[INFO] fetching crate kelvin 0.16.0...
[INFO] testing kelvin-0.16.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate kelvin 0.16.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate kelvin 0.16.0 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 kelvin 0.16.0
[INFO] finished tweaking crates.io crate kelvin 0.16.0
[INFO] tweaked toml for crates.io crate kelvin 0.16.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 0a32243619468a295a3d688057c8312057e677cb3b45d97fea4ae338f2bf4e8d
[INFO] running `"docker" "start" "-a" "0a32243619468a295a3d688057c8312057e677cb3b45d97fea4ae338f2bf4e8d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling seahash v3.0.7
[INFO] [stderr]    Compiling stable-heap v0.1.0
[INFO] [stderr]    Compiling parking_lot v0.4.8
[INFO] [stderr]    Compiling atomicwrites v0.2.5
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling derive_arbitrary v0.3.3
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling quickcheck v0.8.5
[INFO] [stderr]    Compiling cache v0.2.0
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling blake2-rfc v0.2.18
[INFO] [stderr]    Compiling appendix v0.2.0
[INFO] [stderr]    Compiling bytehash v0.3.0
[INFO] [stderr]    Compiling arbitrary v0.3.3
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling kelvin v0.16.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.04s
[INFO] running `"docker" "inspect" "0a32243619468a295a3d688057c8312057e677cb3b45d97fea4ae338f2bf4e8d"`
[INFO] running `"docker" "rm" "-f" "0a32243619468a295a3d688057c8312057e677cb3b45d97fea4ae338f2bf4e8d"`
[INFO] [stdout] 0a32243619468a295a3d688057c8312057e677cb3b45d97fea4ae338f2bf4e8d
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5e9c7abfa90e3a99b5e573a5df1b80d028952e6dfcd8323ee5a562579d97c47f
[INFO] running `"docker" "start" "-a" "5e9c7abfa90e3a99b5e573a5df1b80d028952e6dfcd8323ee5a562579d97c47f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling kelvin v0.16.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `kelvin_hamt`
[INFO] [stderr]  --> tests/nth.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use kelvin_hamt::HAMT;
[INFO] [stderr]   |     ^^^^^^^^^^^ use of undeclared type or module `kelvin_hamt`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `GetNth`
[INFO] [stderr]  --> tests/nth.rs:1:40
[INFO] [stderr]   |
[INFO] [stderr] 1 | use kelvin::annotations::{Cardinality, GetNth};
[INFO] [stderr]   |                                        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `LeafIterable`
[INFO] [stderr]  --> tests/nth.rs:2:23
[INFO] [stderr]   |
[INFO] [stderr] 2 | use kelvin::{Blake2b, LeafIterable};
[INFO] [stderr]   |                       ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `kelvin`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0432]: unresolved import `kelvin_hamt`
[INFO] [stderr]  --> tests/proof.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use kelvin_hamt::{HAMTSearch, NarrowHAMT};
[INFO] [stderr]   |     ^^^^^^^^^^^ use of undeclared type or module `kelvin_hamt`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `kelvin_hamt`
[INFO] [stderr]  --> tests/root_hash.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use kelvin_hamt::HAMT;
[INFO] [stderr]   |     ^^^^^^^^^^^ use of undeclared type or module `kelvin_hamt`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Compound`
[INFO] [stderr]  --> tests/proof.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use kelvin::{Blake2b, Compound, VoidAnnotation, KV};
[INFO] [stderr]   |                       ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `kelvin`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no method named `hash` found for struct `kelvin::store::Snapshot<_, _>` in the current scope
[INFO] [stderr]   --> tests/root_hash.rs:20:33
[INFO] [stderr]    |
[INFO] [stderr] 20 |     assert_eq!(&root_hash, snap.hash());
[INFO] [stderr]    |                                 ^^^^ private field, not a method
[INFO] [stderr]    |
[INFO] [stderr]    = note: `snap` is a function, perhaps you wish to call it
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Compound`
[INFO] [stderr]  --> tests/root_hash.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use kelvin::{Blake2b, Compound, Store, VoidAnnotation};
[INFO] [stderr]   |                       ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `kelvin`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "5e9c7abfa90e3a99b5e573a5df1b80d028952e6dfcd8323ee5a562579d97c47f"`
[INFO] running `"docker" "rm" "-f" "5e9c7abfa90e3a99b5e573a5df1b80d028952e6dfcd8323ee5a562579d97c47f"`
[INFO] [stdout] 5e9c7abfa90e3a99b5e573a5df1b80d028952e6dfcd8323ee5a562579d97c47f