[INFO] fetching crate saltine-core 0.3.0...
[INFO] testing saltine-core-0.3.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate saltine-core 0.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate saltine-core 0.3.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate saltine-core 0.3.0
[INFO] tweaked toml for crates.io crate saltine-core 0.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate saltine-core 0.3.0 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 saltine-core 0.3.0 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f808407d88ec66684b6beaa094951316c6018be59c998f9fb09c719d6ca3809d
[INFO] running `Command { std: "docker" "start" "-a" "f808407d88ec66684b6beaa094951316c6018be59c998f9fb09c719d6ca3809d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f808407d88ec66684b6beaa094951316c6018be59c998f9fb09c719d6ca3809d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f808407d88ec66684b6beaa094951316c6018be59c998f9fb09c719d6ca3809d", kill_on_drop: false }`
[INFO] [stdout] f808407d88ec66684b6beaa094951316c6018be59c998f9fb09c719d6ca3809d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a68c469ea1d04512012536582200d1198301d2295b51f7ac9b8fa98cc5f5c67d
[INFO] running `Command { std: "docker" "start" "-a" "a68c469ea1d04512012536582200d1198301d2295b51f7ac9b8fa98cc5f5c67d", kill_on_drop: false }`
[INFO] [stderr]    Compiling siphasher v1.0.2
[INFO] [stderr]    Compiling fastrand v2.4.1
[INFO] [stderr]    Compiling rand_core v0.10.0
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling anyhow v1.0.102
[INFO] [stderr]    Compiling cpufeatures v0.3.0
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling chacha20 v0.10.0
[INFO] [stderr]    Compiling phf_shared v0.13.1
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling rand v0.10.0
[INFO] [stderr]    Compiling phf_generator v0.13.1
[INFO] [stderr]    Compiling phf_codegen v0.13.1
[INFO] [stderr]    Compiling indexmap v2.13.1
[INFO] [stderr]    Compiling saltine-core v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling ordermap v1.1.0
[INFO] [stderr]    Compiling phf_macros v0.13.1
[INFO] [stderr]    Compiling phf v0.13.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(associated_type_defaults)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `saltine-core` (lib) due to 1 previous error
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name saltine_core --edition=2024 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("caseless", "unchecked"))' -C metadata=8f159fe4883556e5 -C extra-filename=-e16a6594c88e0cf9 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-b0726fbe6d61d750.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-1e0056997c3d0872.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-e658f8325bd83daf.rmeta --extern ordermap=/opt/rustwide/target/debug/deps/libordermap-55361b555b46a985.rmeta --extern phf=/opt/rustwide/target/debug/deps/libphf-7cde263be2a14d19.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-d8ac2bc232a663da.rmeta --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "a68c469ea1d04512012536582200d1198301d2295b51f7ac9b8fa98cc5f5c67d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a68c469ea1d04512012536582200d1198301d2295b51f7ac9b8fa98cc5f5c67d", kill_on_drop: false }`
[INFO] [stdout] a68c469ea1d04512012536582200d1198301d2295b51f7ac9b8fa98cc5f5c67d
