[INFO] fetching crate seed_hooks 0.1.4...
[INFO] testing seed_hooks-0.1.4 against 1.60.0 for beta-1.61-1
[INFO] extracting crate seed_hooks 0.1.4 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate seed_hooks 0.1.4 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate seed_hooks 0.1.4
[INFO] finished tweaking crates.io crate seed_hooks 0.1.4
[INFO] tweaked toml for crates.io crate seed_hooks 0.1.4 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea9bed24d31df4033dd0793c24cb4b048ba050751d6604aa452423125bb13c56
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ea9bed24d31df4033dd0793c24cb4b048ba050751d6604aa452423125bb13c56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea9bed24d31df4033dd0793c24cb4b048ba050751d6604aa452423125bb13c56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea9bed24d31df4033dd0793c24cb4b048ba050751d6604aa452423125bb13c56", kill_on_drop: false }`
[INFO] [stdout] ea9bed24d31df4033dd0793c24cb4b048ba050751d6604aa452423125bb13c56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c9c5a650aca1bdc25aac881c97c4755c56de5a5f424c75f395c802b844a36af1
[INFO] running `Command { std: "docker" "start" "-a" "c9c5a650aca1bdc25aac881c97c4755c56de5a5f424c75f395c802b844a36af1", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.80
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling anymap v0.12.1
[INFO] [stderr]    Compiling enclose v1.1.8
[INFO] [stderr]    Compiling slotmap v0.4.3
[INFO] [stderr]    Compiling seed v0.7.0
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling dbg v1.0.4
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.80
[INFO] [stderr]    Compiling syn-mid v0.5.3
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling time-macros-impl v0.1.2
[INFO] [stderr]    Compiling topo-macro v0.9.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.80
[INFO] [stderr]    Compiling time-macros v0.1.1
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.80
[INFO] [stderr]    Compiling illicit-macro v0.9.0
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling cookie v0.13.3
[INFO] [stderr]    Compiling illicit v0.9.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling topo v0.9.4
[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/topo-0.9.4/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(track_caller)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `track_caller` has been stable since 1.46.0 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 `topo` 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" "c9c5a650aca1bdc25aac881c97c4755c56de5a5f424c75f395c802b844a36af1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9c5a650aca1bdc25aac881c97c4755c56de5a5f424c75f395c802b844a36af1", kill_on_drop: false }`
[INFO] [stdout] c9c5a650aca1bdc25aac881c97c4755c56de5a5f424c75f395c802b844a36af1