[INFO] fetching crate ddcore-rs 0.2.4...
[INFO] testing ddcore-rs-0.2.4 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate ddcore-rs 0.2.4 into /workspace/builds/worker-29/source
[INFO] validating manifest of crates.io crate ddcore-rs 0.2.4 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ddcore-rs 0.2.4
[INFO] finished tweaking crates.io crate ddcore-rs 0.2.4
[INFO] tweaked toml for crates.io crate ddcore-rs 0.2.4 written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] crate crates.io crate ddcore-rs 0.2.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded scan_fmt v0.2.6
[INFO] [stderr]   Downloaded sysinfo v0.23.2
[INFO] [stderr]   Downloaded aes v0.8.0
[INFO] [stderr]   Downloaded serde_json v1.0.68
[INFO] [stderr]   Downloaded bumpalo v3.7.1
[INFO] [stderr]   Downloaded http-body v0.4.3
[INFO] [stderr]   Downloaded core-foundation-sys v0.8.2
[INFO] [stderr]   Downloaded block-padding v0.3.1
[INFO] [stderr]   Downloaded bytestream v0.4.1
[INFO] [stderr]   Downloaded openssl-sys v0.9.67
[INFO] [stderr]   Downloaded inout v0.1.2
[INFO] [stderr]   Downloaded cipher v0.4.1
[INFO] [stderr]   Downloaded cbc v0.1.0
[INFO] [stderr]   Downloaded process-memory v0.4.0
[INFO] [stderr]   Downloaded h2 v0.3.6
[INFO] [stderr]   Downloaded openssl v0.10.36
[INFO] [stderr]   Downloaded pkg-config v0.3.20
[INFO] [stderr]   Downloaded anyhow v1.0.44
[INFO] [stderr]   Downloaded base32 v0.4.0
[INFO] [stderr]   Downloaded hyper v0.14.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d17dfe518a5b25bcbc2fa6d2d5d3a434abdd9ba7418c66344df62ae5838c04b
[INFO] running `Command { std: "docker" "start" "-a" "0d17dfe518a5b25bcbc2fa6d2d5d3a434abdd9ba7418c66344df62ae5838c04b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d17dfe518a5b25bcbc2fa6d2d5d3a434abdd9ba7418c66344df62ae5838c04b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d17dfe518a5b25bcbc2fa6d2d5d3a434abdd9ba7418c66344df62ae5838c04b", kill_on_drop: false }`
[INFO] [stdout] 0d17dfe518a5b25bcbc2fa6d2d5d3a434abdd9ba7418c66344df62ae5838c04b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9fd9bf20d71eb7364168d6afec0375290b29ecef365123ecd7ff0ace068da74
[INFO] running `Command { std: "docker" "start" "-a" "a9fd9bf20d71eb7364168d6afec0375290b29ecef365123ecd7ff0ace068da74", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling rle-decode-fast v1.0.1
[INFO] [stderr]    Compiling anyhow v1.0.44
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling md5 v0.7.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling bytestream v0.4.1
[INFO] [stderr]    Compiling libflate_lz77 v1.1.0
[INFO] [stderr]    Compiling libflate v1.1.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling ddcore-rs v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(io_safety)]
[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 `ddcore-rs` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a9fd9bf20d71eb7364168d6afec0375290b29ecef365123ecd7ff0ace068da74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9fd9bf20d71eb7364168d6afec0375290b29ecef365123ecd7ff0ace068da74", kill_on_drop: false }`
[INFO] [stdout] a9fd9bf20d71eb7364168d6afec0375290b29ecef365123ecd7ff0ace068da74