[INFO] fetching crate fixity 0.0.1...
[INFO] testing fixity-0.0.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate fixity 0.0.1 into /workspace/builds/worker-48/source
[INFO] validating manifest of crates.io crate fixity 0.0.1 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] removed /workspace/builds/worker-48/source/rust-toolchain
[INFO] started tweaking crates.io crate fixity 0.0.1
[INFO] finished tweaking crates.io crate fixity 0.0.1
[INFO] tweaked toml for crates.io crate fixity 0.0.1 written to /workspace/builds/worker-48/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded borsh-derive v0.9.1
[INFO] [stderr]   Downloaded borsh-derive-internal v0.9.1
[INFO] [stderr]   Downloaded borsh v0.9.1
[INFO] [stderr]   Downloaded borsh-schema-derive-internal v0.9.1
[INFO] [stderr]   Downloaded fastcdc v1.0.5
[INFO] [stderr]   Downloaded fbuzhash v0.0.1
[INFO] [stderr]   Downloaded speedy-derive v0.7.1
[INFO] [stderr]   Downloaded speedy v0.7.1
[INFO] [stderr]   Downloaded cjson v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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] a1b011e292dc98edeb12060c68cfe912bd5f2bdb67747c501ab8960b0bae24f1
[INFO] running `Command { std: "docker" "start" "-a" "a1b011e292dc98edeb12060c68cfe912bd5f2bdb67747c501ab8960b0bae24f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1b011e292dc98edeb12060c68cfe912bd5f2bdb67747c501ab8960b0bae24f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1b011e292dc98edeb12060c68cfe912bd5f2bdb67747c501ab8960b0bae24f1", kill_on_drop: false }`
[INFO] [stdout] a1b011e292dc98edeb12060c68cfe912bd5f2bdb67747c501ab8960b0bae24f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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] 47b67b7aacc1525548710e28120ffb4deada3a8054cd499b7dbbe44d37ce4bed
[INFO] running `Command { std: "docker" "start" "-a" "47b67b7aacc1525548710e28120ffb4deada3a8054cd499b7dbbe44d37ce4bed", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling data-encoding v2.3.2
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling ahash v0.4.7
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling subtle v2.4.1
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling base-x v0.2.8
[INFO] [stderr]    Compiling dyn-clone v1.0.4
[INFO] [stderr]    Compiling fastcdc v1.0.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]    Compiling blake3 v0.3.8
[INFO] [stderr]    Compiling fbuzhash v0.0.1
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling bitvec v0.19.5
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling lru v0.6.6
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling borsh-derive-internal v0.9.1
[INFO] [stderr]    Compiling borsh-schema-derive-internal v0.9.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.10
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling speedy-derive v0.7.1
[INFO] [stderr]    Compiling async-recursion v0.3.2
[INFO] [stderr]    Compiling data-encoding-macro v0.1.12
[INFO] [stderr]    Compiling multibase v0.9.1
[INFO] [stderr]    Compiling speedy v0.7.1
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling tokio-stream v0.1.7
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling cjson v0.1.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling borsh-derive v0.9.1
[INFO] [stderr]    Compiling borsh v0.9.1
[INFO] [stderr]    Compiling fixity v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(generic_associated_types)]
[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 `fixity` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "47b67b7aacc1525548710e28120ffb4deada3a8054cd499b7dbbe44d37ce4bed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47b67b7aacc1525548710e28120ffb4deada3a8054cd499b7dbbe44d37ce4bed", kill_on_drop: false }`
[INFO] [stdout] 47b67b7aacc1525548710e28120ffb4deada3a8054cd499b7dbbe44d37ce4bed