[INFO] fetching crate slabmalloc 0.11.0...
[INFO] testing slabmalloc-0.11.0 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate slabmalloc 0.11.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate slabmalloc 0.11.0
[INFO] finished tweaking crates.io crate slabmalloc 0.11.0
[INFO] tweaked toml for crates.io crate slabmalloc 0.11.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate slabmalloc 0.11.0 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate slabmalloc 0.11.0 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_hc v0.3.0
[INFO] [stderr]   Downloaded rand_core v0.6.2
[INFO] [stderr]   Downloaded spin v0.9.0
[INFO] [stderr]   Downloaded rand v0.8.3
[INFO] [stderr]   Downloaded rand_chacha v0.3.0
[INFO] [stderr]   Downloaded lock_api v0.4.4
[INFO] [stderr]   Downloaded hermit-abi v0.1.18
[INFO] [stderr]   Downloaded libc v0.2.95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930
[INFO] running `Command { std: "docker" "start" "2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling slabmalloc v0.11.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:21:35
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![cfg_attr(feature = "unstable", feature(const_mut_refs))]
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[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] warning: the feature `const_mut_refs` has been stable since 1.83.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:21:43
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![cfg_attr(feature = "unstable", feature(const_mut_refs))]
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl u64>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> src/pages.rs:36:43
[INFO] [stdout]    |
[INFO] [stdout] 36 |             *bitmap = AtomicU64::new(u64::max_value());
[INFO] [stdout]    |                                           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl u64>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> src/pages.rs:59:31
[INFO] [stdout]    |
[INFO] [stdout] 59 |             if bitval == u64::max_value() {
[INFO] [stdout]    |                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl u64>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/pages.rs:120:60
[INFO] [stdout]     |
[INFO] [stdout] 120 |             .filter(|&x| x.load(Ordering::Relaxed) != u64::max_value())
[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 `slabmalloc` (lib) due to 1 previous error; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930", kill_on_drop: false }`
[INFO] [stdout] 2e4c35e61507398b99534020282a2066e131f5f2bb236746a1f9c94349824930
