[INFO] fetching crate rem-utils 0.1.1...
[INFO] documenting rem-utils-0.1.1 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate rem-utils 0.1.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate rem-utils 0.1.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rem-utils 0.1.1
[INFO] finished tweaking crates.io crate rem-utils 0.1.1
[INFO] tweaked toml for crates.io crate rem-utils 0.1.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ebd311375e785a5b2c18d7b3f3ff67d313a9d8ef365a564a75d4327cccb9226
[INFO] running `Command { std: "docker" "start" "-a" "3ebd311375e785a5b2c18d7b3f3ff67d313a9d8ef365a564a75d4327cccb9226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ebd311375e785a5b2c18d7b3f3ff67d313a9d8ef365a564a75d4327cccb9226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ebd311375e785a5b2c18d7b3f3ff67d313a9d8ef365a564a75d4327cccb9226", kill_on_drop: false }`
[INFO] [stdout] 3ebd311375e785a5b2c18d7b3f3ff67d313a9d8ef365a564a75d4327cccb9226
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e60148c25d0378253028725ef9d1c866f5e1234913dc67195e4085513b8cf512
[INFO] running `Command { std: "docker" "start" "-a" "e60148c25d0378253028725ef9d1c866f5e1234913dc67195e4085513b8cf512", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking siphasher v0.3.11
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking ena v0.14.2
[INFO] [stderr]     Checking home v0.5.9
[INFO] [stderr]     Checking phf_shared v0.10.0
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking string_cache v0.8.7
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]  Documenting rem-utils v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(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 2 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 `rem-utils`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name rem_utils src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=00c86657735a0f9d -L dependency=/opt/rustwide/target/debug/deps --extern ena=/opt/rustwide/target/debug/deps/libena-ef23e157f14d5299.rmeta --extern home=/opt/rustwide/target/debug/deps/libhome-0ae218272b8bd237.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-c2b9fe8f0bb60ac5.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-0f6e5cd3b113d981.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-9c94b7c7214198ea.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-61995bb319fdf437.rmeta --extern string_cache=/opt/rustwide/target/debug/deps/libstring_cache-638007c09808f2b7.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-91f8705132b0319b.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e60148c25d0378253028725ef9d1c866f5e1234913dc67195e4085513b8cf512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e60148c25d0378253028725ef9d1c866f5e1234913dc67195e4085513b8cf512", kill_on_drop: false }`
[INFO] [stdout] e60148c25d0378253028725ef9d1c866f5e1234913dc67195e4085513b8cf512
