[INFO] fetching crate ember_os 0.1.3...
[INFO] testing ember_os-0.1.3 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate ember_os 0.1.3 into /workspace/builds/worker-3-tc2/source
[INFO] removed /workspace/builds/worker-3-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate ember_os 0.1.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate ember_os 0.1.3
[INFO] tweaked toml for crates.io crate ember_os 0.1.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ember_os 0.1.3 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ember_os 0.1.3 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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b08b071f7190eb763e24841f04e66a08c342e9c25cbebf753d85ff04f949986
[INFO] running `Command { std: "docker" "start" "-a" "1b08b071f7190eb763e24841f04e66a08c342e9c25cbebf753d85ff04f949986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b08b071f7190eb763e24841f04e66a08c342e9c25cbebf753d85ff04f949986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b08b071f7190eb763e24841f04e66a08c342e9c25cbebf753d85ff04f949986", kill_on_drop: false }`
[INFO] [stdout] 1b08b071f7190eb763e24841f04e66a08c342e9c25cbebf753d85ff04f949986
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00e01bbce5fbd29b6e5d24517346319bb102a6a0e2cb1bc8e1dbc707ef21070f
[INFO] running `Command { std: "docker" "start" "-a" "00e01bbce5fbd29b6e5d24517346319bb102a6a0e2cb1bc8e1dbc707ef21070f", kill_on_drop: false }`
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling x86 v0.52.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling raw-cpuid v10.7.0
[INFO] [stderr]    Compiling volatile v0.4.6
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling bootloader v0.9.28
[INFO] [stderr]    Compiling hashbrown v0.15.2
[INFO] [stderr]    Compiling conquer-util v0.3.0
[INFO] [stderr]    Compiling conquer-once v0.4.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling spinning_top v0.2.5
[INFO] [stderr]    Compiling linked_list_allocator v0.10.5
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling pc-keyboard v0.8.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling x86_64 v0.15.2
[INFO] [stderr]    Compiling lru v0.12.5
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.15.2/src/lib.rs:5:44
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "abi_x86_interrupt", feature(abi_x86_interrupt))]
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.15.2/src/lib.rs:6:37
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "step_trait", feature(step_trait))]
[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 `x86_64` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "00e01bbce5fbd29b6e5d24517346319bb102a6a0e2cb1bc8e1dbc707ef21070f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00e01bbce5fbd29b6e5d24517346319bb102a6a0e2cb1bc8e1dbc707ef21070f", kill_on_drop: false }`
[INFO] [stdout] 00e01bbce5fbd29b6e5d24517346319bb102a6a0e2cb1bc8e1dbc707ef21070f