[INFO] fetching crate matrix-rs 1.0.1...
[INFO] testing matrix-rs-1.0.1 against 1.69.0 for beta-1.70-1
[INFO] extracting crate matrix-rs 1.0.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate matrix-rs 1.0.1 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate matrix-rs 1.0.1
[INFO] finished tweaking crates.io crate matrix-rs 1.0.1
[INFO] tweaked toml for crates.io crate matrix-rs 1.0.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded checks v1.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 69fa98a98ab8736d70b2042ec1d23cd59be24f8991078f205a93fc46b59f9edf
[INFO] running `Command { std: "docker" "start" "-a" "69fa98a98ab8736d70b2042ec1d23cd59be24f8991078f205a93fc46b59f9edf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69fa98a98ab8736d70b2042ec1d23cd59be24f8991078f205a93fc46b59f9edf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69fa98a98ab8736d70b2042ec1d23cd59be24f8991078f205a93fc46b59f9edf", kill_on_drop: false }`
[INFO] [stdout] 69fa98a98ab8736d70b2042ec1d23cd59be24f8991078f205a93fc46b59f9edf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca2cb518cc9a17fe6205d83d4fef5ade56a7eb041b7ec7b4fc08c3cdf9ab4ea8
[INFO] running `Command { std: "docker" "start" "-a" "ca2cb518cc9a17fe6205d83d4fef5ade56a7eb041b7ec7b4fc08c3cdf9ab4ea8", kill_on_drop: false }`
[INFO] [stderr]    Compiling checks v1.0.5
[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/checks-1.0.5/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs)]
[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 `checks` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ca2cb518cc9a17fe6205d83d4fef5ade56a7eb041b7ec7b4fc08c3cdf9ab4ea8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca2cb518cc9a17fe6205d83d4fef5ade56a7eb041b7ec7b4fc08c3cdf9ab4ea8", kill_on_drop: false }`
[INFO] [stdout] ca2cb518cc9a17fe6205d83d4fef5ade56a7eb041b7ec7b4fc08c3cdf9ab4ea8
