[INFO] fetching crate compact-option 0.1.0...
[INFO] checking compact-option-0.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate compact-option 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate compact-option 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate compact-option 0.1.0
[INFO] tweaked toml for crates.io crate compact-option 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate compact-option 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 compact-option 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 compact-option-proc-macro v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 6f8dbd3fe1795ee5fd0a4ce45329721c4a0f61a10a9835c30c0bd4a33174b094
[INFO] running `Command { std: "docker" "start" "-a" "6f8dbd3fe1795ee5fd0a4ce45329721c4a0f61a10a9835c30c0bd4a33174b094", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f8dbd3fe1795ee5fd0a4ce45329721c4a0f61a10a9835c30c0bd4a33174b094", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f8dbd3fe1795ee5fd0a4ce45329721c4a0f61a10a9835c30c0bd4a33174b094", kill_on_drop: false }`
[INFO] [stdout] 6f8dbd3fe1795ee5fd0a4ce45329721c4a0f61a10a9835c30c0bd4a33174b094
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 0958822fe14ac7ea91493d1c02a632afd72f07890decbf661033e805ac724779
[INFO] running `Command { std: "docker" "start" "-a" "0958822fe14ac7ea91493d1c02a632afd72f07890decbf661033e805ac724779", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-triple v1.0.0
[INFO] [stderr]     Checking wait-timeout v0.2.1
[INFO] [stderr]     Checking tempfile v3.27.0
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking rand v0.9.4
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand_xorshift v0.4.0
[INFO] [stderr]     Checking compact-option v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling compact-option-proc-macro v0.1.0
[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(const_trait_impl)]
[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 `compact-option` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0958822fe14ac7ea91493d1c02a632afd72f07890decbf661033e805ac724779", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0958822fe14ac7ea91493d1c02a632afd72f07890decbf661033e805ac724779", kill_on_drop: false }`
[INFO] [stdout] 0958822fe14ac7ea91493d1c02a632afd72f07890decbf661033e805ac724779
