[INFO] fetching crate pdotc 0.2.7...
[INFO] testing pdotc-0.2.7 against 1.60.0 for beta-1.61-1
[INFO] extracting crate pdotc 0.2.7 into /workspace/builds/worker-16/source
[INFO] validating manifest of crates.io crate pdotc 0.2.7 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 pdotc 0.2.7
[INFO] finished tweaking crates.io crate pdotc 0.2.7
[INFO] tweaked toml for crates.io crate pdotc 0.2.7 written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] crate crates.io crate pdotc 0.2.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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] [stderr]  Downloading crates ...
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[INFO] [stderr]   Downloaded webpki-roots v0.22.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3965f427d311a556fd18733aa1b92e5448f6132a035d3bbecf96e0cf6afae71e
[INFO] running `Command { std: "docker" "start" "-a" "3965f427d311a556fd18733aa1b92e5448f6132a035d3bbecf96e0cf6afae71e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3965f427d311a556fd18733aa1b92e5448f6132a035d3bbecf96e0cf6afae71e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3965f427d311a556fd18733aa1b92e5448f6132a035d3bbecf96e0cf6afae71e", kill_on_drop: false }`
[INFO] [stdout] 3965f427d311a556fd18733aa1b92e5448f6132a035d3bbecf96e0cf6afae71e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ef2ceab78725046d9ff76dd6303f048c4fb6956b5b944c3e6b863c528d90eb9
[INFO] running `Command { std: "docker" "start" "-a" "7ef2ceab78725046d9ff76dd6303f048c4fb6956b5b944c3e6b863c528d90eb9", 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 proc-macro2 v1.0.33
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[INFO] [stderr]    Compiling dyn-clonable-impl v0.9.0
[INFO] [stderr]    Compiling dyn-clonable v0.9.0
[INFO] [stderr]    Compiling zeroize v1.4.3
[INFO] [stderr]    Compiling merlin v2.0.1
[INFO] [stderr]    Compiling curve25519-dalek v2.1.3
[INFO] [stderr]    Compiling curve25519-dalek v3.2.0
[INFO] [stderr]    Compiling secrecy v0.8.0
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[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling tiny-bip39 v0.8.2
[INFO] [stderr]    Compiling substrate-bip39 v0.4.4
[INFO] [stderr]    Compiling futures-executor v0.3.18
[INFO] [stderr]    Compiling futures v0.3.18
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling impl-serde v0.3.2
[INFO] [stderr]    Compiling tracing-serde v0.1.2
[INFO] [stderr]    Compiling ed25519-dalek v1.0.1
[INFO] [stderr]    Compiling tracing-subscriber v0.2.25
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling ss58-registry v1.9.0
[INFO] [stderr]    Compiling parity-scale-codec-derive v2.3.1
[INFO] [stderr]    Compiling scale-info-derive v1.0.0
[INFO] [stderr]    Compiling sp-runtime-interface-proc-macro v4.0.0
[INFO] [stderr]    Compiling parity-scale-codec v2.3.1
[INFO] [stderr]    Compiling scale-info v1.0.0
[INFO] [stderr]    Compiling impl-codec v0.5.1
[INFO] [stderr]    Compiling sp-storage v4.0.0
[INFO] [stderr]    Compiling sp-wasm-interface v4.0.0
[INFO] [stderr]    Compiling sp-tracing v4.0.0
[INFO] [stderr]    Compiling sp-externalities v0.10.0
[INFO] [stderr]    Compiling primitive-types v0.10.1
[INFO] [stderr]    Compiling sp-runtime-interface v4.0.0
[INFO] [stderr]    Compiling sp-core v4.0.0
[INFO] [stderr]    Compiling pdotc v0.2.7 (/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(const_fn_trait_bound)]
[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 `pdotc` 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" "7ef2ceab78725046d9ff76dd6303f048c4fb6956b5b944c3e6b863c528d90eb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ef2ceab78725046d9ff76dd6303f048c4fb6956b5b944c3e6b863c528d90eb9", kill_on_drop: false }`
[INFO] [stdout] 7ef2ceab78725046d9ff76dd6303f048c4fb6956b5b944c3e6b863c528d90eb9