[INFO] fetching crate tallystick 0.4.3...
[INFO] testing tallystick-0.4.3 against 1.59.0 for beta-1.60-1
[INFO] extracting crate tallystick 0.4.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate tallystick 0.4.3 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 tallystick 0.4.3
[INFO] finished tweaking crates.io crate tallystick 0.4.3
[INFO] tweaked toml for crates.io crate tallystick 0.4.3 written to /workspace/builds/worker-2/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] 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] c6d788f638ba0712b06d5558afbec2d628d9212853330ca2960818881d86ffb6
[INFO] running `Command { std: "docker" "start" "-a" "c6d788f638ba0712b06d5558afbec2d628d9212853330ca2960818881d86ffb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6d788f638ba0712b06d5558afbec2d628d9212853330ca2960818881d86ffb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6d788f638ba0712b06d5558afbec2d628d9212853330ca2960818881d86ffb6", kill_on_drop: false }`
[INFO] [stdout] c6d788f638ba0712b06d5558afbec2d628d9212853330ca2960818881d86ffb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] f66edab29dd7f66a9ff920b5f8d540c7eecffe73d592234dea5b4733f87eff89
[INFO] running `Command { std: "docker" "start" "-a" "f66edab29dd7f66a9ff920b5f8d540c7eecffe73d592234dea5b4733f87eff89", 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] [stderr]    Compiling once_cell v1.9.0
[INFO] [stderr]    Compiling fixedbitset v0.4.1
[INFO] [stderr]    Compiling partial-min-max v0.4.0
[INFO] [stderr]    Compiling getrandom v0.2.5
[INFO] [stderr]    Compiling object v0.27.1
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling petgraph v0.6.0
[INFO] [stderr]    Compiling backtrace v0.3.64
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling tallystick v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:34
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![cfg_attr(feature = "nightly", feature(specialization))]
[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 `tallystick` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f66edab29dd7f66a9ff920b5f8d540c7eecffe73d592234dea5b4733f87eff89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f66edab29dd7f66a9ff920b5f8d540c7eecffe73d592234dea5b4733f87eff89", kill_on_drop: false }`
[INFO] [stdout] f66edab29dd7f66a9ff920b5f8d540c7eecffe73d592234dea5b4733f87eff89