[INFO] fetching crate zone-alloc 0.4.4...
[INFO] testing zone-alloc-0.4.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate zone-alloc 0.4.4 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate zone-alloc 0.4.4
[INFO] finished tweaking crates.io crate zone-alloc 0.4.4
[INFO] tweaked toml for crates.io crate zone-alloc 0.4.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate zone-alloc 0.4.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate zone-alloc 0.4.4 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.87
[INFO] [stderr]   Downloaded unicode-ident v1.0.13
[INFO] [stderr]   Downloaded allocator-api2 v0.2.18
[INFO] [stderr]   Downloaded syn v2.0.79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8249223155affc953c59023e6de8d369aa3246265c123ece5896b36a12d1ce74
[INFO] running `Command { std: "docker" "start" "-a" "8249223155affc953c59023e6de8d369aa3246265c123ece5896b36a12d1ce74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8249223155affc953c59023e6de8d369aa3246265c123ece5896b36a12d1ce74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8249223155affc953c59023e6de8d369aa3246265c123ece5896b36a12d1ce74", kill_on_drop: false }`
[INFO] [stdout] 8249223155affc953c59023e6de8d369aa3246265c123ece5896b36a12d1ce74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01043a264e674c267ef3dd977a009f22ced0de23573333bf75eaff71bf04a3a5
[INFO] running `Command { std: "docker" "start" "-a" "01043a264e674c267ef3dd977a009f22ced0de23573333bf75eaff71bf04a3a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling zone-alloc v0.4.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:167:1
[INFO] [stdout]     |
[INFO] [stdout] 167 | #![feature(dropck_eyepatch)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:168:1
[INFO] [stdout]     |
[INFO] [stdout] 168 | #![feature(sync_unsafe_cell)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:169:1
[INFO] [stdout]     |
[INFO] [stdout] 169 | #![feature(trait_alias)]
[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 `zone-alloc` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "01043a264e674c267ef3dd977a009f22ced0de23573333bf75eaff71bf04a3a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01043a264e674c267ef3dd977a009f22ced0de23573333bf75eaff71bf04a3a5", kill_on_drop: false }`
[INFO] [stdout] 01043a264e674c267ef3dd977a009f22ced0de23573333bf75eaff71bf04a3a5