[INFO] fetching crate datafu 0.0.7...
[INFO] testing datafu-0.0.7 against 1.59.0 for beta-1.60-1
[INFO] extracting crate datafu 0.0.7 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate datafu 0.0.7 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 datafu 0.0.7
[INFO] finished tweaking crates.io crate datafu 0.0.7
[INFO] tweaked toml for crates.io crate datafu 0.0.7 written to /workspace/builds/worker-26/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] [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-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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] cbc3cda2bb3b74330153f0b07db74b48a54fc688fb289996b090bc732e38345d
[INFO] running `Command { std: "docker" "start" "-a" "cbc3cda2bb3b74330153f0b07db74b48a54fc688fb289996b090bc732e38345d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cbc3cda2bb3b74330153f0b07db74b48a54fc688fb289996b090bc732e38345d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbc3cda2bb3b74330153f0b07db74b48a54fc688fb289996b090bc732e38345d", kill_on_drop: false }`
[INFO] [stdout] cbc3cda2bb3b74330153f0b07db74b48a54fc688fb289996b090bc732e38345d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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] 44969bc83ce6240fcc1af9d151def36186a8b293e9224937f087966b928c600c
[INFO] running `Command { std: "docker" "start" "-a" "44969bc83ce6240fcc1af9d151def36186a8b293e9224937f087966b928c600c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling totally-safe-transmute v0.0.3
[INFO] [stderr]    Compiling datafu v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:19:38
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(not(feature = "stable"), feature(label_break_value))]
[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 `datafu` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "44969bc83ce6240fcc1af9d151def36186a8b293e9224937f087966b928c600c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44969bc83ce6240fcc1af9d151def36186a8b293e9224937f087966b928c600c", kill_on_drop: false }`
[INFO] [stdout] 44969bc83ce6240fcc1af9d151def36186a8b293e9224937f087966b928c600c