[INFO] fetching crate rs_merkle 1.4.1...
[INFO] checking rs_merkle-1.4.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rs_merkle 1.4.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate rs_merkle 1.4.1 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rs_merkle 1.4.1
[INFO] finished tweaking crates.io crate rs_merkle 1.4.1
[INFO] tweaked toml for crates.io crate rs_merkle 1.4.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb266f02f1ae13c072eeb792834fbdf421fab63b21c2d716ee0964b319ff2449
[INFO] running `Command { std: "docker" "start" "-a" "fb266f02f1ae13c072eeb792834fbdf421fab63b21c2d716ee0964b319ff2449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb266f02f1ae13c072eeb792834fbdf421fab63b21c2d716ee0964b319ff2449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb266f02f1ae13c072eeb792834fbdf421fab63b21c2d716ee0964b319ff2449", kill_on_drop: false }`
[INFO] [stdout] fb266f02f1ae13c072eeb792834fbdf421fab63b21c2d716ee0964b319ff2449
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4057ab618f49feb008114fc26c39eb73b4bfa3f3afb65ed2744f40d3df1b6872
[INFO] running `Command { std: "docker" "start" "-a" "4057ab618f49feb008114fc26c39eb73b4bfa3f3afb65ed2744f40d3df1b6872", kill_on_drop: false }`
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking rs_merkle v1.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/hasher.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::prelude::*;
[INFO] [stdout]   |     ----------------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/merkle_proof.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::prelude::*;
[INFO] [stdout]   |     ----------------- the item `TryFrom` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 8 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/prelude.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use alloc::boxed::Box;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/proof_serializers/direct_hashes_order.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{prelude::*, Error, Hasher, MerkleProof, MerkleProofSerializer};
[INFO] [stdout]   |             ---------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/proof_serializers/reverse_hashes_order.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{prelude::*, Error, Hasher, MerkleProof, MerkleProofSerializer};
[INFO] [stdout]   |             ---------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/hasher.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::prelude::*;
[INFO] [stdout]   |     ----------------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/merkle_proof.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::prelude::*;
[INFO] [stdout]   |     ----------------- the item `TryFrom` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 8 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::borrow::ToOwned`
[INFO] [stdout]  --> src/prelude.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub use alloc::borrow::ToOwned;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/prelude.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use alloc::boxed::Box;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TryFrom`, `TryInto`
[INFO] [stdout]   --> src/prelude.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use core::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                         ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::iter::FromIterator`
[INFO] [stdout]   --> src/prelude.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use core::iter::FromIterator;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/proof_serializers/direct_hashes_order.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{prelude::*, Error, Hasher, MerkleProof, MerkleProofSerializer};
[INFO] [stdout]   |             ---------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/proof_serializers/reverse_hashes_order.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{prelude::*, Error, Hasher, MerkleProof, MerkleProofSerializer};
[INFO] [stdout]   |             ---------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hasher`
[INFO] [stdout]  --> tests/merkle_proof_test.rs:6:48
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use rs_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]   |                                                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]   --> tests/merkle_tree_test.rs:70:41
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use rs_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::common`
[INFO] [stdout]    --> tests/merkle_proof_test.rs:139:9
[INFO] [stdout]     |
[INFO] [stdout] 139 |     use crate::common;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::common`
[INFO] [stdout]    --> tests/merkle_tree_test.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |     use crate::common;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expected_root`
[INFO] [stdout]   --> tests/merkle_proof_test.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let expected_root = test_data.expected_root_hex.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expected_root`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TestData48` is never constructed
[INFO] [stdout]   --> tests/common.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct TestData48 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `setup_sha384` is never used
[INFO] [stdout]   --> tests/common.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn setup_sha384() -> TestData48 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `leaf_values` is never read
[INFO] [stdout]  --> tests/common.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct TestData {
[INFO] [stdout]   |            -------- field in this struct
[INFO] [stdout] 8 |     pub leaf_values: Vec<String>,
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `leaf_values` is never read
[INFO] [stdout]   --> tests/common.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct TestData48 {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 14 |     pub leaf_values: Vec<String>,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `combine` is never used
[INFO] [stdout]   --> tests/common.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn combine<T: Clone>(active: Vec<T>, rest: Vec<T>, mut combinations: Vec<Vec<T>>) -> Vec<Vec<T>> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `combinations` is never used
[INFO] [stdout]   --> tests/common.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn combinations<T: Clone>(vec: Vec<T>) -> Vec<Vec<T>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProofTestCases` is never constructed
[INFO] [stdout]   --> tests/common.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct ProofTestCases {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ProofTestCases` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MerkleProofTestCase` is never constructed
[INFO] [stdout]   --> tests/common.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct MerkleProofTestCase {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MerkleProofTestCase` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> tests/common.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | impl MerkleProofTestCase {
[INFO] [stdout]    | ------------------------ associated function in this implementation
[INFO] [stdout] 86 |     fn new(leaf_hashes_to_prove: Vec<[u8; 32]>, leaf_indices_to_prove: Vec<usize>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `setup_proof_test_cases` is never used
[INFO] [stdout]   --> tests/common.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 | pub fn setup_proof_test_cases() -> Vec<ProofTestCases> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "4057ab618f49feb008114fc26c39eb73b4bfa3f3afb65ed2744f40d3df1b6872", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4057ab618f49feb008114fc26c39eb73b4bfa3f3afb65ed2744f40d3df1b6872", kill_on_drop: false }`
[INFO] [stdout] 4057ab618f49feb008114fc26c39eb73b4bfa3f3afb65ed2744f40d3df1b6872
[INFO] checking rs_merkle-1.4.1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate rs_merkle 1.4.1 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate rs_merkle 1.4.1 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rs_merkle 1.4.1
[INFO] finished tweaking crates.io crate rs_merkle 1.4.1
[INFO] tweaked toml for crates.io crate rs_merkle 1.4.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f54376d7ecdfabd185d1d9fd12fcb8570c71d8c3bfc8ea953e05324b8dd8b0f8
[INFO] running `Command { std: "docker" "start" "-a" "f54376d7ecdfabd185d1d9fd12fcb8570c71d8c3bfc8ea953e05324b8dd8b0f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f54376d7ecdfabd185d1d9fd12fcb8570c71d8c3bfc8ea953e05324b8dd8b0f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f54376d7ecdfabd185d1d9fd12fcb8570c71d8c3bfc8ea953e05324b8dd8b0f8", kill_on_drop: false }`
[INFO] [stdout] f54376d7ecdfabd185d1d9fd12fcb8570c71d8c3bfc8ea953e05324b8dd8b0f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 482c288e4508557f128e1d5a4f672411e55da49f6fb6a00b0ee60ea3c493f57c
[INFO] running `Command { std: "docker" "start" "-a" "482c288e4508557f128e1d5a4f672411e55da49f6fb6a00b0ee60ea3c493f57c", kill_on_drop: false }`
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking rs_merkle v1.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/hasher.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::prelude::*;
[INFO] [stdout]   |     ----------------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/merkle_proof.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::prelude::*;
[INFO] [stdout]   |     ----------------- the item `TryFrom` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 8 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::borrow::ToOwned`
[INFO] [stdout]  --> src/prelude.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub use alloc::borrow::ToOwned;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/prelude.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use alloc::boxed::Box;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TryFrom`, `TryInto`
[INFO] [stdout]   --> src/prelude.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use core::convert::{TryFrom, TryInto};
[INFO] [stdout]    |                         ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::iter::FromIterator`
[INFO] [stdout]   --> src/prelude.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use core::iter::FromIterator;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/proof_serializers/direct_hashes_order.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{prelude::*, Error, Hasher, MerkleProof, MerkleProofSerializer};
[INFO] [stdout]   |             ---------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/proof_serializers/reverse_hashes_order.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{prelude::*, Error, Hasher, MerkleProof, MerkleProofSerializer};
[INFO] [stdout]   |             ---------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/hasher.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::prelude::*;
[INFO] [stdout]   |     ----------------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/merkle_proof.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::prelude::*;
[INFO] [stdout]   |     ----------------- the item `TryFrom` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 8 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/prelude.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use alloc::boxed::Box;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/proof_serializers/direct_hashes_order.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{prelude::*, Error, Hasher, MerkleProof, MerkleProofSerializer};
[INFO] [stdout]   |             ---------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/proof_serializers/reverse_hashes_order.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{prelude::*, Error, Hasher, MerkleProof, MerkleProofSerializer};
[INFO] [stdout]   |             ---------- the item `TryFrom` is already imported here
[INFO] [stdout] 2 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]   --> tests/merkle_tree_test.rs:70:41
[INFO] [stdout]    |
[INFO] [stdout] 70 |     use rs_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]    |                                         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::common`
[INFO] [stdout]    --> tests/merkle_tree_test.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |     use crate::common;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hasher`
[INFO] [stdout]  --> tests/merkle_proof_test.rs:6:48
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use rs_merkle::{algorithms::Sha256, Error, Hasher, MerkleTree};
[INFO] [stdout]   |                                                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::common`
[INFO] [stdout]    --> tests/merkle_proof_test.rs:139:9
[INFO] [stdout]     |
[INFO] [stdout] 139 |     use crate::common;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `leaf_values` is never read
[INFO] [stdout]  --> tests/common.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct TestData {
[INFO] [stdout]   |            -------- field in this struct
[INFO] [stdout] 8 |     pub leaf_values: Vec<String>,
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `leaf_values` is never read
[INFO] [stdout]   --> tests/common.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct TestData48 {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 14 |     pub leaf_values: Vec<String>,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `combine` is never used
[INFO] [stdout]   --> tests/common.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn combine<T: Clone>(active: Vec<T>, rest: Vec<T>, mut combinations: Vec<Vec<T>>) -> Vec<Vec<T>> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `combinations` is never used
[INFO] [stdout]   --> tests/common.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn combinations<T: Clone>(vec: Vec<T>) -> Vec<Vec<T>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProofTestCases` is never constructed
[INFO] [stdout]   --> tests/common.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct ProofTestCases {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ProofTestCases` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MerkleProofTestCase` is never constructed
[INFO] [stdout]   --> tests/common.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct MerkleProofTestCase {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MerkleProofTestCase` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> tests/common.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | impl MerkleProofTestCase {
[INFO] [stdout]    | ------------------------ associated function in this implementation
[INFO] [stdout] 86 |     fn new(leaf_hashes_to_prove: Vec<[u8; 32]>, leaf_indices_to_prove: Vec<usize>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `setup_proof_test_cases` is never used
[INFO] [stdout]   --> tests/common.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 | pub fn setup_proof_test_cases() -> Vec<ProofTestCases> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expected_root`
[INFO] [stdout]   --> tests/merkle_proof_test.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let expected_root = test_data.expected_root_hex.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expected_root`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TestData48` is never constructed
[INFO] [stdout]   --> tests/common.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct TestData48 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `setup_sha384` is never used
[INFO] [stdout]   --> tests/common.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn setup_sha384() -> TestData48 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "482c288e4508557f128e1d5a4f672411e55da49f6fb6a00b0ee60ea3c493f57c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "482c288e4508557f128e1d5a4f672411e55da49f6fb6a00b0ee60ea3c493f57c", kill_on_drop: false }`
[INFO] [stdout] 482c288e4508557f128e1d5a4f672411e55da49f6fb6a00b0ee60ea3c493f57c