tweaked toml for crates.io crate deuterium_orm 0.5.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 943c4538554feebe20dfe50e170b3d2c990050b07dfcd7851e7cf824d25b32e0
[INFO] running `Command { std: "docker" "start" "-a" "943c4538554feebe20dfe50e170b3d2c990050b07dfcd7851e7cf824d25b32e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "943c4538554feebe20dfe50e170b3d2c990050b07dfcd7851e7cf824d25b32e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "943c4538554feebe20dfe50e170b3d2c990050b07dfcd7851e7cf824d25b32e0", kill_on_drop: false }`
[INFO] [stdout] 943c4538554feebe20dfe50e170b3d2c990050b07dfcd7851e7cf824d25b32e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b055cecdeb0c5ef6b2842b167a0288af9e7cbdcdef7fbd8cf4df3e890aff41ab
[INFO] running `Command { std: "docker" "start" "-a" "b055cecdeb0c5ef6b2842b167a0288af9e7cbdcdef7fbd8cf4df3e890aff41ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking phf_shared v0.7.20
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking fallible-iterator v0.1.6
[INFO] [stderr]     Checking md5 v0.3.8
[INFO] [stderr]     Checking uuid v0.3.1
[INFO] [stderr]     Checking hex v0.2.0
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking futures-channel v0.3.16
[INFO] [stderr]     Checking stringprep v0.1.2
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]     Checking md-5 v0.9.1
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking num-iter v0.1.42
[INFO] [stderr]     Checking phf v0.7.20
[INFO] [stderr]     Checking enum_primitive v0.1.1
[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/regex-0.2.11/src/lib.rs:522:34
[INFO] [stdout]     |
[INFO] [stdout] 522 | #![cfg_attr(feature = "pattern", feature(pattern))]
[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: could not compile `regex`
[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" "b055cecdeb0c5ef6b2842b167a0288af9e7cbdcdef7fbd8cf4df3e890aff41ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b055cecdeb0c5ef6b2842b167a0288af9e7cbdcdef7fbd8cf4df3e890aff41ab", kill_on_drop: false }`
[INFO] [stdout] b055cecdeb0c5ef6b2842b167a0288af9e7cbdcdef7fbd8cf4df3e890aff41ab
