[INFO] fetching crate libbitcoin 0.1.0...
[INFO] testing libbitcoin-0.1.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate libbitcoin 0.1.0 into /workspace/builds/worker-30/source
[INFO] validating manifest of crates.io crate libbitcoin 0.1.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libbitcoin 0.1.0
[INFO] finished tweaking crates.io crate libbitcoin 0.1.0
[INFO] tweaked toml for crates.io crate libbitcoin 0.1.0 written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded amplify_derive v2.11.2
[INFO] [stderr]   Downloaded amplify_syn v1.1.6
[INFO] [stderr]   Downloaded amplify v3.12.0
[INFO] [stderr]   Downloaded amplify_num v0.4.0
[INFO] [stderr]   Downloaded bitcoin_hashes v0.10.0
[INFO] [stderr]   Downloaded bech32 v0.8.1
[INFO] [stderr]   Downloaded bitcoin v0.27.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58e0fc20a84784ff4d538bb2537397ec28aeb57909aaf278718ecbd03b7c753c
[INFO] running `Command { std: "docker" "start" "-a" "58e0fc20a84784ff4d538bb2537397ec28aeb57909aaf278718ecbd03b7c753c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58e0fc20a84784ff4d538bb2537397ec28aeb57909aaf278718ecbd03b7c753c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58e0fc20a84784ff4d538bb2537397ec28aeb57909aaf278718ecbd03b7c753c", kill_on_drop: false }`
[INFO] [stdout] 58e0fc20a84784ff4d538bb2537397ec28aeb57909aaf278718ecbd03b7c753c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c7a4707e6573e5e7f04ce6863ca790b3cd311a6cbba4c528c08747cd1d34e56
[INFO] running `Command { std: "docker" "start" "-a" "7c7a4707e6573e5e7f04ce6863ca790b3cd311a6cbba4c528c08747cd1d34e56", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling bitcoin_hashes v0.9.7
[INFO] [stderr]    Compiling bitcoin_hashes v0.10.0
[INFO] [stderr]    Compiling bech32 v0.8.1
[INFO] [stderr]    Compiling amplify_num v0.4.0
[INFO] [stderr]    Compiling secp256k1-sys v0.4.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.9
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling secp256k1 v0.20.3
[INFO] [stderr]    Compiling bitcoin v0.27.1
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling amplify_syn v1.1.6
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling amplify_derive v2.11.2
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]    Compiling darling v0.13.4
[INFO] [stderr]    Compiling serde_with_macros v1.5.2
[INFO] [stderr]    Compiling amplify v3.12.0
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling bip39 v1.0.1
[INFO] [stderr]    Compiling serde_with v1.12.1
[INFO] [stderr]    Compiling libbitcoin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(try_trait_v2)]
[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 `libbitcoin` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "7c7a4707e6573e5e7f04ce6863ca790b3cd311a6cbba4c528c08747cd1d34e56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c7a4707e6573e5e7f04ce6863ca790b3cd311a6cbba4c528c08747cd1d34e56", kill_on_drop: false }`
[INFO] [stdout] 7c7a4707e6573e5e7f04ce6863ca790b3cd311a6cbba4c528c08747cd1d34e56