[INFO] fetching crate holodeque 0.2.0...
[INFO] testing holodeque-0.2.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate holodeque 0.2.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate holodeque 0.2.0
[INFO] finished tweaking crates.io crate holodeque 0.2.0
[INFO] tweaked toml for crates.io crate holodeque 0.2.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate holodeque 0.2.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 63 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_spanned v0.6.9
[INFO] [stderr]   Downloaded toml_datetime v0.6.11
[INFO] [stderr]   Downloaded version-sync v0.9.5
[INFO] [stderr]   Downloaded unicase v2.8.1
[INFO] [stderr]   Downloaded serde_test v1.0.177
[INFO] [stderr]   Downloaded env_logger v0.8.4
[INFO] [stderr]   Downloaded quickcheck v1.0.3
[INFO] [stderr]   Downloaded pulldown-cmark v0.9.6
[INFO] [stderr]   Downloaded toml v0.7.8
[INFO] [stderr]   Downloaded toml_edit v0.19.15
[INFO] [stderr]   Downloaded winnow v0.5.40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 86af7dfe05aedfa641eef00fa40ab1fc82cf21ca7bf5e5f29e2025d9f31fcb9b
[INFO] running `Command { std: "docker" "start" "-a" "86af7dfe05aedfa641eef00fa40ab1fc82cf21ca7bf5e5f29e2025d9f31fcb9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86af7dfe05aedfa641eef00fa40ab1fc82cf21ca7bf5e5f29e2025d9f31fcb9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86af7dfe05aedfa641eef00fa40ab1fc82cf21ca7bf5e5f29e2025d9f31fcb9b", kill_on_drop: false }`
[INFO] [stdout] 86af7dfe05aedfa641eef00fa40ab1fc82cf21ca7bf5e5f29e2025d9f31fcb9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 534439173da8faba519961130efc670b0c89af4a1934e1d1ee82ea1e3edd567e
[INFO] running `Command { std: "docker" "start" "-a" "534439173da8faba519961130efc670b0c89af4a1934e1d1ee82ea1e3edd567e", kill_on_drop: false }`
[INFO] [stderr]    Compiling holodeque v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:87:1
[INFO] [stdout]    |
[INFO] [stdout] 87 | #![feature(array_map)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `array_map` has been stable since 1.55.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 | #![feature(array_map)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `holodeque` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "534439173da8faba519961130efc670b0c89af4a1934e1d1ee82ea1e3edd567e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "534439173da8faba519961130efc670b0c89af4a1934e1d1ee82ea1e3edd567e", kill_on_drop: false }`
[INFO] [stdout] 534439173da8faba519961130efc670b0c89af4a1934e1d1ee82ea1e3edd567e
