[INFO] fetching crate ra2m_sim 0.1.0...
[INFO] checking ra2m_sim-0.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate ra2m_sim 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate ra2m_sim 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate ra2m_sim 0.1.0
[INFO] tweaked toml for crates.io crate ra2m_sim 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ra2m_sim 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 ra2m_sim 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 ctrlc v3.5.1
[INFO] [stderr]   Downloaded zmij v1.0.13
[INFO] [stderr]   Downloaded ra2m_sim_macros v0.1.0
[INFO] [stderr]   Downloaded serial_test_derive v0.8.0
[INFO] [stderr]   Downloaded serial_test v0.8.0
[INFO] [stderr]   Downloaded ra2m_sim_output v0.1.0
[INFO] [stderr]   Downloaded ra2m_sim_kernel v0.1.0
[INFO] [stderr]   Downloaded ra2m_sim_containers v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 81af1891bf73ec1b56c1354acd23b0aa082abb35f4fdccfb33fc7f4759ceb28d
[INFO] running `Command { std: "docker" "start" "-a" "81af1891bf73ec1b56c1354acd23b0aa082abb35f4fdccfb33fc7f4759ceb28d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81af1891bf73ec1b56c1354acd23b0aa082abb35f4fdccfb33fc7f4759ceb28d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81af1891bf73ec1b56c1354acd23b0aa082abb35f4fdccfb33fc7f4759ceb28d", kill_on_drop: false }`
[INFO] [stdout] 81af1891bf73ec1b56c1354acd23b0aa082abb35f4fdccfb33fc7f4759ceb28d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] cadf561ff3b3a3ca42c3b8c9459113ae03061423b0c662cb1a44ad36724df0c9
[INFO] running `Command { std: "docker" "start" "-a" "cadf561ff3b3a3ca42c3b8c9459113ae03061423b0c662cb1a44ad36724df0c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.105
[INFO] [stderr]    Compiling quote v1.0.43
[INFO] [stderr]    Compiling libc v0.2.180
[INFO] [stderr]    Compiling zerocopy v0.8.33
[INFO] [stderr]    Compiling zmij v1.0.13
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]     Checking regex-syntax v0.8.8
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking chrono v0.4.42
[INFO] [stderr]     Checking crossbeam-deque v0.8.6
[INFO] [stderr]     Checking serde_json v1.0.149
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking crossbeam-queue v0.3.12
[INFO] [stderr]     Checking crossbeam-channel v0.5.15
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]     Checking bytemuck v1.24.0
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]    Compiling syn v2.0.114
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error-attr2 v2.0.0
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking regex-automata v0.4.13
[INFO] [stderr]     Checking getrandom v0.2.17
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking errno v0.3.14
[INFO] [stderr]     Checking signal-hook-registry v1.4.8
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking socket2 v0.6.1
[INFO] [stderr]     Checking mio v1.1.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking ctrlc v3.5.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking regex v1.12.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/regex-1.12.2/src/lib.rs:1321:34
[INFO] [stdout]      |
[INFO] [stdout] 1321 | #![cfg_attr(feature = "pattern", feature(pattern))]
[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 `regex` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "cadf561ff3b3a3ca42c3b8c9459113ae03061423b0c662cb1a44ad36724df0c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cadf561ff3b3a3ca42c3b8c9459113ae03061423b0c662cb1a44ad36724df0c9", kill_on_drop: false }`
[INFO] [stdout] cadf561ff3b3a3ca42c3b8c9459113ae03061423b0c662cb1a44ad36724df0c9