[INFO] fetching crate rialight_filesystem 1.4.0...
[INFO] testing rialight_filesystem-1.4.0 against 1.95.0 for beta-1.96-2
[INFO] extracting crate rialight_filesystem 1.4.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate rialight_filesystem 1.4.0
[INFO] finished tweaking crates.io crate rialight_filesystem 1.4.0
[INFO] tweaked toml for crates.io crate rialight_filesystem 1.4.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rialight_filesystem 1.4.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 56 packages to latest compatible versions
[INFO] [stderr]       Adding dirs v4.0.0 (available: v6.0.0)
[INFO] [stderr]       Adding lazy-regex v2.5.0 (available: v3.6.0)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded lazy-regex v2.5.0
[INFO] [stderr]   Downloaded rialight_util v1.6.1
[INFO] [stderr]   Downloaded lazy-regex-proc_macros v2.4.1
[INFO] [stderr]   Downloaded rialight_temporal v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 44fb2bbe78d35a4e920e4d74e86377ab71facda13a920a94538aeb0f37130a7a
[INFO] running `Command { std: "docker" "start" "-a" "44fb2bbe78d35a4e920e4d74e86377ab71facda13a920a94538aeb0f37130a7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "44fb2bbe78d35a4e920e4d74e86377ab71facda13a920a94538aeb0f37130a7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44fb2bbe78d35a4e920e4d74e86377ab71facda13a920a94538aeb0f37130a7a", kill_on_drop: false }`
[INFO] [stdout] 44fb2bbe78d35a4e920e4d74e86377ab71facda13a920a94538aeb0f37130a7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b28470f71c404bb254da430181cb3e032b366ded2047829c45a2bc1fc5c3960
[INFO] running `Command { std: "docker" "start" "-a" "2b28470f71c404bb254da430181cb3e032b366ded2047829c45a2bc1fc5c3960", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling tokio v1.52.1
[INFO] [stderr]    Compiling chrono v0.4.44
[INFO] [stderr]    Compiling dirs v4.0.0
[INFO] [stderr]    Compiling rialight_temporal v1.0.0
[INFO] [stderr]    Compiling lazy-regex-proc_macros v2.4.1
[INFO] [stderr]    Compiling lazy-regex v2.5.0
[INFO] [stderr]    Compiling rialight_util v1.6.1
[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/rialight_util-1.6.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(decl_macro)]
[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 `rialight_util` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "2b28470f71c404bb254da430181cb3e032b366ded2047829c45a2bc1fc5c3960", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b28470f71c404bb254da430181cb3e032b366ded2047829c45a2bc1fc5c3960", kill_on_drop: false }`
[INFO] [stdout] 2b28470f71c404bb254da430181cb3e032b366ded2047829c45a2bc1fc5c3960
