[INFO] fetching crate emitter 0.0.1...
[INFO] testing emitter-0.0.1 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate emitter 0.0.1 into /workspace/builds/worker-96/source
[INFO] validating manifest of crates.io crate emitter 0.0.1 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 emitter 0.0.1
[INFO] finished tweaking crates.io crate emitter 0.0.1
[INFO] tweaked toml for crates.io crate emitter 0.0.1 written to /workspace/builds/worker-96/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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] 4dfd70c6af32cd76d7a942da7ae3ec8e838f057f65804f197fc833647ed6376e
[INFO] running `Command { std: "docker" "start" "-a" "4dfd70c6af32cd76d7a942da7ae3ec8e838f057f65804f197fc833647ed6376e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dfd70c6af32cd76d7a942da7ae3ec8e838f057f65804f197fc833647ed6376e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dfd70c6af32cd76d7a942da7ae3ec8e838f057f65804f197fc833647ed6376e", kill_on_drop: false }`
[INFO] [stdout] 4dfd70c6af32cd76d7a942da7ae3ec8e838f057f65804f197fc833647ed6376e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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] a23270dd506e8e4bfed1b53de410fc75bdbce79b012b51e944066a5702fce764
[INFO] running `Command { std: "docker" "start" "-a" "a23270dd506e8e4bfed1b53de410fc75bdbce79b012b51e944066a5702fce764", kill_on_drop: false }`
[INFO] [stderr]    Compiling emitter v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `,`, `:`, `=`, or `>`, found `?`
[INFO] [stdout]   --> src/lib.rs:13:22
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Event<Sized? X>: 'static {}
[INFO] [stdout]    |                      ^ expected one of `,`, `:`, `=`, or `>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `emitter` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a23270dd506e8e4bfed1b53de410fc75bdbce79b012b51e944066a5702fce764", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a23270dd506e8e4bfed1b53de410fc75bdbce79b012b51e944066a5702fce764", kill_on_drop: false }`
[INFO] [stdout] a23270dd506e8e4bfed1b53de410fc75bdbce79b012b51e944066a5702fce764