[INFO] fetching crate dep-obj 0.27.1...
[INFO] testing dep-obj-0.27.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate dep-obj 0.27.1 into /workspace/builds/worker-37/source
[INFO] validating manifest of crates.io crate dep-obj 0.27.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dep-obj 0.27.1
[INFO] finished tweaking crates.io crate dep-obj 0.27.1
[INFO] tweaked toml for crates.io crate dep-obj 0.27.1 written to /workspace/builds/worker-37/source/Cargo.toml
[INFO] crate crates.io crate dep-obj 0.27.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ef0fc38f17dfe41bdc7c332309d038679c38b94cf8b1dc28500704f70d69a29
[INFO] running `Command { std: "docker" "start" "-a" "8ef0fc38f17dfe41bdc7c332309d038679c38b94cf8b1dc28500704f70d69a29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ef0fc38f17dfe41bdc7c332309d038679c38b94cf8b1dc28500704f70d69a29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ef0fc38f17dfe41bdc7c332309d038679c38b94cf8b1dc28500704f70d69a29", kill_on_drop: false }`
[INFO] [stdout] 8ef0fc38f17dfe41bdc7c332309d038679c38b94cf8b1dc28500704f70d69a29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0558cae0ed34db95f49f1fed90c1ef6fe3f1e5dd28a50bbfd12ea98655f8003f
[INFO] running `Command { std: "docker" "start" "-a" "0558cae0ed34db95f49f1fed90c1ef6fe3f1e5dd28a50bbfd12ea98655f8003f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling generics v0.3.2
[INFO] [stderr]    Compiling panicking v0.0.1
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling downcast-rs v1.2.0
[INFO] [stderr]    Compiling macro-attr-2018 v1.1.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/memoffset-0.6.4/src/lib.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | /     feature(
[INFO] [stdout] 63 | |         const_ptr_offset_from,
[INFO] [stdout] 64 | |         const_maybe_uninit_as_ptr,
[INFO] [stdout] 65 | |         const_raw_ptr_deref,
[INFO] [stdout] 66 | |         const_refs_to_cell,
[INFO] [stdout] 67 | |     )
[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 `memoffset` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0558cae0ed34db95f49f1fed90c1ef6fe3f1e5dd28a50bbfd12ea98655f8003f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0558cae0ed34db95f49f1fed90c1ef6fe3f1e5dd28a50bbfd12ea98655f8003f", kill_on_drop: false }`
[INFO] [stdout] 0558cae0ed34db95f49f1fed90c1ef6fe3f1e5dd28a50bbfd12ea98655f8003f