[INFO] fetching crate data_models 0.2.0...
[INFO] testing data_models-0.2.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate data_models 0.2.0 into /workspace/builds/worker-23/source
[INFO] validating manifest of crates.io crate data_models 0.2.0 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 data_models 0.2.0
[INFO] finished tweaking crates.io crate data_models 0.2.0
[INFO] tweaked toml for crates.io crate data_models 0.2.0 written to /workspace/builds/worker-23/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-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] 10388cf29d9fcd557a8ca678e35d3e7d13d566d5ffdc95effed2de49c216f643
[INFO] running `Command { std: "docker" "start" "-a" "10388cf29d9fcd557a8ca678e35d3e7d13d566d5ffdc95effed2de49c216f643", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10388cf29d9fcd557a8ca678e35d3e7d13d566d5ffdc95effed2de49c216f643", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10388cf29d9fcd557a8ca678e35d3e7d13d566d5ffdc95effed2de49c216f643", kill_on_drop: false }`
[INFO] [stdout] 10388cf29d9fcd557a8ca678e35d3e7d13d566d5ffdc95effed2de49c216f643
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] e458ca2c5be7cf0d784f6a4fa6aa7978315db84154a58566d8ed7a3574d8e06c
[INFO] running `Command { std: "docker" "start" "-a" "e458ca2c5be7cf0d784f6a4fa6aa7978315db84154a58566d8ed7a3574d8e06c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling data_models 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(min_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 `data_models` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e458ca2c5be7cf0d784f6a4fa6aa7978315db84154a58566d8ed7a3574d8e06c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e458ca2c5be7cf0d784f6a4fa6aa7978315db84154a58566d8ed7a3574d8e06c", kill_on_drop: false }`
[INFO] [stdout] e458ca2c5be7cf0d784f6a4fa6aa7978315db84154a58566d8ed7a3574d8e06c