[INFO] fetching crate freertos-rust 0.1.2...
[INFO] testing freertos-rust-0.1.2 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate freertos-rust 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate freertos-rust 0.1.2 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 freertos-rust 0.1.2
[INFO] finished tweaking crates.io crate freertos-rust 0.1.2
[INFO] tweaked toml for crates.io crate freertos-rust 0.1.2 written to /workspace/builds/worker-1/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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] de8f1811e317dee9c5bd7cfb69dd3a85e2a658698e0fc3e910591d75a6148c94
[INFO] running `Command { std: "docker" "start" "-a" "de8f1811e317dee9c5bd7cfb69dd3a85e2a658698e0fc3e910591d75a6148c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de8f1811e317dee9c5bd7cfb69dd3a85e2a658698e0fc3e910591d75a6148c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de8f1811e317dee9c5bd7cfb69dd3a85e2a658698e0fc3e910591d75a6148c94", kill_on_drop: false }`
[INFO] [stdout] de8f1811e317dee9c5bd7cfb69dd3a85e2a658698e0fc3e910591d75a6148c94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] afcbc6cbc9b7c5cb7c04d0219db2d3c1b3d1cbe7194cc61bd0340169985fe32b
[INFO] running `Command { std: "docker" "start" "-a" "afcbc6cbc9b7c5cb7c04d0219db2d3c1b3d1cbe7194cc61bd0340169985fe32b", kill_on_drop: false }`
[INFO] [stderr]    Compiling freertos-rust v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `print_env`
[INFO] [stdout]  --> build.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn print_env() {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[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 `freertos-rust` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "afcbc6cbc9b7c5cb7c04d0219db2d3c1b3d1cbe7194cc61bd0340169985fe32b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afcbc6cbc9b7c5cb7c04d0219db2d3c1b3d1cbe7194cc61bd0340169985fe32b", kill_on_drop: false }`
[INFO] [stdout] afcbc6cbc9b7c5cb7c04d0219db2d3c1b3d1cbe7194cc61bd0340169985fe32b