[INFO] fetching crate merkle_trees 0.1.0... [INFO] checking merkle_trees-0.1.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930 [INFO] extracting crate merkle_trees 0.1.0 into /workspace/builds/worker-3-tc2/source [INFO] validating manifest of crates.io crate merkle_trees 0.1.0 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate merkle_trees 0.1.0 [INFO] finished tweaking crates.io crate merkle_trees 0.1.0 [INFO] tweaked toml for crates.io crate merkle_trees 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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 143 packages to latest compatible versions [INFO] [stderr] Adding arrayvec v0.4.12 (available: v0.7.6) [INFO] [stderr] Adding arrayvec v0.5.2 (available: v0.7.6) [INFO] [stderr] Adding autocfg v0.1.8 (available: v1.4.0) [INFO] [stderr] Adding bindgen v0.55.1 (available: v0.70.1) [INFO] [stderr] Adding bitflags v1.3.2 (available: v2.6.0) [INFO] [stderr] Adding blake2 v0.8.1 (available: v0.10.6) [INFO] [stderr] Adding block-buffer v0.7.3 (available: v0.10.4) [INFO] [stderr] Adding block-padding v0.1.5 (available: v0.3.3) [INFO] [stderr] Adding cexpr v0.4.0 (available: v0.6.0) [INFO] [stderr] Adding cfg-if v0.1.10 (available: v1.0.0) [INFO] [stderr] Adding clap v2.34.0 (available: v4.5.18) [INFO] [stderr] Adding cloudabi v0.0.3 (available: v0.1.0) [INFO] [stderr] Adding crossbeam-channel v0.3.9 (available: v0.5.13) [INFO] [stderr] Adding crossbeam-epoch v0.7.2 (available: v0.9.18) [INFO] [stderr] Adding crossbeam-utils v0.6.6 (available: v0.8.20) [INFO] [stderr] Adding crypto-mac v0.7.0 (available: v0.11.1) [INFO] [stderr] Adding digest v0.8.1 (available: v0.10.7) [INFO] [stderr] Adding env_logger v0.7.1 (available: v0.11.5) [INFO] [stderr] Adding generic-array v0.12.4 (available: v1.1.0) [INFO] [stderr] Adding generic-array v0.13.3 (available: v1.1.0) [INFO] [stderr] Adding hermit-abi v0.1.19 (available: v0.4.0) [INFO] [stderr] Adding humantime v1.3.0 (available: v2.1.0) [INFO] [stderr] Adding lock_api v0.3.4 (available: v0.4.12) [INFO] [stderr] Adding memoffset v0.5.6 (available: v0.9.1) [INFO] [stderr] Adding nom v5.1.3 (available: v7.1.3) [INFO] [stderr] Adding num v0.2.1 (available: v0.4.3) [INFO] [stderr] Adding num-bigint v0.2.6 (available: v0.4.6) [INFO] [stderr] Adding num-complex v0.2.4 (available: v0.4.6) [INFO] [stderr] Adding num-rational v0.2.4 (available: v0.4.2) [INFO] [stderr] Adding opaque-debug v0.2.3 (available: v0.3.1) [INFO] [stderr] Adding parking_lot v0.9.0 (available: v0.12.3) [INFO] [stderr] Adding parking_lot_core v0.6.3 (available: v0.9.10) [INFO] [stderr] Adding peeking_take_while v0.1.2 (available: v1.0.0) [INFO] [stderr] Adding quick-error v1.2.3 (available: v2.0.1) [INFO] [stderr] Adding rand v0.5.6 (available: v0.8.5) [INFO] [stderr] Adding rand v0.6.5 (available: v0.8.5) [INFO] [stderr] Adding rand_chacha v0.1.1 (available: v0.3.1) [INFO] [stderr] Adding rand_core v0.3.1 (available: v0.6.4) [INFO] [stderr] Adding rand_core v0.4.2 (available: v0.6.4) [INFO] [stderr] Adding rand_hc v0.1.0 (available: v0.3.2) [INFO] [stderr] Adding rand_isaac v0.1.1 (available: v0.3.0) [INFO] [stderr] Adding rand_jitter v0.1.4 (available: v0.4.0) [INFO] [stderr] Adding rand_os v0.1.3 (available: v0.2.2) [INFO] [stderr] Adding rand_pcg v0.1.2 (available: v0.3.1) [INFO] [stderr] Adding rand_xorshift v0.1.1 (available: v0.3.0) [INFO] [stderr] Adding rdrand v0.4.0 (available: v0.8.3) [INFO] [stderr] Adding redox_syscall v0.1.57 (available: v0.5.6) [INFO] [stderr] Adding rlp v0.4.6 (available: v0.6.1) [INFO] [stderr] Adding rustc-hash v1.1.0 (available: v2.0.0) [INFO] [stderr] Adding rustc-hex v1.0.0 (available: v2.1.0) [INFO] [stderr] Adding rustc_version v0.2.3 (available: v0.4.1) [INFO] [stderr] Adding semver v0.9.0 (available: v1.0.23) [INFO] [stderr] Adding semver-parser v0.7.0 (available: v0.10.2) [INFO] [stderr] Adding sha2 v0.8.2 (available: v0.10.8) [INFO] [stderr] Adding sha3 v0.8.2 (available: v0.10.8) [INFO] [stderr] Adding shlex v0.1.1 (available: v1.3.0) [INFO] [stderr] Adding sled v0.29.2 (available: v0.34.7) [INFO] [stderr] Adding smallvec v0.6.14 (available: v1.13.2) [INFO] [stderr] Adding strsim v0.8.0 (available: v0.11.1) [INFO] [stderr] Adding subtle v1.0.0 (available: v2.6.1) [INFO] [stderr] Adding syn v1.0.109 (available: v2.0.79) [INFO] [stderr] Adding synstructure v0.12.6 (available: v0.13.1) [INFO] [stderr] Adding textwrap v0.11.0 (available: v0.16.1) [INFO] [stderr] Adding tiny-keccak v1.5.0 (available: v2.0.2) [INFO] [stderr] Adding unicode-width v0.1.14 (available: v0.2.0) [INFO] [stderr] Adding which v3.1.1 (available: v6.0.3) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2dcffb21454a4d10f1fe0781a65f662fdcbb86fff033b090c7bfee2be04cf501 [INFO] running `Command { std: "docker" "start" "-a" "2dcffb21454a4d10f1fe0781a65f662fdcbb86fff033b090c7bfee2be04cf501", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2dcffb21454a4d10f1fe0781a65f662fdcbb86fff033b090c7bfee2be04cf501", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2dcffb21454a4d10f1fe0781a65f662fdcbb86fff033b090c7bfee2be04cf501", kill_on_drop: false }` [INFO] [stdout] 2dcffb21454a4d10f1fe0781a65f662fdcbb86fff033b090c7bfee2be04cf501 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f26af0ccf4bf12088e8de2785174c712e437ed55dcd8c02758f0807b4df47bf8 [INFO] running `Command { std: "docker" "start" "-a" "f26af0ccf4bf12088e8de2785174c712e437ed55dcd8c02758f0807b4df47bf8", kill_on_drop: false }` [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling memchr v2.7.4 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling regex-syntax v0.8.4 [INFO] [stderr] Compiling num-bigint v0.2.6 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Compiling clang-sys v1.8.1 [INFO] [stderr] Compiling nom v5.1.3 [INFO] [stderr] Compiling quick-error v1.2.3 [INFO] [stderr] Compiling unicode-width v0.1.14 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling libloading v0.8.5 [INFO] [stderr] Compiling syn v2.0.79 [INFO] [stderr] Compiling strsim v0.8.0 [INFO] [stderr] Compiling vec_map v0.8.2 [INFO] [stderr] Checking rand v0.5.6 [INFO] [stderr] Compiling humantime v1.3.0 [INFO] [stderr] Compiling bindgen v0.55.1 [INFO] [stderr] Compiling termcolor v1.4.1 [INFO] [stderr] Compiling ansi_term v0.12.1 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling textwrap v0.11.0 [INFO] [stderr] Compiling bitflags v1.3.2 [INFO] [stderr] Compiling log v0.4.22 [INFO] [stderr] Compiling which v3.1.1 [INFO] [stderr] Compiling num-complex v0.2.4 [INFO] [stderr] Compiling num-rational v0.2.4 [INFO] [stderr] Compiling shlex v0.1.1 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling peeking_take_while v0.1.2 [INFO] [stderr] Compiling arrayvec v0.4.12 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling clap v2.34.0 [INFO] [stderr] Compiling lazy_static v1.5.0 [INFO] [stderr] Checking crossbeam-utils v0.6.6 [INFO] [stderr] Checking object v0.36.4 [INFO] [stderr] Checking block-buffer v0.7.3 [INFO] [stderr] Checking nodrop v0.1.14 [INFO] [stderr] Checking rustc-hex v2.1.0 [INFO] [stderr] Checking crypto-mac v0.7.0 [INFO] [stderr] Checking tiny-keccak v1.5.0 [INFO] [stderr] Checking rand_chacha v0.1.1 [INFO] [stderr] Checking sha3 v0.8.2 [INFO] [stderr] Compiling aho-corasick v1.1.3 [INFO] [stderr] Checking rlp v0.4.6 [INFO] [stderr] Compiling parking_lot_core v0.6.3 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Checking crossbeam-channel v0.3.9 [INFO] [stderr] Checking sha2 v0.8.2 [INFO] [stderr] Checking rand_hc v0.1.0 [INFO] [stderr] Checking num-integer v0.1.46 [INFO] [stderr] Checking rand_isaac v0.1.1 [INFO] [stderr] Checking crossbeam-epoch v0.7.2 [INFO] [stderr] Checking rand_xorshift v0.1.1 [INFO] [stderr] Checking crc32fast v1.4.2 [INFO] [stderr] Checking generic-array v0.13.3 [INFO] [stderr] Checking fs2 v0.4.3 [INFO] [stderr] Checking arrayvec v0.5.2 [INFO] [stderr] Checking num-iter v0.1.45 [INFO] [stderr] Checking rustc-hex v1.0.0 [INFO] [stderr] Checking rand v0.6.5 [INFO] [stderr] Checking blake2 v0.8.1 [INFO] [stderr] Checking num v0.2.1 [INFO] [stderr] Checking mimc-rs v0.0.2 [INFO] [stderr] Compiling regex-automata v0.4.7 [INFO] [stderr] Compiling serde_derive v1.0.210 [INFO] [stderr] Compiling cexpr v0.4.0 [INFO] [stderr] Checking backtrace v0.3.74 [INFO] [stderr] Checking failure v0.1.8 [INFO] [stderr] Checking serde v1.0.210 [INFO] [stderr] Compiling regex v1.10.6 [INFO] [stderr] Compiling env_logger v0.7.1 [INFO] [stderr] Checking serde_json v1.0.128 [INFO] [stderr] Checking serde_bytes v0.11.15 [INFO] [stderr] Checking bincode v1.3.3 [INFO] [stderr] Checking sled v0.29.2 [INFO] [stderr] Checking merkle_trees v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused `#[macro_use]` import [INFO] [stdout] --> src/lib.rs:13:1 [INFO] [stdout] | [INFO] [stdout] 13 | #[macro_use] [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around assigned value [INFO] [stdout] --> src/compact_merkle_tree.rs:284:28 [INFO] [stdout] | [INFO] [stdout] 284 | idx += (p - 1); [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 284 - idx += (p - 1); [INFO] [stdout] 284 + idx += p - 1; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around assigned value [INFO] [stdout] --> src/compact_merkle_tree.rs:834:29 [INFO] [stdout] | [INFO] [stdout] 834 | let last_leaf_idx = (size - 1); [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 834 - let last_leaf_idx = (size - 1); [INFO] [stdout] 834 + let last_leaf_idx = size - 1; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::iter::FromIterator` [INFO] [stdout] --> src/db.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::iter::FromIterator; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::hasher::Arity2Hasher` [INFO] [stdout] --> src/merkle_patricia_trie.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | use crate::hasher::Arity2Hasher; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::types::LeafIndex` [INFO] [stdout] --> src/merkle_patricia_trie.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | use crate::types::LeafIndex; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `arrayvec::ArrayVec` [INFO] [stdout] --> src/types.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use arrayvec::ArrayVec; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `num_traits::identities::Zero` [INFO] [stdout] --> src/types.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use num_traits::identities::Zero; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this value of type `Result` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/merkle_patricia_trie.rs:586:15 [INFO] [stdout] | [INFO] [stdout] 579 | let new_trie = Self::initialize_with_given_nodes_and_root_hash( [INFO] [stdout] | -------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 586 | match new_trie.get(key, &mut None, hash_db) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `is_empty`, `is_leaf`, and `is_extension` are never used [INFO] [stdout] --> src/merkle_patricia_trie.rs:35:8 [INFO] [stdout] | [INFO] [stdout] 34 | impl NodeType { [INFO] [stdout] | ------------------------- methods in this implementation [INFO] [stdout] 35 | fn is_empty(&self) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 42 | fn is_leaf(&self) -> bool { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 49 | fn is_extension(&self) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `reset_root` is never used [INFO] [stdout] --> src/merkle_patricia_trie.rs:1373:8 [INFO] [stdout] | [INFO] [stdout] 479 | / impl [INFO] [stdout] 480 | | MerklePatriciaTrie [INFO] [stdout] 481 | | where [INFO] [stdout] 482 | | NS: PatriciaTrieNodeSerializer, [INFO] [stdout] 483 | | NH: NodeHasher, [INFO] [stdout] | |_________________________- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 1373 | fn reset_root(&mut self) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item [INFO] [stdout] --> src/errors.rs:4:39 [INFO] [stdout] | [INFO] [stdout] 4 | #[derive(Clone, Eq, PartialEq, Debug, Fail)] [INFO] [stdout] | ^--- [INFO] [stdout] | | [INFO] [stdout] | `Fail` is not local [INFO] [stdout] | move the `impl` block outside of this constant `_DERIVE_failure_Fail_FOR_MerkleTreeErrorKind` [INFO] [stdout] 5 | pub enum MerkleTreeErrorKind { [INFO] [stdout] | ------------------- `MerkleTreeErrorKind` is not local [INFO] [stdout] | [INFO] [stdout] = note: the derive macro `Fail` defines the non-local `impl`, and may need to be changed [INFO] [stdout] = note: the derive macro `Fail` may come from an old version of the `failure_derive` crate, try updating your dependency with `cargo update -p failure_derive` [INFO] [stdout] = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl` [INFO] [stdout] = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint [INFO] [stdout] = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue [INFO] [stdout] = note: `#[warn(non_local_definitions)]` on by default [INFO] [stdout] = note: this warning originates in the derive macro `Fail` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item [INFO] [stdout] --> src/errors.rs:4:39 [INFO] [stdout] | [INFO] [stdout] 4 | #[derive(Clone, Eq, PartialEq, Debug, Fail)] [INFO] [stdout] | ^--- [INFO] [stdout] | | [INFO] [stdout] | `Display` is not local [INFO] [stdout] | move the `impl` block outside of this constant `_DERIVE_failure_core_fmt_Display_FOR_MerkleTreeErrorKind` [INFO] [stdout] 5 | pub enum MerkleTreeErrorKind { [INFO] [stdout] | ------------------- `MerkleTreeErrorKind` is not local [INFO] [stdout] | [INFO] [stdout] = note: the derive macro `Fail` defines the non-local `impl`, and may need to be changed [INFO] [stdout] = note: the derive macro `Fail` may come from an old version of the `failure_derive` crate, try updating your dependency with `cargo update -p failure_derive` [INFO] [stdout] = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl` [INFO] [stdout] = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint [INFO] [stdout] = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue [INFO] [stdout] = note: this warning originates in the derive macro `Fail` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 12 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `merkle_trees` (lib) due to 2 previous errors; 12 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "f26af0ccf4bf12088e8de2785174c712e437ed55dcd8c02758f0807b4df47bf8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f26af0ccf4bf12088e8de2785174c712e437ed55dcd8c02758f0807b4df47bf8", kill_on_drop: false }` [INFO] [stdout] f26af0ccf4bf12088e8de2785174c712e437ed55dcd8c02758f0807b4df47bf8