[INFO] fetching crate relp-bin 0.0.6...
[INFO] testing relp-bin-0.0.6 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate relp-bin 0.0.6 into /workspace/builds/worker-73/source
[INFO] validating manifest of crates.io crate relp-bin 0.0.6 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate relp-bin 0.0.6
[INFO] finished tweaking crates.io crate relp-bin 0.0.6
[INFO] tweaked toml for crates.io crate relp-bin 0.0.6 written to /workspace/builds/worker-73/source/Cargo.toml
[INFO] crate crates.io crate relp-bin 0.0.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed19f445d2f7bfdd04fb007727d81852fd7bc453c5e0d7bcec863112446c043c
[INFO] running `Command { std: "docker" "start" "-a" "ed19f445d2f7bfdd04fb007727d81852fd7bc453c5e0d7bcec863112446c043c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed19f445d2f7bfdd04fb007727d81852fd7bc453c5e0d7bcec863112446c043c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed19f445d2f7bfdd04fb007727d81852fd7bc453c5e0d7bcec863112446c043c", kill_on_drop: false }`
[INFO] [stdout] ed19f445d2f7bfdd04fb007727d81852fd7bc453c5e0d7bcec863112446c043c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b6a18ac4982327aafa5bbb4634087fdd6b40895b3ef7da504dc979e423ffcb1
[INFO] running `Command { std: "docker" "start" "-a" "9b6a18ac4982327aafa5bbb4634087fdd6b40895b3ef7da504dc979e423ffcb1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling fixedbitset v0.4.1
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling gcd v2.0.1
[INFO] [stderr]    Compiling smallvec v1.7.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling cumsum v1.0.0
[INFO] [stderr]    Compiling fifo-set v1.0.0
[INFO] [stderr]    Compiling textwrap v0.14.2
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[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/smallvec-1.7.0/src/lib.rs:82:41
[INFO] [stdout]    |
[INFO] [stdout] 82 | #![cfg_attr(feature = "specialization", feature(specialization))]
[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 `smallvec` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9b6a18ac4982327aafa5bbb4634087fdd6b40895b3ef7da504dc979e423ffcb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b6a18ac4982327aafa5bbb4634087fdd6b40895b3ef7da504dc979e423ffcb1", kill_on_drop: false }`
[INFO] [stdout] 9b6a18ac4982327aafa5bbb4634087fdd6b40895b3ef7da504dc979e423ffcb1