[INFO] fetching crate z3d 0.1.0...
[INFO] documenting z3d-0.1.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate z3d 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate z3d 0.1.0 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 z3d 0.1.0
[INFO] finished tweaking crates.io crate z3d 0.1.0
[INFO] tweaked toml for crates.io crate z3d 0.1.0 written to /workspace/builds/worker-2-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 z3-sys v0.5.0
[INFO] [stderr]   Downloaded z3 v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] f9c0ea6741e96bcc4f8c581ff9264c58a3cf7eb0c337d68573d186af2d1edc54
[INFO] running `Command { std: "docker" "start" "-a" "f9c0ea6741e96bcc4f8c581ff9264c58a3cf7eb0c337d68573d186af2d1edc54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9c0ea6741e96bcc4f8c581ff9264c58a3cf7eb0c337d68573d186af2d1edc54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9c0ea6741e96bcc4f8c581ff9264c58a3cf7eb0c337d68573d186af2d1edc54", kill_on_drop: false }`
[INFO] [stdout] f9c0ea6741e96bcc4f8c581ff9264c58a3cf7eb0c337d68573d186af2d1edc54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6083c285744e613f9ee6c67f3f1a4c8d23af5cf6caef19ccc7dc8857aa0bba98
[INFO] running `Command { std: "docker" "start" "-a" "6083c285744e613f9ee6c67f3f1a4c8d23af5cf6caef19ccc7dc8857aa0bba98", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking z3-sys v0.5.0
[INFO] [stderr]     Checking z3 v0.4.0
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]  Documenting z3d v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_hygiene)]
[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 document `z3d`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type proc-macro --crate-name z3d src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=74d865685d9b1f96 -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-3889f6209a44556f.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-b5c91c32bf6deb64.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-8ca102cd16ff575b.rmeta --extern z3=/opt/rustwide/target/debug/deps/libz3-ec368700a7a3bb83.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "6083c285744e613f9ee6c67f3f1a4c8d23af5cf6caef19ccc7dc8857aa0bba98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6083c285744e613f9ee6c67f3f1a4c8d23af5cf6caef19ccc7dc8857aa0bba98", kill_on_drop: false }`
[INFO] [stdout] 6083c285744e613f9ee6c67f3f1a4c8d23af5cf6caef19ccc7dc8857aa0bba98
