[INFO] fetching crate kannon 0.0.2...
[INFO] documenting kannon-0.0.2 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate kannon 0.0.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate kannon 0.0.2 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 kannon 0.0.2
[INFO] finished tweaking crates.io crate kannon 0.0.2
[INFO] tweaked toml for crates.io crate kannon 0.0.2 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" "+1.75.0" "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] warning: `panic` setting is ignored for `test` profile
[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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73df8a70c4cbbbc29b6f12e637989e37ad499a3711edbb1826a82ba70e25e449
[INFO] running `Command { std: "docker" "start" "-a" "73df8a70c4cbbbc29b6f12e637989e37ad499a3711edbb1826a82ba70e25e449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73df8a70c4cbbbc29b6f12e637989e37ad499a3711edbb1826a82ba70e25e449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73df8a70c4cbbbc29b6f12e637989e37ad499a3711edbb1826a82ba70e25e449", kill_on_drop: false }`
[INFO] [stdout] 73df8a70c4cbbbc29b6f12e637989e37ad499a3711edbb1826a82ba70e25e449
[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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8cf89aeb1469996077fcffec533bae4f71e7ea9528b3bfba143d45aa87d39003
[INFO] running `Command { std: "docker" "start" "-a" "8cf89aeb1469996077fcffec533bae4f71e7ea9528b3bfba143d45aa87d39003", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking crossbeam-epoch v0.9.17
[INFO] [stderr]     Checking crossbeam-deque v0.8.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]  Documenting kannon v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(allocator_api)]
[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:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(available_concurrency)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `available_concurrency`
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(available_concurrency)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `kannon`
[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 lib --crate-name kannon src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d5e26ce18d207e56 -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam_deque=/opt/rustwide/target/debug/deps/libcrossbeam_deque-3c6b615b199b34a6.rmeta --extern crossbeam_utils=/opt/rustwide/target/debug/deps/libcrossbeam_utils-99be309635814e50.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-5d8b8ccb77a64e55.so --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-cdbd51313957a31a.rmeta --cap-lints=warn --crate-version 0.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8cf89aeb1469996077fcffec533bae4f71e7ea9528b3bfba143d45aa87d39003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cf89aeb1469996077fcffec533bae4f71e7ea9528b3bfba143d45aa87d39003", kill_on_drop: false }`
[INFO] [stdout] 8cf89aeb1469996077fcffec533bae4f71e7ea9528b3bfba143d45aa87d39003
[INFO] documenting kannon-0.0.2 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate kannon 0.0.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate kannon 0.0.2 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 kannon 0.0.2
[INFO] finished tweaking crates.io crate kannon 0.0.2
[INFO] tweaked toml for crates.io crate kannon 0.0.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "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" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e24e65b9275a7ce3c962e141cfccfe7efca5d2944e50c66925a294938f5083de
[INFO] running `Command { std: "docker" "start" "-a" "e24e65b9275a7ce3c962e141cfccfe7efca5d2944e50c66925a294938f5083de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e24e65b9275a7ce3c962e141cfccfe7efca5d2944e50c66925a294938f5083de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e24e65b9275a7ce3c962e141cfccfe7efca5d2944e50c66925a294938f5083de", kill_on_drop: false }`
[INFO] [stdout] e24e65b9275a7ce3c962e141cfccfe7efca5d2944e50c66925a294938f5083de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] a22f0dd5a83964af31fee8706901a0bc9d63eb2aa9e9ed8b6273ec18fc41cf0c
[INFO] running `Command { std: "docker" "start" "-a" "a22f0dd5a83964af31fee8706901a0bc9d63eb2aa9e9ed8b6273ec18fc41cf0c", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking crossbeam-epoch v0.9.17
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking crossbeam-deque v0.8.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]  Documenting kannon v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(allocator_api)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(available_concurrency)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `available_concurrency`
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(available_concurrency)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `kannon`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2023-12-22-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type lib --crate-name kannon src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8a683ea9209a7642 -L dependency=/opt/rustwide/target/debug/deps --extern crossbeam_deque=/opt/rustwide/target/debug/deps/libcrossbeam_deque-456c74859c4ad5fa.rmeta --extern crossbeam_utils=/opt/rustwide/target/debug/deps/libcrossbeam_utils-f485ae04f7c344d8.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-abc4f255c9df8716.so --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-e294527956cb80f2.rmeta --cap-lints=warn --crate-version 0.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a22f0dd5a83964af31fee8706901a0bc9d63eb2aa9e9ed8b6273ec18fc41cf0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a22f0dd5a83964af31fee8706901a0bc9d63eb2aa9e9ed8b6273ec18fc41cf0c", kill_on_drop: false }`
[INFO] [stdout] a22f0dd5a83964af31fee8706901a0bc9d63eb2aa9e9ed8b6273ec18fc41cf0c
