[INFO] cloning repository https://github.com/gregghy/little_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gregghy/little_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregghy%2Flittle_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregghy%2Flittle_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52ccb23f78da2008506de0019b23075f47145189
[INFO] testing gregghy/little_os against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregghy%2Flittle_os" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/gregghy/little_os
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/gregghy/little_os
[INFO] tweaked toml for git repo https://github.com/gregghy/little_os written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gregghy/little_os 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 git repo https://github.com/gregghy/little_os 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-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cc203b9d720875fb9a1824c362ea1e497032581b7f98f66097de0bf16b8fe62
[INFO] running `Command { std: "docker" "start" "-a" "0cc203b9d720875fb9a1824c362ea1e497032581b7f98f66097de0bf16b8fe62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cc203b9d720875fb9a1824c362ea1e497032581b7f98f66097de0bf16b8fe62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cc203b9d720875fb9a1824c362ea1e497032581b7f98f66097de0bf16b8fe62", kill_on_drop: false }`
[INFO] [stdout] 0cc203b9d720875fb9a1824c362ea1e497032581b7f98f66097de0bf16b8fe62
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80b4d55854f92ae995760070df696aa5c3bc463796ef730ceb6ab37746677e4c
[INFO] running `Command { std: "docker" "start" "-a" "80b4d55854f92ae995760070df696aa5c3bc463796ef730ceb6ab37746677e4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]    Compiling bit_field v0.10.2
[INFO] [stderr]    Compiling volatile v0.4.6
[INFO] [stderr]    Compiling bootloader v0.9.23
[INFO] [stderr]    Compiling bitflags v2.4.1
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling x86_64 v0.14.11
[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_64-0.14.11/src/lib.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "const_fn", feature(const_mut_refs))] // GDT add_entry()
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `const_mut_refs` has been stable since `1.83.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0053]: method `steps_between` has an incompatible type for trait
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.14.11/src/addr.rs:382:51
[INFO] [stdout]     |
[INFO] [stdout] 382 |     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^ expected `(usize, Option<usize>)`, found `Option<usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&addr::VirtAddr, &addr::VirtAddr) -> (usize, Option<usize>)`
[INFO] [stdout]                found signature `fn(&addr::VirtAddr, &addr::VirtAddr) -> Option<usize>`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]     |
[INFO] [stdout] 382 -     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout] 382 +     fn steps_between(start: &Self, end: &Self) -> (usize, Option<usize>) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0053]: method `steps_between` has an incompatible type for trait
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/x86_64-0.14.11/src/structures/paging/page.rs:288:51
[INFO] [stdout]     |
[INFO] [stdout] 288 |     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^ expected `(usize, Option<usize>)`, found `Option<usize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&Page<_>, &Page<_>) -> (usize, Option<usize>)`
[INFO] [stdout]                found signature `fn(&Page<_>, &Page<_>) -> Option<usize>`
[INFO] [stdout] help: change the output type to match the trait
[INFO] [stdout]     |
[INFO] [stdout] 288 -     fn steps_between(start: &Self, end: &Self) -> Option<usize> {
[INFO] [stdout] 288 +     fn steps_between(start: &Self, end: &Self) -> (usize, Option<usize>) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0053, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0053`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x86_64` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "80b4d55854f92ae995760070df696aa5c3bc463796ef730ceb6ab37746677e4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80b4d55854f92ae995760070df696aa5c3bc463796ef730ceb6ab37746677e4c", kill_on_drop: false }`
[INFO] [stdout] 80b4d55854f92ae995760070df696aa5c3bc463796ef730ceb6ab37746677e4c
