[INFO] fetching crate iomrascalai 0.1.7...
[INFO] testing iomrascalai-0.1.7 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate iomrascalai 0.1.7 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate iomrascalai 0.1.7 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 iomrascalai 0.1.7
[INFO] finished tweaking crates.io crate iomrascalai 0.1.7
[INFO] tweaked toml for crates.io crate iomrascalai 0.1.7 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d1850abc11e84c88f0fb4b33039929277030f3215dae14553e37faac37593931
[INFO] running `Command { std: "docker" "start" "-a" "d1850abc11e84c88f0fb4b33039929277030f3215dae14553e37faac37593931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1850abc11e84c88f0fb4b33039929277030f3215dae14553e37faac37593931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1850abc11e84c88f0fb4b33039929277030f3215dae14553e37faac37593931", kill_on_drop: false }`
[INFO] [stdout] d1850abc11e84c88f0fb4b33039929277030f3215dae14553e37faac37593931
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6739784d7aa45450e1915b8a6a5df6e9b65e7471fc70bd8da1ccf669caacdc78
[INFO] running `Command { std: "docker" "start" "-a" "6739784d7aa45450e1915b8a6a5df6e9b65e7471fc70bd8da1ccf669caacdc78", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling ucd-util v0.1.8
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling time v0.3.9
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num v0.4.0
[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/regex-0.2.11/src/lib.rs:522:42
[INFO] [stdout]     |
[INFO] [stdout] 522 | #![cfg_attr(feature = "pattern", feature(pattern))]
[INFO] [stdout]     |                                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling strenum v0.0.6
[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 `regex` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6739784d7aa45450e1915b8a6a5df6e9b65e7471fc70bd8da1ccf669caacdc78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6739784d7aa45450e1915b8a6a5df6e9b65e7471fc70bd8da1ccf669caacdc78", kill_on_drop: false }`
[INFO] [stdout] 6739784d7aa45450e1915b8a6a5df6e9b65e7471fc70bd8da1ccf669caacdc78