[INFO] fetching crate gc_plugin 0.1.1...
[INFO] documenting gc_plugin-0.1.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate gc_plugin 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate gc_plugin 0.1.1 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 gc_plugin 0.1.1
[INFO] finished tweaking crates.io crate gc_plugin 0.1.1
[INFO] tweaked toml for crates.io crate gc_plugin 0.1.1 written to /workspace/builds/worker-5-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] 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3c7be99f1a33f2c7f6f2b395739cb61cd77aa25b87d2b9669b4093ad9f2ca4b1
[INFO] running `Command { std: "docker" "start" "-a" "3c7be99f1a33f2c7f6f2b395739cb61cd77aa25b87d2b9669b4093ad9f2ca4b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c7be99f1a33f2c7f6f2b395739cb61cd77aa25b87d2b9669b4093ad9f2ca4b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c7be99f1a33f2c7f6f2b395739cb61cd77aa25b87d2b9669b4093ad9f2ca4b1", kill_on_drop: false }`
[INFO] [stdout] 3c7be99f1a33f2c7f6f2b395739cb61cd77aa25b87d2b9669b4093ad9f2ca4b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 747dce2e3bfe8460bfdeb5e592bba5a93f2a91f8272b225685004a0192bd2508
[INFO] running `Command { std: "docker" "start" "-a" "747dce2e3bfe8460bfdeb5e592bba5a93f2a91f8272b225685004a0192bd2508", kill_on_drop: false }`
[INFO] [stderr]  Documenting gc_plugin v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: `box_syntax` has been removed
[INFO] [stdout]   --> src/lib.rs:25:74
[INFO] [stdout]    |
[INFO] [stdout] 25 |     reg.register_syntax_extension(intern("derive_Trace"), MultiDecorator(box expand_trace))
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `Box::new()` instead
[INFO] [stdout]    |
[INFO] [stdout] 25 |     reg.register_syntax_extension(intern("derive_Trace"), MultiDecorator(Box::new(expand_trace)))
[INFO] [stdout]    |                                                                          ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(plugin_registrar, box_syntax)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: plugins are no longer supported
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(plugin_registrar, box_syntax)]
[INFO] [stdout]   |                              ^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: replaced with `#[rustc_box]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `gc_plugin`
[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 --crate-type dylib --crate-name gc_plugin src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=69a16cdf65c5b8e0 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "747dce2e3bfe8460bfdeb5e592bba5a93f2a91f8272b225685004a0192bd2508", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "747dce2e3bfe8460bfdeb5e592bba5a93f2a91f8272b225685004a0192bd2508", kill_on_drop: false }`
[INFO] [stdout] 747dce2e3bfe8460bfdeb5e592bba5a93f2a91f8272b225685004a0192bd2508
