[INFO] fetching crate dill 0.2.0...
[INFO] testing dill-0.2.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate dill 0.2.0 into /workspace/builds/worker-74/source
[INFO] validating manifest of crates.io crate dill 0.2.0 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] removed /workspace/builds/worker-74/source/rust-toolchain
[INFO] started tweaking crates.io crate dill 0.2.0
[INFO] finished tweaking crates.io crate dill 0.2.0
[INFO] tweaked toml for crates.io crate dill 0.2.0 written to /workspace/builds/worker-74/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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] 0198526f3a9d3589362f37eb3f28fe14e134728e48527da51e23a12dc2a580a5
[INFO] running `Command { std: "docker" "start" "-a" "0198526f3a9d3589362f37eb3f28fe14e134728e48527da51e23a12dc2a580a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0198526f3a9d3589362f37eb3f28fe14e134728e48527da51e23a12dc2a580a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0198526f3a9d3589362f37eb3f28fe14e134728e48527da51e23a12dc2a580a5", kill_on_drop: false }`
[INFO] [stdout] 0198526f3a9d3589362f37eb3f28fe14e134728e48527da51e23a12dc2a580a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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] 6eb3eee274ab23f595d3d337110503e7b1f5eecc2686eb29dee8c1fc5b0867d0
[INFO] running `Command { std: "docker" "start" "-a" "6eb3eee274ab23f595d3d337110503e7b1f5eecc2686eb29dee8c1fc5b0867d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling multimap v0.8.3
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling dill-impl v0.2.0
[INFO] [stderr]    Compiling dill v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(unsize)]
[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 `dill` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "6eb3eee274ab23f595d3d337110503e7b1f5eecc2686eb29dee8c1fc5b0867d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eb3eee274ab23f595d3d337110503e7b1f5eecc2686eb29dee8c1fc5b0867d0", kill_on_drop: false }`
[INFO] [stdout] 6eb3eee274ab23f595d3d337110503e7b1f5eecc2686eb29dee8c1fc5b0867d0