[INFO] cloning repository https://github.com/PrismaPhonic/Concurrent-Arena-Allocator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PrismaPhonic/Concurrent-Arena-Allocator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPrismaPhonic%2FConcurrent-Arena-Allocator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPrismaPhonic%2FConcurrent-Arena-Allocator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 37e9c08442091c4e4b16d7c523d95c3e177497b2
[INFO] checking PrismaPhonic/Concurrent-Arena-Allocator against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPrismaPhonic%2FConcurrent-Arena-Allocator" "/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/PrismaPhonic/Concurrent-Arena-Allocator
[INFO] finished tweaking git repo https://github.com/PrismaPhonic/Concurrent-Arena-Allocator
[INFO] tweaked toml for git repo https://github.com/PrismaPhonic/Concurrent-Arena-Allocator written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/PrismaPhonic/Concurrent-Arena-Allocator 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/PrismaPhonic/Concurrent-Arena-Allocator 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 clap v4.5.51
[INFO] [stderr]   Downloaded clap_builder v4.5.51
[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] a5676ca1da353e97a8ea776ed772ea0a2fdeafc3ca5691333823a63c0269018c
[INFO] running `Command { std: "docker" "start" "-a" "a5676ca1da353e97a8ea776ed772ea0a2fdeafc3ca5691333823a63c0269018c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5676ca1da353e97a8ea776ed772ea0a2fdeafc3ca5691333823a63c0269018c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5676ca1da353e97a8ea776ed772ea0a2fdeafc3ca5691333823a63c0269018c", kill_on_drop: false }`
[INFO] [stdout] a5676ca1da353e97a8ea776ed772ea0a2fdeafc3ca5691333823a63c0269018c
[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] c0330ccced60ff3e82702dbd56cc9344ea2f35553779aeb63e40cc5510c4f3fe
[INFO] running `Command { std: "docker" "start" "-a" "c0330ccced60ff3e82702dbd56cc9344ea2f35553779aeb63e40cc5510c4f3fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]     Checking memchr v2.7.6
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking clap_builder v4.5.51
[INFO] [stderr]     Checking regex-automata v0.4.13
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking futures-io v0.3.31
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking oorandom v11.1.5
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking is-terminal v0.4.17
[INFO] [stderr]     Checking clap v4.5.51
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]     Checking regex v1.12.2
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]    Compiling zerocopy-derive v0.8.27
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]     Checking tokio v1.48.0
[INFO] [stderr]     Checking concurrent-arenas v0.1.0 (/opt/rustwide/workdir)
[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(allocator_api)]
[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 `concurrent-arenas` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c0330ccced60ff3e82702dbd56cc9344ea2f35553779aeb63e40cc5510c4f3fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0330ccced60ff3e82702dbd56cc9344ea2f35553779aeb63e40cc5510c4f3fe", kill_on_drop: false }`
[INFO] [stdout] c0330ccced60ff3e82702dbd56cc9344ea2f35553779aeb63e40cc5510c4f3fe
