[INFO] fetching crate bern-conf 0.2.0...
[INFO] documenting bern-conf-0.2.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate bern-conf 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate bern-conf 0.2.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bern-conf 0.2.0
[INFO] finished tweaking crates.io crate bern-conf 0.2.0
[INFO] tweaked toml for crates.io crate bern-conf 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bern-units v0.1.0
[INFO] [stderr]   Downloaded bern-conf-type v0.2.0
[INFO] [stderr]   Downloaded bern-arch v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 884573ff877179bb62e9a1c5f0dced851d887b6c01b2ac677dce660d6aa17ab0
[INFO] running `Command { std: "docker" "start" "-a" "884573ff877179bb62e9a1c5f0dced851d887b6c01b2ac677dce660d6aa17ab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "884573ff877179bb62e9a1c5f0dced851d887b6c01b2ac677dce660d6aa17ab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "884573ff877179bb62e9a1c5f0dced851d887b6c01b2ac677dce660d6aa17ab0", kill_on_drop: false }`
[INFO] [stdout] 884573ff877179bb62e9a1c5f0dced851d887b6c01b2ac677dce660d6aa17ab0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c04d3daf89687b4102e29efeb92ba2510967a6795fbdd7d33210f9c00f5a21a
[INFO] running `Command { std: "docker" "start" "-a" "8c04d3daf89687b4102e29efeb92ba2510967a6795fbdd7d33210f9c00f5a21a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking downcast v0.11.0
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking fragile v2.0.0
[INFO] [stderr]    Compiling bern-arch v0.3.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking predicates v2.1.5
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling mockall_derive v0.11.4
[INFO] [stderr]     Checking bern-units v0.1.0
[INFO] [stderr]     Checking mockall v0.11.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bern-arch-0.3.0/src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(naked_functions)]
[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/index.crates.io-6f17d22bba15001f/bern-arch-0.3.0/src/lib.rs:16:38
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![cfg_attr(not(target_os = "none"), feature(never_type))]
[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 `bern-arch` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "8c04d3daf89687b4102e29efeb92ba2510967a6795fbdd7d33210f9c00f5a21a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c04d3daf89687b4102e29efeb92ba2510967a6795fbdd7d33210f9c00f5a21a", kill_on_drop: false }`
[INFO] [stdout] 8c04d3daf89687b4102e29efeb92ba2510967a6795fbdd7d33210f9c00f5a21a
