[INFO] fetching crate axfs_vfs 0.1.2...
[INFO] checking axfs_vfs-0.1.2 against 1.95.0 for pr-155915
[INFO] extracting crate axfs_vfs 0.1.2 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate axfs_vfs 0.1.2
[INFO] finished tweaking crates.io crate axfs_vfs 0.1.2
[INFO] tweaked toml for crates.io crate axfs_vfs 0.1.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate axfs_vfs 0.1.2 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 axfs_vfs 0.1.2 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]  Downloading crates ...
[INFO] [stderr]   Downloaded axerrno v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] adbe867169bae9dcc5c203c3518f2ebbd38972a49917911562613f7654fe8ee7
[INFO] running `Command { std: "docker" "start" "-a" "adbe867169bae9dcc5c203c3518f2ebbd38972a49917911562613f7654fe8ee7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "adbe867169bae9dcc5c203c3518f2ebbd38972a49917911562613f7654fe8ee7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adbe867169bae9dcc5c203c3518f2ebbd38972a49917911562613f7654fe8ee7", kill_on_drop: false }`
[INFO] [stdout] adbe867169bae9dcc5c203c3518f2ebbd38972a49917911562613f7654fe8ee7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] e3d8f8180b32c490bc2eaea1955bbead6e7c5707f299314361a843ca519dba2d
[INFO] running `Command { std: "docker" "start" "-a" "e3d8f8180b32c490bc2eaea1955bbead6e7c5707f299314361a843ca519dba2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling axerrno v0.1.0
[INFO] [stderr]     Checking bitflags v2.9.1
[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/axerrno-0.1.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(variant_count)]
[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 `axerrno` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e3d8f8180b32c490bc2eaea1955bbead6e7c5707f299314361a843ca519dba2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3d8f8180b32c490bc2eaea1955bbead6e7c5707f299314361a843ca519dba2d", kill_on_drop: false }`
[INFO] [stdout] e3d8f8180b32c490bc2eaea1955bbead6e7c5707f299314361a843ca519dba2d