[INFO] fetching crate secp256kfun 0.6.1...
[INFO] testing secp256kfun-0.6.1 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate secp256kfun 0.6.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate secp256kfun 0.6.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate secp256kfun 0.6.1
[INFO] finished tweaking crates.io crate secp256kfun 0.6.1
[INFO] tweaked toml for crates.io crate secp256kfun 0.6.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate secp256kfun 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded secp256k1 v0.20.1
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.23
[INFO] [stderr]   Downloaded secp256k1-sys v0.4.0
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.23
[INFO] [stderr]   Downloaded secp256kfun_parity_backend v0.1.5
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8376fab41810e03aedb03f7c7ef76d8c11a3a80081947249f13f69ba936115f9
[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" "8376fab41810e03aedb03f7c7ef76d8c11a3a80081947249f13f69ba936115f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8376fab41810e03aedb03f7c7ef76d8c11a3a80081947249f13f69ba936115f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8376fab41810e03aedb03f7c7ef76d8c11a3a80081947249f13f69ba936115f9", kill_on_drop: false }`
[INFO] [stdout] 8376fab41810e03aedb03f7c7ef76d8c11a3a80081947249f13f69ba936115f9
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7779d739511ff4de1fbb7ceef3d94e278f1233d3eb0461c6cac34a5f4425665
[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" "c7779d739511ff4de1fbb7ceef3d94e278f1233d3eb0461c6cac34a5f4425665", kill_on_drop: false }`
[INFO] [stderr]    Compiling subtle-ng v2.4.1
[INFO] [stderr]    Compiling secp256kfun_parity_backend v0.1.5
[INFO] [stderr]    Compiling secp256kfun v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(rustc_attrs, min_specialization, extended_key_value_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `extended_key_value_attributes` has been stable since 1.54.0 and no longer requires an attribute to enable
[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 `secp256kfun` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c7779d739511ff4de1fbb7ceef3d94e278f1233d3eb0461c6cac34a5f4425665", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7779d739511ff4de1fbb7ceef3d94e278f1233d3eb0461c6cac34a5f4425665", kill_on_drop: false }`
[INFO] [stdout] c7779d739511ff4de1fbb7ceef3d94e278f1233d3eb0461c6cac34a5f4425665
