[INFO] cloning repository https://github.com/pengowen123/blocks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pengowen123/blocks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpengowen123%2Fblocks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpengowen123%2Fblocks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66adc275ef39c2b6b6e375e9df671a4ab789f57a
[INFO] testing pengowen123/blocks against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpengowen123%2Fblocks" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pengowen123/blocks on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pengowen123/blocks
[INFO] finished tweaking git repo https://github.com/pengowen123/blocks
[INFO] tweaked toml for git repo https://github.com/pengowen123/blocks written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/pengowen123/blocks already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25f4601da3d94858fea381dd6d5b0c024c9e6d0e8f58ced983e6ec1e3d24ee22
[INFO] running `Command { std: "docker" "start" "-a" "25f4601da3d94858fea381dd6d5b0c024c9e6d0e8f58ced983e6ec1e3d24ee22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25f4601da3d94858fea381dd6d5b0c024c9e6d0e8f58ced983e6ec1e3d24ee22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25f4601da3d94858fea381dd6d5b0c024c9e6d0e8f58ced983e6ec1e3d24ee22", kill_on_drop: false }`
[INFO] [stdout] 25f4601da3d94858fea381dd6d5b0c024c9e6d0e8f58ced983e6ec1e3d24ee22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7eb5d1253c8124efa3494034bd0947ebd5cb94a8cbcea8d8e95445617555af9d
[INFO] running `Command { std: "docker" "start" "-a" "7eb5d1253c8124efa3494034bd0947ebd5cb94a8cbcea8d8e95445617555af9d", kill_on_drop: false }`
[INFO] [stderr]    Compiling blocks 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(core_intrinsics)]
[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(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 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 `blocks` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "7eb5d1253c8124efa3494034bd0947ebd5cb94a8cbcea8d8e95445617555af9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7eb5d1253c8124efa3494034bd0947ebd5cb94a8cbcea8d8e95445617555af9d", kill_on_drop: false }`
[INFO] [stdout] 7eb5d1253c8124efa3494034bd0947ebd5cb94a8cbcea8d8e95445617555af9d