[INFO] fetching crate descent_ipopt 0.5.0...
[INFO] documenting descent_ipopt-0.5.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate descent_ipopt 0.5.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate descent_ipopt 0.5.0 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 descent_ipopt 0.5.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate descent_ipopt 0.5.0
[INFO] tweaked toml for crates.io crate descent_ipopt 0.5.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate descent_ipopt 0.5.0 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded descent_macro v0.5.0
[INFO] [stderr]   Downloaded snafu-derive v0.6.10
[INFO] [stderr]   Downloaded descent v0.5.0
[INFO] [stderr]   Downloaded snafu v0.6.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 53316696de8c1d08b3b20d1bf81d437ad063eb6373f0d698184d73df9469a131
[INFO] running `Command { std: "docker" "start" "-a" "53316696de8c1d08b3b20d1bf81d437ad063eb6373f0d698184d73df9469a131", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53316696de8c1d08b3b20d1bf81d437ad063eb6373f0d698184d73df9469a131", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53316696de8c1d08b3b20d1bf81d437ad063eb6373f0d698184d73df9469a131", kill_on_drop: false }`
[INFO] [stdout] 53316696de8c1d08b3b20d1bf81d437ad063eb6373f0d698184d73df9469a131
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 61dc68070b2dff095af7fa252e92d78c4fa31e57a16e2404041b3438b21cd2d0
[INFO] running `Command { std: "docker" "start" "-a" "61dc68070b2dff095af7fa252e92d78c4fa31e57a16e2404041b3438b21cd2d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling libc v0.2.84
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]     Checking descent v0.5.0
[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/descent-0.5.0/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(test)] // enable benchmarking
[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 `descent` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "61dc68070b2dff095af7fa252e92d78c4fa31e57a16e2404041b3438b21cd2d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61dc68070b2dff095af7fa252e92d78c4fa31e57a16e2404041b3438b21cd2d0", kill_on_drop: false }`
[INFO] [stdout] 61dc68070b2dff095af7fa252e92d78c4fa31e57a16e2404041b3438b21cd2d0
[INFO] documenting descent_ipopt-0.5.0 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate descent_ipopt 0.5.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate descent_ipopt 0.5.0 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate descent_ipopt 0.5.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate descent_ipopt 0.5.0
[INFO] tweaked toml for crates.io crate descent_ipopt 0.5.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate descent_ipopt 0.5.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 976a8b43ad50cf3f755a24bfb20ec84e7458d49a67430fa83e41216b6aa78e00
[INFO] running `Command { std: "docker" "start" "-a" "976a8b43ad50cf3f755a24bfb20ec84e7458d49a67430fa83e41216b6aa78e00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "976a8b43ad50cf3f755a24bfb20ec84e7458d49a67430fa83e41216b6aa78e00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "976a8b43ad50cf3f755a24bfb20ec84e7458d49a67430fa83e41216b6aa78e00", kill_on_drop: false }`
[INFO] [stdout] 976a8b43ad50cf3f755a24bfb20ec84e7458d49a67430fa83e41216b6aa78e00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+beta-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06b55c5211ead3df5e734a8b97cc59f6bea69a111ea1806f096ff1897be6c069
[INFO] running `Command { std: "docker" "start" "-a" "06b55c5211ead3df5e734a8b97cc59f6bea69a111ea1806f096ff1897be6c069", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling libc v0.2.84
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]     Checking descent v0.5.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/descent-0.5.0/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(test)] // enable benchmarking
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 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 `descent` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "06b55c5211ead3df5e734a8b97cc59f6bea69a111ea1806f096ff1897be6c069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06b55c5211ead3df5e734a8b97cc59f6bea69a111ea1806f096ff1897be6c069", kill_on_drop: false }`
[INFO] [stdout] 06b55c5211ead3df5e734a8b97cc59f6bea69a111ea1806f096ff1897be6c069
