[INFO] updating cached repository https://github.com/AltOS-Rust/cm0-atomic
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cc0cfd61786e931535d03c962a0b10553630b470
[INFO] testing AltOS-Rust/cm0-atomic against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FAltOS-Rust%2Fcm0-atomic" "work/builds/worker-10/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AltOS-Rust/cm0-atomic on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/AltOS-Rust/cm0-atomic
[INFO] finished tweaking git repo https://github.com/AltOS-Rust/cm0-atomic
[INFO] tweaked toml for git repo https://github.com/AltOS-Rust/cm0-atomic written to work/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/AltOS-Rust/cm0-atomic already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 9872d721b214cde499f18b1eef470448d67a7389c33faae78d83ae2ef9eb47b8
[INFO] running `"docker" "start" "-a" "9872d721b214cde499f18b1eef470448d67a7389c33faae78d83ae2ef9eb47b8"`
[INFO] [stderr]    Compiling cm0_atomic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | #![feature(asm)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | #![feature(const_fn)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/arm.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | / macro_rules! __start_critical {
[INFO] [stderr] 19 | |     () => {{
[INFO] [stderr] 20 | |         unsafe {
[INFO] [stderr] 21 | |             let primask: u32;
[INFO] [stderr] ...  |
[INFO] [stderr] 34 | |     }}
[INFO] [stderr] 35 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/arm.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | / macro_rules! __end_critical {
[INFO] [stderr] 38 | |     ($var:ident) => {{
[INFO] [stderr] 39 | |         unsafe {
[INFO] [stderr] 40 | |             asm!("msr PRIMASK, $0"
[INFO] [stderr] ...  |
[INFO] [stderr] 46 | |     }}
[INFO] [stderr] 47 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `cm0_atomic`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9872d721b214cde499f18b1eef470448d67a7389c33faae78d83ae2ef9eb47b8"`
[INFO] running `"docker" "rm" "-f" "9872d721b214cde499f18b1eef470448d67a7389c33faae78d83ae2ef9eb47b8"`
[INFO] [stdout] 9872d721b214cde499f18b1eef470448d67a7389c33faae78d83ae2ef9eb47b8