[INFO] cloning repository https://github.com/leonbuehler/onek-btc-challenge-cpu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leonbuehler/onek-btc-challenge-cpu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleonbuehler%2Fonek-btc-challenge-cpu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleonbuehler%2Fonek-btc-challenge-cpu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a15d84b00932bdd9429965808b30879b8f9d5161
[INFO] checking leonbuehler/onek-btc-challenge-cpu against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleonbuehler%2Fonek-btc-challenge-cpu" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/leonbuehler/onek-btc-challenge-cpu
[INFO] finished tweaking git repo https://github.com/leonbuehler/onek-btc-challenge-cpu
[INFO] tweaked toml for git repo https://github.com/leonbuehler/onek-btc-challenge-cpu written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/leonbuehler/onek-btc-challenge-cpu on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/leonbuehler/onek-btc-challenge-cpu already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simple_logger v5.0.0
[INFO] [stderr]   Downloaded hex-conservative v0.3.0
[INFO] [stderr]   Downloaded bitcoin-internals v0.4.0
[INFO] [stderr]   Downloaded base58ck v0.2.0
[INFO] [stderr]   Downloaded bitcoin-io v0.2.0
[INFO] [stderr]   Downloaded bitcoin_hashes v0.16.0
[INFO] [stderr]   Downloaded cc v1.2.26
[INFO] [stderr]   Downloaded bitcoin_hashes v0.15.0
[INFO] [stderr]   Downloaded bnum v0.13.0
[INFO] [stderr]   Downloaded secp256k1 v0.31.0
[INFO] [stderr]   Downloaded secp256k1-sys v0.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8992ccec9b91680f48f708e900c2f02e6ee1106fcde09477c2bcf6f58601981b
[INFO] running `Command { std: "docker" "start" "-a" "8992ccec9b91680f48f708e900c2f02e6ee1106fcde09477c2bcf6f58601981b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8992ccec9b91680f48f708e900c2f02e6ee1106fcde09477c2bcf6f58601981b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8992ccec9b91680f48f708e900c2f02e6ee1106fcde09477c2bcf6f58601981b", kill_on_drop: false }`
[INFO] [stdout] 8992ccec9b91680f48f708e900c2f02e6ee1106fcde09477c2bcf6f58601981b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d6e8e4a4cb1557bae33828536c63dde5ea2bd86e27c8340a39f489933e70dda
[INFO] running `Command { std: "docker" "start" "-a" "9d6e8e4a4cb1557bae33828536c63dde5ea2bd86e27c8340a39f489933e70dda", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitcoin-internals v0.4.0
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling cc v1.2.26
[INFO] [stderr]     Checking hex-conservative v0.3.0
[INFO] [stderr]    Compiling time-core v0.1.4
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking num_threads v0.1.7
[INFO] [stderr]    Compiling time-macros v0.2.22
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking bitcoin_hashes v0.15.0
[INFO] [stderr]     Checking bitcoin_hashes v0.16.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking time v0.3.41
[INFO] [stderr]     Checking bnum v0.13.0
[INFO] [stderr]     Checking base58ck v0.2.0
[INFO] [stderr]    Compiling secp256k1-sys v0.11.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bnum-0.13.0/src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | /     feature(
[INFO] [stdout] 5 | |         generic_const_exprs,
[INFO] [stdout] 6 | |         const_trait_impl,
[INFO] [stdout] 7 | |         const_option,
[INFO] [stdout] 8 | |     )
[INFO] [stdout]   | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking simple_logger v5.0.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bnum` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9d6e8e4a4cb1557bae33828536c63dde5ea2bd86e27c8340a39f489933e70dda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d6e8e4a4cb1557bae33828536c63dde5ea2bd86e27c8340a39f489933e70dda", kill_on_drop: false }`
[INFO] [stdout] 9d6e8e4a4cb1557bae33828536c63dde5ea2bd86e27c8340a39f489933e70dda