[INFO] fetching crate nomos 0.1.0...
[INFO] testing nomos-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate nomos 0.1.0 into /workspace/builds/worker-38/source
[INFO] validating manifest of crates.io crate nomos 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nomos 0.1.0
[INFO] finished tweaking crates.io crate nomos 0.1.0
[INFO] tweaked toml for crates.io crate nomos 0.1.0 written to /workspace/builds/worker-38/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fced6a93915c83663220f87ae62769781e83df9c38c0ce33af33fb2752d745ab
[INFO] running `Command { std: "docker" "start" "-a" "fced6a93915c83663220f87ae62769781e83df9c38c0ce33af33fb2752d745ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fced6a93915c83663220f87ae62769781e83df9c38c0ce33af33fb2752d745ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fced6a93915c83663220f87ae62769781e83df9c38c0ce33af33fb2752d745ab", kill_on_drop: false }`
[INFO] [stdout] fced6a93915c83663220f87ae62769781e83df9c38c0ce33af33fb2752d745ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c88dd44511f44a8f3250bbb0b635ce2e4ba1c8f9fe8d483cbf23ac11e18b560
[INFO] running `Command { std: "docker" "start" "-a" "8c88dd44511f44a8f3250bbb0b635ce2e4ba1c8f9fe8d483cbf23ac11e18b560", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling cranelift-entity v0.31.0
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling wasmparser v0.32.1
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.31.0
[INFO] [stderr]    Compiling cranelift-bforest v0.31.0
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling blake2b_simd v0.4.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling object v0.26.2
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling raw-cpuid v6.1.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling errno v0.2.7
[INFO] [stderr]    Compiling page_size v0.4.2
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling dynasmrt v0.3.1
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling wasmer-runtime-core v0.5.7
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling addr2line v0.16.0
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling cranelift-codegen v0.31.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling dynasm v0.3.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/dynasm-0.3.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/dynasm-0.3.2/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dynasm` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8c88dd44511f44a8f3250bbb0b635ce2e4ba1c8f9fe8d483cbf23ac11e18b560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c88dd44511f44a8f3250bbb0b635ce2e4ba1c8f9fe8d483cbf23ac11e18b560", kill_on_drop: false }`
[INFO] [stdout] 8c88dd44511f44a8f3250bbb0b635ce2e4ba1c8f9fe8d483cbf23ac11e18b560