[INFO] fetching crate stupidalloc 0.2.2...
[INFO] testing stupidalloc-0.2.2 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate stupidalloc 0.2.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate stupidalloc 0.2.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate stupidalloc 0.2.2
[INFO] tweaked toml for crates.io crate stupidalloc 0.2.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stupidalloc 0.2.2 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate stupidalloc 0.2.2 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d092b123fcbaf6ad226bd71e90e7f87800255a00328bd8f071a06a1ae354c344
[INFO] running `Command { std: "docker" "start" "-a" "d092b123fcbaf6ad226bd71e90e7f87800255a00328bd8f071a06a1ae354c344", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d092b123fcbaf6ad226bd71e90e7f87800255a00328bd8f071a06a1ae354c344", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d092b123fcbaf6ad226bd71e90e7f87800255a00328bd8f071a06a1ae354c344", kill_on_drop: false }`
[INFO] [stdout] d092b123fcbaf6ad226bd71e90e7f87800255a00328bd8f071a06a1ae354c344
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b78eac2cde5f6fe32e92ce73eb48043a83f8e786645b521b2ae1d051a021853
[INFO] running `Command { std: "docker" "start" "-a" "7b78eac2cde5f6fe32e92ce73eb48043a83f8e786645b521b2ae1d051a021853", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling zerocopy v0.7.32
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling allocator-api2 v0.2.16
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling memmap2 v0.7.1
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling stupidalloc v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:104:1
[INFO] [stdout]     |
[INFO] [stdout] 104 | #![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 `stupidalloc` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "7b78eac2cde5f6fe32e92ce73eb48043a83f8e786645b521b2ae1d051a021853", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b78eac2cde5f6fe32e92ce73eb48043a83f8e786645b521b2ae1d051a021853", kill_on_drop: false }`
[INFO] [stdout] 7b78eac2cde5f6fe32e92ce73eb48043a83f8e786645b521b2ae1d051a021853
