[INFO] cloning repository https://github.com/tracer-protocol/tracer-ome
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tracer-protocol/tracer-ome" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftracer-protocol%2Ftracer-ome", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftracer-protocol%2Ftracer-ome'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2400e042205678a8b6932389c8c90b53598d1cf8
[INFO] testing tracer-protocol/tracer-ome against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftracer-protocol%2Ftracer-ome" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tracer-protocol/tracer-ome 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 git repo https://github.com/tracer-protocol/tracer-ome
[INFO] finished tweaking git repo https://github.com/tracer-protocol/tracer-ome
[INFO] tweaked toml for git repo https://github.com/tracer-protocol/tracer-ome written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/tracer-protocol/tracer-ome already has a lockfile, it will not be regenerated
[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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 1fd1af5cf69669d45e63327fedc66fd81c375a169b11f6adb790381c90bf5425
[INFO] running `Command { std: "docker" "start" "-a" "1fd1af5cf69669d45e63327fedc66fd81c375a169b11f6adb790381c90bf5425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fd1af5cf69669d45e63327fedc66fd81c375a169b11f6adb790381c90bf5425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fd1af5cf69669d45e63327fedc66fd81c375a169b11f6adb790381c90bf5425", kill_on_drop: false }`
[INFO] [stdout] 1fd1af5cf69669d45e63327fedc66fd81c375a169b11f6adb790381c90bf5425
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 3416db261532b8e49e48d7be4bdea4fdcacb97e6cffa947286cb4b2c32fb7da6
[INFO] running `Command { std: "docker" "start" "-a" "3416db261532b8e49e48d7be4bdea4fdcacb97e6cffa947286cb4b2c32fb7da6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling futures-core v0.3.14
[INFO] [stderr]    Compiling cc v1.0.41
[INFO] [stderr]    Compiling futures-io v0.3.14
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling futures-sink v0.3.14
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling futures-task v0.3.14
[INFO] [stderr]    Compiling httparse v1.4.0
[INFO] [stderr]    Compiling openssl v0.10.33
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling byte-slice-cast v0.3.5
[INFO] [stderr]    Compiling vec-arena v1.1.0
[INFO] [stderr]    Compiling httpdate v1.0.0
[INFO] [stderr]    Compiling utf-8 v0.7.6
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling futures-timer v3.0.2
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling input_buffer v0.4.0
[INFO] [stderr]    Compiling rlp v0.4.6
[INFO] [stderr]    Compiling async-lock v2.4.0
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling lock_api v0.4.3
[INFO] [stderr]    Compiling http-body v0.4.1
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling headers-core v0.2.0
[INFO] [stderr]    Compiling block-buffer v0.9.0
[INFO] [stderr]    Compiling url v2.2.1
[INFO] [stderr]    Compiling futures-channel v0.3.14
[INFO] [stderr]    Compiling async-channel v1.6.1
[INFO] [stderr]    Compiling futures-lite v1.11.3
[INFO] [stderr]    Compiling sha-1 v0.9.4
[INFO] [stderr]    Compiling impl-rlp v0.2.1
[INFO] [stderr]    Compiling uint v0.8.5
[INFO] [stderr]    Compiling openssl-sys v0.9.61
[INFO] [stderr]    Compiling ring v0.16.12
[INFO] [stderr]    Compiling secp256k1-sys v0.1.2
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling socket2 v0.4.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling async-executor v1.4.0
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling secp256k1 v0.17.2
[INFO] [stderr]    Compiling headers v0.3.4
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling fixed-hash v0.6.1
[INFO] [stderr]    Compiling sct v0.6.0
[INFO] [stderr]    Compiling webpki v0.21.2
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling derive_more v0.99.13
[INFO] [stderr]    Compiling enum-display-derive v0.1.1
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]    Compiling futures-util v0.3.14
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling tracing v0.1.25
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling polling v2.0.3
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling tungstenite v0.12.0
[INFO] [stderr]    Compiling rustls v0.19.1
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling multipart v0.17.1
[INFO] [stderr]    Compiling pin-project v1.0.7
[INFO] [stderr]    Compiling async-io v1.4.0
[INFO] [stderr]    Compiling pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling tokio v0.2.25
[INFO] [stderr]    Compiling async-global-executor v2.0.2
[INFO] [stderr]    Compiling async-std v1.9.0
[INFO] [stderr]    Compiling futures-executor v0.3.14
[INFO] [stderr]    Compiling futures v0.3.14
[INFO] [stderr]    Compiling soketto v0.4.2
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-tls v0.3.1
[INFO] [stderr]    Compiling h2 v0.2.7
[INFO] [stderr]    Compiling tokio-util v0.6.6
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling tokio-rustls v0.22.0
[INFO] [stderr]    Compiling tokio-tungstenite v0.13.0
[INFO] [stderr]    Compiling tokio-stream v0.1.5
[INFO] [stderr]    Compiling h2 v0.3.2
[INFO] [stderr]    Compiling parity-scale-codec v1.3.7
[INFO] [stderr]    Compiling impl-serde v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling ethbloom v0.9.2
[INFO] [stderr]    Compiling jsonrpc-core v14.2.0
[INFO] [stderr]    Compiling async-native-tls v0.3.3
[INFO] [stderr]    Compiling hyper v0.13.10
[INFO] [stderr]    Compiling hyper-tls v0.4.3
[INFO] [stderr]    Compiling hyper v0.14.6
[INFO] [stderr]    Compiling impl-codec v0.4.2
[INFO] [stderr]    Compiling primitive-types v0.7.3
[INFO] [stderr]    Compiling ethereum-types v0.9.2
[INFO] [stderr]    Compiling ethabi v12.0.0
[INFO] [stderr]    Compiling web3 v0.13.0
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling warp v0.3.1
[INFO] [stderr]    Compiling reqwest v0.11.3
[INFO] [stderr]    Compiling tracer-ome 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(result_contains_err)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(destructuring_assignment)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `tracer-ome` due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3416db261532b8e49e48d7be4bdea4fdcacb97e6cffa947286cb4b2c32fb7da6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3416db261532b8e49e48d7be4bdea4fdcacb97e6cffa947286cb4b2c32fb7da6", kill_on_drop: false }`
[INFO] [stdout] 3416db261532b8e49e48d7be4bdea4fdcacb97e6cffa947286cb4b2c32fb7da6