[INFO] cloning repository https://github.com/fangerm/cloxrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fangerm/cloxrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffangerm%2Fcloxrs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffangerm%2Fcloxrs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e725ab89207596457d06b94cd8fc83c84521bde6
[INFO] documenting fangerm/cloxrs against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffangerm%2Fcloxrs" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fangerm/cloxrs on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fangerm/cloxrs
[INFO] finished tweaking git repo https://github.com/fangerm/cloxrs
[INFO] tweaked toml for git repo https://github.com/fangerm/cloxrs written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/fangerm/cloxrs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded string-interner v0.12.1
[INFO] [stderr]   Downloaded plain_enum v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7768aeb29ffa4b9b3fcca62e9688aff9e4f6cdb2337924c32baaef739755179
[INFO] running `Command { std: "docker" "start" "-a" "e7768aeb29ffa4b9b3fcca62e9688aff9e4f6cdb2337924c32baaef739755179", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7768aeb29ffa4b9b3fcca62e9688aff9e4f6cdb2337924c32baaef739755179", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7768aeb29ffa4b9b3fcca62e9688aff9e4f6cdb2337924c32baaef739755179", kill_on_drop: false }`
[INFO] [stdout] e7768aeb29ffa4b9b3fcca62e9688aff9e4f6cdb2337924c32baaef739755179
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 613702ae65b89dcbc0a68fe8c1d9cf6aadb39ab6a2de939247dfa2edb9bc13c3
[INFO] running `Command { std: "docker" "start" "-a" "613702ae65b89dcbc0a68fe8c1d9cf6aadb39ab6a2de939247dfa2edb9bc13c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking ahash v0.4.7
[INFO] [stderr]     Checking plain_enum v0.7.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking smol_str v0.1.17
[INFO] [stderr]    Compiling enum-methods v0.0.8
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking string-interner v0.12.1
[INFO] [stderr]  Documenting cloxrs v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_mut_refs)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_fn_fn_ptr_basics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `const_fn_fn_ptr_basics` has been stable since 1.61.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `cloxrs`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name cloxrs src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4e8f712d1b6d3c50 -L dependency=/opt/rustwide/target/debug/deps --extern either=/opt/rustwide/target/debug/deps/libeither-bfd18a3a5464db9f.rmeta --extern enum_methods=/opt/rustwide/target/debug/deps/libenum_methods-67655215366d3a88.so --extern plain_enum=/opt/rustwide/target/debug/deps/libplain_enum-7f595527dfacb6a7.rmeta --extern rustc_hash=/opt/rustwide/target/debug/deps/librustc_hash-924c1058892d9908.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-acc0254b38163c5b.rmeta --extern smol_str=/opt/rustwide/target/debug/deps/libsmol_str-75982b3d94bc223f.rmeta --extern string_interner=/opt/rustwide/target/debug/deps/libstring_interner-a1357bbbff307b4b.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "613702ae65b89dcbc0a68fe8c1d9cf6aadb39ab6a2de939247dfa2edb9bc13c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "613702ae65b89dcbc0a68fe8c1d9cf6aadb39ab6a2de939247dfa2edb9bc13c3", kill_on_drop: false }`
[INFO] [stdout] 613702ae65b89dcbc0a68fe8c1d9cf6aadb39ab6a2de939247dfa2edb9bc13c3