[INFO] crate buddy_system_allocator 0.4.0 is already in cache
[INFO] testing buddy_system_allocator-0.4.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate buddy_system_allocator 0.4.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate buddy_system_allocator 0.4.0 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 buddy_system_allocator 0.4.0
[INFO] finished tweaking crates.io crate buddy_system_allocator 0.4.0
[INFO] tweaked toml for crates.io crate buddy_system_allocator 0.4.0 written to /workspace/builds/worker-0/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] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 79a1ecb05d9a9af53c4650e1abce0f29d2bf85a2fd7b1963d531eb7ea7c8cd54
[INFO] running `"docker" "start" "-a" "79a1ecb05d9a9af53c4650e1abce0f29d2bf85a2fd7b1963d531eb7ea7c8cd54"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling buddy_system_allocator v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `alloc::alloc::Alloc`
[INFO] [stderr]   --> src/lib.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use alloc::alloc::Alloc;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^-----
[INFO] [stderr]    |     |             |
[INFO] [stderr]    |     |             help: a similar name exists in the module: `alloc`
[INFO] [stderr]    |     no `Alloc` in `alloc`
[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(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(alloc, allocator_api)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[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 `buddy_system_allocator`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "79a1ecb05d9a9af53c4650e1abce0f29d2bf85a2fd7b1963d531eb7ea7c8cd54"`
[INFO] running `"docker" "rm" "-f" "79a1ecb05d9a9af53c4650e1abce0f29d2bf85a2fd7b1963d531eb7ea7c8cd54"`
[INFO] [stdout] 79a1ecb05d9a9af53c4650e1abce0f29d2bf85a2fd7b1963d531eb7ea7c8cd54