[INFO] fetching crate ab-io-type 0.1.0...
[INFO] checking ab-io-type-0.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate ab-io-type 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate ab-io-type 0.1.0
[INFO] finished tweaking crates.io crate ab-io-type 0.1.0
[INFO] tweaked toml for crates.io crate ab-io-type 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ab-io-type 0.1.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ab-io-type 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded parity-scale-codec-derive v3.7.5
[INFO] [stderr]   Downloaded impl-trait-for-tuples v0.2.3
[INFO] [stderr]   Downloaded ab-io-type-derive v0.1.0
[INFO] [stderr]   Downloaded toml_parser v1.0.9+spec-1.1.0
[INFO] [stderr]   Downloaded parity-scale-codec v3.7.5
[INFO] [stderr]   Downloaded const_format v0.2.35
[INFO] [stderr]   Downloaded byte-slice-cast v1.2.3
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7513d7fd4786b4ddea4cc56605bec31c254a09227f3a8dc18870f22350adc2cb
[INFO] running `Command { std: "docker" "start" "-a" "7513d7fd4786b4ddea4cc56605bec31c254a09227f3a8dc18870f22350adc2cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7513d7fd4786b4ddea4cc56605bec31c254a09227f3a8dc18870f22350adc2cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7513d7fd4786b4ddea4cc56605bec31c254a09227f3a8dc18870f22350adc2cb", kill_on_drop: false }`
[INFO] [stdout] 7513d7fd4786b4ddea4cc56605bec31c254a09227f3a8dc18870f22350adc2cb
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ba4254de4daeaddc8a11c5b202fab9ec6e6c3f696e84644e69a1c9cc2190504
[INFO] running `Command { std: "docker" "start" "-a" "2ba4254de4daeaddc8a11c5b202fab9ec6e6c3f696e84644e69a1c9cc2190504", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling ab-io-type-derive v0.1.0
[INFO] [stderr]     Checking ab-io-type v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:56:1
[INFO] [stdout]    |
[INFO] [stdout] 56 | / #![feature(
[INFO] [stdout] 57 | |     cast_maybe_uninit,
[INFO] [stdout] 58 | |     const_block_items,
[INFO] [stdout] 59 | |     const_convert,
[INFO] [stdout] ...  |
[INFO] [stdout] 67 | |     ptr_as_uninit
[INFO] [stdout] 68 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:56:1
[INFO] [stdout]    |
[INFO] [stdout] 56 | / #![feature(
[INFO] [stdout] 57 | |     cast_maybe_uninit,
[INFO] [stdout] 58 | |     const_block_items,
[INFO] [stdout] 59 | |     const_convert,
[INFO] [stdout] ...  |
[INFO] [stdout] 67 | |     ptr_as_uninit
[INFO] [stdout] 68 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ab-io-type` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ab-io-type` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "2ba4254de4daeaddc8a11c5b202fab9ec6e6c3f696e84644e69a1c9cc2190504", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ba4254de4daeaddc8a11c5b202fab9ec6e6c3f696e84644e69a1c9cc2190504", kill_on_drop: false }`
[INFO] [stdout] 2ba4254de4daeaddc8a11c5b202fab9ec6e6c3f696e84644e69a1c9cc2190504
