[INFO] fetching crate rustboot 0.1.0...
[INFO] testing rustboot-0.1.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate rustboot 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate rustboot 0.1.0 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 crates.io crate rustboot 0.1.0
[INFO] finished tweaking crates.io crate rustboot 0.1.0
[INFO] tweaked toml for crates.io crate rustboot 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 9f242512c06d10530e1accb3a91351204c04cb189e9de083909fb80d4e2f6ee6
[INFO] running `Command { std: "docker" "start" "-a" "9f242512c06d10530e1accb3a91351204c04cb189e9de083909fb80d4e2f6ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f242512c06d10530e1accb3a91351204c04cb189e9de083909fb80d4e2f6ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f242512c06d10530e1accb3a91351204c04cb189e9de083909fb80d4e2f6ee6", kill_on_drop: false }`
[INFO] [stdout] 9f242512c06d10530e1accb3a91351204c04cb189e9de083909fb80d4e2f6ee6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 823fb0d33574ce6a7200c052bba2c309bcb30cf047969cac90ab35072af7be53
[INFO] running `Command { std: "docker" "start" "-a" "823fb0d33574ce6a7200c052bba2c309bcb30cf047969cac90ab35072af7be53", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling usize_conversions v0.2.0
[INFO] [stderr]    Compiling ux v0.1.3
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling os_bootinfo v0.2.1
[INFO] [stderr]    Compiling zero v0.1.2
[INFO] [stderr]    Compiling rlibc v1.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/usize_conversions-0.2.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(i128_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `i128_type` has been stable since 1.26.0 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 `usize_conversions` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "823fb0d33574ce6a7200c052bba2c309bcb30cf047969cac90ab35072af7be53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823fb0d33574ce6a7200c052bba2c309bcb30cf047969cac90ab35072af7be53", kill_on_drop: false }`
[INFO] [stdout] 823fb0d33574ce6a7200c052bba2c309bcb30cf047969cac90ab35072af7be53