[INFO] fetching crate piqel 0.202107.4...
[INFO] testing piqel-0.202107.4 against 1.54.0 for beta-1.55-1
[INFO] extracting crate piqel 0.202107.4 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate piqel 0.202107.4 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate piqel 0.202107.4
[INFO] finished tweaking crates.io crate piqel 0.202107.4
[INFO] tweaked toml for crates.io crate piqel 0.202107.4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate piqel 0.202107.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", 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] 6ab650c5556cec2c57a0984671c1a38ac7070e350b769a90947f2af65921b010
[INFO] running `Command { std: "docker" "start" "-a" "6ab650c5556cec2c57a0984671c1a38ac7070e350b769a90947f2af65921b010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ab650c5556cec2c57a0984671c1a38ac7070e350b769a90947f2af65921b010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ab650c5556cec2c57a0984671c1a38ac7070e350b769a90947f2af65921b010", kill_on_drop: false }`
[INFO] [stdout] 6ab650c5556cec2c57a0984671c1a38ac7070e350b769a90947f2af65921b010
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6490d42895337738ae959dea3cc518021f555ec2ef5d972f5737731ba2c313c
[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" "c6490d42895337738ae959dea3cc518021f555ec2ef5d972f5737731ba2c313c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling serde_partiql v1.1.64
[INFO] [stderr]    Compiling serde_yaml v0.8.17
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling quick-xml v0.22.0
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]    Compiling ordered-float v2.6.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling structmeta-derive v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling structmeta v0.1.3
[INFO] [stderr]    Compiling parse-display-derive v0.5.0
[INFO] [stderr]    Compiling parse-display v0.5.0
[INFO] [stderr]    Compiling piqel v0.202107.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib/mod.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Parser`
[INFO] [stdout]   --> src/lib/pqlir_parser.rs:16:14
[INFO] [stdout]    |
[INFO] [stdout] 16 |     IResult, Parser,
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]   --> src/lib/value/pql_value.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use rayon::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]  --> src/lib/value/pql_vector.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rayon::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `piqel`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "c6490d42895337738ae959dea3cc518021f555ec2ef5d972f5737731ba2c313c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6490d42895337738ae959dea3cc518021f555ec2ef5d972f5737731ba2c313c", kill_on_drop: false }`
[INFO] [stdout] c6490d42895337738ae959dea3cc518021f555ec2ef5d972f5737731ba2c313c
