[INFO] fetching crate cactusref 0.2.0...
[INFO] documenting cactusref-0.2.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate cactusref 0.2.0 into /workspace/builds/worker-65/source
[INFO] validating manifest of crates.io crate cactusref 0.2.0 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 crates.io crate cactusref 0.2.0
[INFO] finished tweaking crates.io crate cactusref 0.2.0
[INFO] tweaked toml for crates.io crate cactusref 0.2.0 written to /workspace/builds/worker-65/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded version-sync v0.9.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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] 1a2e4b9c77e24971389f1cb1e87803bd29830f056114e888bd5e153937d10154
[INFO] running `Command { std: "docker" "start" "-a" "1a2e4b9c77e24971389f1cb1e87803bd29830f056114e888bd5e153937d10154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a2e4b9c77e24971389f1cb1e87803bd29830f056114e888bd5e153937d10154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a2e4b9c77e24971389f1cb1e87803bd29830f056114e888bd5e153937d10154", kill_on_drop: false }`
[INFO] [stdout] 1a2e4b9c77e24971389f1cb1e87803bd29830f056114e888bd5e153937d10154
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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] 55d3f83d7edf6eae714f5fc69e7467ba35a6f013faf051e177a875046599a932
[INFO] running `Command { std: "docker" "start" "-a" "55d3f83d7edf6eae714f5fc69e7467ba35a6f013faf051e177a875046599a932", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking hashbrown v0.12.1
[INFO] [stderr]  Documenting cactusref v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `cactusref`
[INFO] [stderr] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     allocator_api,
[INFO] [stdout] 3 | |     core_intrinsics,
[INFO] [stdout] 4 | |     dropck_eyepatch,
[INFO] [stdout] ... |
[INFO] [stdout] 7 | |     slice_ptr_get
[INFO] [stdout] 8 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name cactusref src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a14f92c1df9f138d -L dependency=/opt/rustwide/target/debug/deps --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-a0fed499d11e713e.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-11fcf639aa746c8b.rmeta --extern rustc_hash=/opt/rustwide/target/debug/deps/librustc_hash-a0066cbcb8b5af60.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "55d3f83d7edf6eae714f5fc69e7467ba35a6f013faf051e177a875046599a932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55d3f83d7edf6eae714f5fc69e7467ba35a6f013faf051e177a875046599a932", kill_on_drop: false }`
[INFO] [stdout] 55d3f83d7edf6eae714f5fc69e7467ba35a6f013faf051e177a875046599a932