[INFO] fetching crate r3_kernel 0.1.2...
[INFO] documenting r3_kernel-0.1.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate r3_kernel 0.1.2 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate r3_kernel 0.1.2 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 r3_kernel 0.1.2
[INFO] finished tweaking crates.io crate r3_kernel 0.1.2
[INFO] tweaked toml for crates.io crate r3_kernel 0.1.2 written to /workspace/builds/worker-26/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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] 64e0d345a1464636321eeb29760d8dae743c7def7306ce2263f0b70744348905
[INFO] running `Command { std: "docker" "start" "-a" "64e0d345a1464636321eeb29760d8dae743c7def7306ce2263f0b70744348905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64e0d345a1464636321eeb29760d8dae743c7def7306ce2263f0b70744348905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64e0d345a1464636321eeb29760d8dae743c7def7306ce2263f0b70744348905", kill_on_drop: false }`
[INFO] [stdout] 64e0d345a1464636321eeb29760d8dae743c7def7306ce2263f0b70744348905
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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] 18fbf4032a34d3e3bb24b09c348e36b4f59f14a2219ce3f4b76d6500353e901f
[INFO] running `Command { std: "docker" "start" "-a" "18fbf4032a34d3e3bb24b09c348e36b4f59f14a2219ce3f4b76d6500353e901f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]     Checking tokenlock v0.3.7
[INFO] [stderr]    Compiling seq-macro v0.3.0
[INFO] [stderr]     Checking elain v0.3.0
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/memoffset-0.6.5/src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     feature(const_ptr_offset_from, const_refs_to_cell)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/memoffset-0.6.5/src/lib.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |     feature(const_ptr_offset_from, const_refs_to_cell)
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memoffset` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "18fbf4032a34d3e3bb24b09c348e36b4f59f14a2219ce3f4b76d6500353e901f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18fbf4032a34d3e3bb24b09c348e36b4f59f14a2219ce3f4b76d6500353e901f", kill_on_drop: false }`
[INFO] [stdout] 18fbf4032a34d3e3bb24b09c348e36b4f59f14a2219ce3f4b76d6500353e901f