[INFO] fetching crate ndless-handler 0.3.0...
[INFO] checking ndless-handler-0.3.0 against beta for pr-78714
[INFO] extracting crate ndless-handler 0.3.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate ndless-handler 0.3.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ndless-handler 0.3.0
[INFO] finished tweaking crates.io crate ndless-handler 0.3.0
[INFO] tweaked toml for crates.io crate ndless-handler 0.3.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cec88564f2c7ebf75b32b2c11ab228560ff0ea8790d0de18dea9e3317f56b80
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0cec88564f2c7ebf75b32b2c11ab228560ff0ea8790d0de18dea9e3317f56b80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cec88564f2c7ebf75b32b2c11ab228560ff0ea8790d0de18dea9e3317f56b80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cec88564f2c7ebf75b32b2c11ab228560ff0ea8790d0de18dea9e3317f56b80", kill_on_drop: false }`
[INFO] [stdout] 0cec88564f2c7ebf75b32b2c11ab228560ff0ea8790d0de18dea9e3317f56b80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] caa86249afa7a6aced9f1263cbd776583e9cebab1e1f25ad8a0521a9809fc65d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "caa86249afa7a6aced9f1263cbd776583e9cebab1e1f25ad8a0521a9809fc65d", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling cty v0.2.1
[INFO] [stderr]    Compiling cty v0.1.5
[INFO] [stderr]     Checking ndless-static-vars v2.1.0
[INFO] [stderr]     Checking ndless-sys v0.2.0
[INFO] [stderr]    Compiling ndless-macros v0.4.0
[INFO] [stderr]     Checking cstr_core v0.1.2
[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/cstr_core-0.1.2/src/lib.rs:12:32
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature = "alloc", feature(alloc))]
[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 `cstr_core`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "caa86249afa7a6aced9f1263cbd776583e9cebab1e1f25ad8a0521a9809fc65d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caa86249afa7a6aced9f1263cbd776583e9cebab1e1f25ad8a0521a9809fc65d", kill_on_drop: false }`
[INFO] [stdout] caa86249afa7a6aced9f1263cbd776583e9cebab1e1f25ad8a0521a9809fc65d