[INFO] fetching crate tracing-allocator 0.1.0...
[INFO] testing tracing-allocator-0.1.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate tracing-allocator 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate tracing-allocator 0.1.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate tracing-allocator 0.1.0
[INFO] finished tweaking crates.io crate tracing-allocator 0.1.0
[INFO] tweaked toml for crates.io crate tracing-allocator 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b21b9b67d4c041b0b8508fba7274aa72ea287e86b972795ec861ea956b3a4290
[INFO] running `"docker" "start" "-a" "b21b9b67d4c041b0b8508fba7274aa72ea287e86b972795ec861ea956b3a4290"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling tracing-allocator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::heap`
[INFO] [stderr]   --> src/lib.rs:10:10
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::heap::{Alloc, System, Layout, AllocErr};
[INFO] [stderr]    |          ^^^^ could not find `heap` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(global_allocator, allocator_api, heap_api)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::atomic::ATOMIC_BOOL_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/lib.rs:11:37
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::atomic::ATOMIC_BOOL_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/lib.rs:15:37
[INFO] [stderr]    |
[INFO] [stderr] 15 | static TRACE_ACTIVATE: AtomicBool = ATOMIC_BOOL_INIT;
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `AtomicBool::new(false)`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/lib.rs:60:30
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let mut buf: [u8; 100] = mem::uninitialized();
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `tracing-allocator`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b21b9b67d4c041b0b8508fba7274aa72ea287e86b972795ec861ea956b3a4290"`
[INFO] running `"docker" "rm" "-f" "b21b9b67d4c041b0b8508fba7274aa72ea287e86b972795ec861ea956b3a4290"`
[INFO] [stdout] b21b9b67d4c041b0b8508fba7274aa72ea287e86b972795ec861ea956b3a4290