[INFO] fetching crate mmr-crypto-primitives 0.2.1...
[INFO] checking mmr-crypto-primitives-0.2.1 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate mmr-crypto-primitives 0.2.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate mmr-crypto-primitives 0.2.1 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mmr-crypto-primitives 0.2.1
[INFO] finished tweaking crates.io crate mmr-crypto-primitives 0.2.1
[INFO] tweaked toml for crates.io crate mmr-crypto-primitives 0.2.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 80 packages to latest compatible versions
[INFO] [stderr]       Adding ark-bls12-377 v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-bls12-381 v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-ec v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-ed-on-bls12-381 v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-ff v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-ff-asm v0.3.0 (latest: v0.4.2)
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[INFO] [stderr]       Adding ark-r1cs-std v0.3.1 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-relations v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-serialize v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-serialize-derive v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-snark v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-std v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding blake2 v0.9.2 (latest: v0.10.6)
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding crypto-mac v0.8.0 (latest: v0.11.1)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding rustc_version v0.3.3 (latest: v0.4.0)
[INFO] [stderr]       Adding semver v0.11.0 (latest: v1.0.22)
[INFO] [stderr]       Adding sha2 v0.9.9 (latest: v0.10.8)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.60)
[INFO] [stderr]       Adding tracing-subscriber v0.2.25 (latest: v0.3.18)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.5)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ark-sponge v0.3.0
[INFO] [stderr]   Downloaded ark-mnt6-298 v0.3.0
[INFO] [stderr]   Downloaded ark-bls12-377 v0.3.0
[INFO] [stderr]   Downloaded ark-mnt4-298 v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fbfc0d219e4a7781d7205ae0ad17e0efa07935e8250c27f78b865f445d416a35
[INFO] running `Command { std: "docker" "start" "-a" "fbfc0d219e4a7781d7205ae0ad17e0efa07935e8250c27f78b865f445d416a35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fbfc0d219e4a7781d7205ae0ad17e0efa07935e8250c27f78b865f445d416a35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbfc0d219e4a7781d7205ae0ad17e0efa07935e8250c27f78b865f445d416a35", kill_on_drop: false }`
[INFO] [stdout] fbfc0d219e4a7781d7205ae0ad17e0efa07935e8250c27f78b865f445d416a35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d9430de9649a5e2d4ca704a7228d4e06a1ad152337afef51980f64d90c0b602
[INFO] running `Command { std: "docker" "start" "-a" "3d9430de9649a5e2d4ca704a7228d4e06a1ad152337afef51980f64d90c0b602", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling thiserror v1.0.59
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]    Compiling syn v2.0.60
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking opaque-debug v0.3.1
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]     Checking ark-std v0.3.0
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking blake2 v0.9.2
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]    Compiling thiserror-impl v1.0.59
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling ark-serialize-derive v0.3.0
[INFO] [stderr]    Compiling ark-ff-macros v0.3.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling ark-ff-asm v0.3.0
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]     Checking ark-serialize v0.3.0
[INFO] [stderr]    Compiling pest v2.7.10
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling ark-ff v0.3.0
[INFO] [stderr]     Checking ark-ec v0.3.0
[INFO] [stderr]     Checking ark-relations v0.3.0
[INFO] [stderr]     Checking ark-snark v0.3.0
[INFO] [stderr]     Checking ark-r1cs-std v0.3.1
[INFO] [stderr]     Checking ark-bls12-381 v0.3.0
[INFO] [stderr]     Checking ark-sponge v0.3.0
[INFO] [stderr]     Checking mmr-crypto-primitives v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: associated items `new` and `clone` are never used
[INFO] [stdout]    --> src/mmr/mmr_store.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub trait MMRStore<Elem>: Clone + Sized {
[INFO] [stdout]     |           -------- associated items in this trait
[INFO] [stdout] 113 |     fn new() -> Result<Self> where Self: Sized;
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn clone(&self) -> Result<Self> where Self: Sized;
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:3:5
[INFO] [stdout]     |
[INFO] [stdout] 3   |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[deny(dead_code)]` implied by `#[deny(unused)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mmr-crypto-primitives` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3d9430de9649a5e2d4ca704a7228d4e06a1ad152337afef51980f64d90c0b602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d9430de9649a5e2d4ca704a7228d4e06a1ad152337afef51980f64d90c0b602", kill_on_drop: false }`
[INFO] [stdout] 3d9430de9649a5e2d4ca704a7228d4e06a1ad152337afef51980f64d90c0b602
[INFO] checking mmr-crypto-primitives-0.2.1 against try#9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88 for pr-124157
[INFO] extracting crate mmr-crypto-primitives 0.2.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate mmr-crypto-primitives 0.2.1 on toolchain 9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mmr-crypto-primitives 0.2.1
[INFO] finished tweaking crates.io crate mmr-crypto-primitives 0.2.1
[INFO] tweaked toml for crates.io crate mmr-crypto-primitives 0.2.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 80 packages to latest compatible versions
[INFO] [stderr]       Adding ark-bls12-377 v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-bls12-381 v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-ec v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-ed-on-bls12-381 v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-ff v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-ff-asm v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-ff-macros v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-mnt4-298 v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-mnt6-298 v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-r1cs-std v0.3.1 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-relations v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-serialize v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-serialize-derive v0.3.0 (latest: v0.4.2)
[INFO] [stderr]       Adding ark-snark v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding ark-std v0.3.0 (latest: v0.4.0)
[INFO] [stderr]       Adding blake2 v0.9.2 (latest: v0.10.6)
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding crypto-mac v0.8.0 (latest: v0.11.1)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding rustc_version v0.3.3 (latest: v0.4.0)
[INFO] [stderr]       Adding semver v0.11.0 (latest: v1.0.22)
[INFO] [stderr]       Adding sha2 v0.9.9 (latest: v0.10.8)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.60)
[INFO] [stderr]       Adding tracing-subscriber v0.2.25 (latest: v0.3.18)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.5)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.5)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 362125824a24d14eca0ce8171a02c738d77b6a866a2dfb6bf6b217b1e510acc9
[INFO] running `Command { std: "docker" "start" "-a" "362125824a24d14eca0ce8171a02c738d77b6a866a2dfb6bf6b217b1e510acc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "362125824a24d14eca0ce8171a02c738d77b6a866a2dfb6bf6b217b1e510acc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "362125824a24d14eca0ce8171a02c738d77b6a866a2dfb6bf6b217b1e510acc9", kill_on_drop: false }`
[INFO] [stdout] 362125824a24d14eca0ce8171a02c738d77b6a866a2dfb6bf6b217b1e510acc9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3560727cf961406d0955a8a5e35d91ce072ceb807bb4af385f004aa98b05aa71
[INFO] running `Command { std: "docker" "start" "-a" "3560727cf961406d0955a8a5e35d91ce072ceb807bb4af385f004aa98b05aa71", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling thiserror v1.0.59
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling syn v2.0.60
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking opaque-debug v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking ark-std v0.3.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking blake2 v0.9.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.59
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling ark-serialize-derive v0.3.0
[INFO] [stderr]    Compiling ark-ff-asm v0.3.0
[INFO] [stderr]    Compiling ark-ff-macros v0.3.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]     Checking ark-serialize v0.3.0
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]    Compiling pest v2.7.10
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling ark-ff v0.3.0
[INFO] [stderr]     Checking ark-ec v0.3.0
[INFO] [stderr]     Checking ark-relations v0.3.0
[INFO] [stderr]     Checking ark-snark v0.3.0
[INFO] [stderr]     Checking ark-r1cs-std v0.3.1
[INFO] [stderr]     Checking ark-sponge v0.3.0
[INFO] [stderr]     Checking ark-bls12-381 v0.3.0
[INFO] [stderr]     Checking mmr-crypto-primitives v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: associated items `new` and `clone` are never used
[INFO] [stdout]    --> src/mmr/mmr_store.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub trait MMRStore<Elem>: Clone + Sized {
[INFO] [stdout]     |           -------- associated items in this trait
[INFO] [stdout] 113 |     fn new() -> Result<Self> where Self: Sized;
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn clone(&self) -> Result<Self> where Self: Sized;
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:3:5
[INFO] [stdout]     |
[INFO] [stdout] 3   |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[deny(dead_code)]` implied by `#[deny(unused)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mmr-crypto-primitives` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3560727cf961406d0955a8a5e35d91ce072ceb807bb4af385f004aa98b05aa71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3560727cf961406d0955a8a5e35d91ce072ceb807bb4af385f004aa98b05aa71", kill_on_drop: false }`
[INFO] [stdout] 3560727cf961406d0955a8a5e35d91ce072ceb807bb4af385f004aa98b05aa71
