[INFO] fetching crate timmy 0.3.0...
[INFO] testing timmy-0.3.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate timmy 0.3.0 into /workspace/builds/worker-60/source
[INFO] validating manifest of crates.io crate timmy 0.3.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate timmy 0.3.0
[INFO] finished tweaking crates.io crate timmy 0.3.0
[INFO] tweaked toml for crates.io crate timmy 0.3.0 written to /workspace/builds/worker-60/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ansi_term v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 04a26c5215856fc14d22d5df6d7383b971823af7dc0294487796a3fcf1f1b841
[INFO] running `Command { std: "docker" "start" "-a" "04a26c5215856fc14d22d5df6d7383b971823af7dc0294487796a3fcf1f1b841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04a26c5215856fc14d22d5df6d7383b971823af7dc0294487796a3fcf1f1b841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04a26c5215856fc14d22d5df6d7383b971823af7dc0294487796a3fcf1f1b841", kill_on_drop: false }`
[INFO] [stdout] 04a26c5215856fc14d22d5df6d7383b971823af7dc0294487796a3fcf1f1b841
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce1b2ec1a6f8bdb2c4ce209527136c9151225aff023ac546966a3287fe860de5
[INFO] running `Command { std: "docker" "start" "-a" "ce1b2ec1a6f8bdb2c4ce209527136c9151225aff023ac546966a3287fe860de5", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling linked-hash-map v0.0.9
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling ansi_term v0.8.0
[INFO] [stderr]    Compiling libsqlite3-sys v0.5.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling lru-cache v0.0.7
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling rusqlite v0.7.4
[INFO] [stderr]    Compiling timmy v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(question_mark)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `question_mark` has been stable since 1.13.0 and no longer requires an attribute to enable
[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 `timmy` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ce1b2ec1a6f8bdb2c4ce209527136c9151225aff023ac546966a3287fe860de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce1b2ec1a6f8bdb2c4ce209527136c9151225aff023ac546966a3287fe860de5", kill_on_drop: false }`
[INFO] [stdout] ce1b2ec1a6f8bdb2c4ce209527136c9151225aff023ac546966a3287fe860de5