[INFO] cloning repository https://github.com/undefined-os/vfs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/undefined-os/vfs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundefined-os%2Fvfs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundefined-os%2Fvfs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6b361bce30a68985bb69a1245f76aeb516177d6
[INFO] checking undefined-os/vfs against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundefined-os%2Fvfs" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/undefined-os/vfs
[INFO] finished tweaking git repo https://github.com/undefined-os/vfs
[INFO] tweaked toml for git repo https://github.com/undefined-os/vfs written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/undefined-os/vfs 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 git repo https://github.com/undefined-os/vfs 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]      Locking 4 packages to latest Rust 1.95.0 compatible versions
[INFO] [stderr]       Adding num_enum v0.7.6
[INFO] [stderr]       Adding num_enum_derive v0.7.6
[INFO] [stderr]       Adding rustversion v1.0.22
[INFO] [stderr]       Adding syn v2.0.117
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded axerrno v0.1.0
[INFO] [stderr]   Downloaded inherit-methods-macro v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b522c2c6eaaac6b8e26066d691ea0a018416e1d1c13b1a00c0d20614895efc6f
[INFO] running `Command { std: "docker" "start" "-a" "b522c2c6eaaac6b8e26066d691ea0a018416e1d1c13b1a00c0d20614895efc6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b522c2c6eaaac6b8e26066d691ea0a018416e1d1c13b1a00c0d20614895efc6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b522c2c6eaaac6b8e26066d691ea0a018416e1d1c13b1a00c0d20614895efc6f", kill_on_drop: false }`
[INFO] [stdout] b522c2c6eaaac6b8e26066d691ea0a018416e1d1c13b1a00c0d20614895efc6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ad06a520d6d405288426d3cbdce55a874dedf7fb0e71b24897cef0a9ca3fb887
[INFO] running `Command { std: "docker" "start" "-a" "ad06a520d6d405288426d3cbdce55a874dedf7fb0e71b24897cef0a9ca3fb887", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling axerrno v0.1.0
[INFO] [stderr]     Checking bitflags v2.9.0
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ad06a520d6d405288426d3cbdce55a874dedf7fb0e71b24897cef0a9ca3fb887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad06a520d6d405288426d3cbdce55a874dedf7fb0e71b24897cef0a9ca3fb887", kill_on_drop: false }`
[INFO] [stdout] ad06a520d6d405288426d3cbdce55a874dedf7fb0e71b24897cef0a9ca3fb887