[INFO] fetching crate kelvin 0.19.0...
[INFO] checking kelvin-0.19.0 against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] extracting crate kelvin 0.19.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate kelvin 0.19.0 on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kelvin 0.19.0
[INFO] finished tweaking crates.io crate kelvin 0.19.0
[INFO] tweaked toml for crates.io crate kelvin 0.19.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8440aafb6e29aca1d7308768d0603bc425b121e3c8b92c33423dd291c78475ff
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8440aafb6e29aca1d7308768d0603bc425b121e3c8b92c33423dd291c78475ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8440aafb6e29aca1d7308768d0603bc425b121e3c8b92c33423dd291c78475ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8440aafb6e29aca1d7308768d0603bc425b121e3c8b92c33423dd291c78475ff", kill_on_drop: false }`
[INFO] [stdout] 8440aafb6e29aca1d7308768d0603bc425b121e3c8b92c33423dd291c78475ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e07f2cca3dea80d785288918ec041fe38520b93ae6f7f328d0a7f95b9afa4cb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7e07f2cca3dea80d785288918ec041fe38520b93ae6f7f328d0a7f95b9afa4cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking seahash v3.0.7
[INFO] [stderr]     Checking stable-heap v0.1.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking bytehash v0.3.0
[INFO] [stderr]     Checking cache v0.2.0
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking appendix v0.2.0
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking atomicwrites v0.2.5
[INFO] [stderr]     Checking quickcheck v0.8.5
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling derive_arbitrary v0.3.3
[INFO] [stderr]     Checking arbitrary v0.3.3
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking kelvin v0.19.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `kelvin_hamt`
[INFO] [stdout]  --> tests/proof.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use kelvin_hamt::{HAMTSearch, NarrowHAMT};
[INFO] [stdout]   |     ^^^^^^^^^^^ use of undeclared type or module `kelvin_hamt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `kelvin_hamt`
[INFO] [stdout]  --> tests/nth.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use kelvin_hamt::HAMT;
[INFO] [stdout]   |     ^^^^^^^^^^^ use of undeclared type or module `kelvin_hamt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `GetNth`
[INFO] [stdout]  --> tests/nth.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use kelvin::annotations::{Cardinality, GetNth};
[INFO] [stdout]   |                                        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LeafIterable`
[INFO] [stdout]  --> tests/nth.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use kelvin::{Blake2b, LeafIterable};
[INFO] [stdout]   |                       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kelvin`.
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `Compound`
[INFO] [stdout]  --> tests/proof.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use kelvin::{Blake2b, Compound, Void, KV};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `kelvin_hamt`
[INFO] [stdout]  --> tests/root_hash.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use kelvin_hamt::HAMT;
[INFO] [stdout]   |     ^^^^^^^^^^^ use of undeclared type or module `kelvin_hamt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `hash` found for struct `kelvin::Snapshot<_, _>` in the current scope
[INFO] [stdout]   --> tests/root_hash.rs:20:33
[INFO] [stdout]    |
[INFO] [stdout] 20 |     assert_eq!(&root_hash, snap.hash());
[INFO] [stdout]    |                                 ^^^^ private field, not a method
[INFO] [stdout]    |
[INFO] [stdout]    = note: `snap` is a function, perhaps you wish to call it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Compound`
[INFO] [stdout]  --> tests/root_hash.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use kelvin::{Blake2b, Compound, Store, Void};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7e07f2cca3dea80d785288918ec041fe38520b93ae6f7f328d0a7f95b9afa4cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e07f2cca3dea80d785288918ec041fe38520b93ae6f7f328d0a7f95b9afa4cb", kill_on_drop: false }`
[INFO] [stdout] 7e07f2cca3dea80d785288918ec041fe38520b93ae6f7f328d0a7f95b9afa4cb