[INFO] fetching crate merkle_trees 0.1.0...
[INFO] checking merkle_trees-0.1.0 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate merkle_trees 0.1.0 into /workspace/builds/worker-19/source
[INFO] validating manifest of crates.io crate merkle_trees 0.1.0 on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-19/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
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[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] aea04042fe9fc0161c44e1350c443e26f7dd56166190c0c9a4dbaca8066ed6b9
[INFO] running `Command { std: "docker" "start" "-a" "aea04042fe9fc0161c44e1350c443e26f7dd56166190c0c9a4dbaca8066ed6b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aea04042fe9fc0161c44e1350c443e26f7dd56166190c0c9a4dbaca8066ed6b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aea04042fe9fc0161c44e1350c443e26f7dd56166190c0c9a4dbaca8066ed6b9", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4a4fc5862b9e7a351afae1b2022cf678889382fd844ca604353d674e2be0382
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[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   byteorder v1.4.3: default, std
[INFO] [stderr]   memchr v2.4.1: default, std, use_std
[INFO] [stderr]   serde v1.0.128: derive, serde_derive
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[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling quote v1.0.9
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[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking mimc-rs v0.0.2
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling unqlite v1.5.0
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking sled v0.29.2
[INFO] [stderr]     Checking merkle_trees v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/types.rs (2 fixes)
[INFO] [stderr]        Fixed src/compact_merkle_tree.rs (2 fixes)
[INFO] [stderr]        Fixed src/db.rs (1 fix)
[INFO] [stderr]        Fixed src/merkle_patricia_trie.rs (2 fixes)
[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: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/merkle_patricia_trie.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_leaf`
[INFO] [stdout]   --> src/merkle_patricia_trie.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn is_leaf(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_extension`
[INFO] [stdout]   --> src/merkle_patricia_trie.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn is_extension(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset_root`
[INFO] [stdout]     --> src/merkle_patricia_trie.rs:1373:8
[INFO] [stdout]      |
[INFO] [stdout] 1373 |     fn reset_root(&mut self) {
[INFO] [stdout]      |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed src/compact_merkle_tree.rs (4 fixes)
[INFO] [stderr]        Fixed src/sparse_merkle_tree.rs (1 fix)
[INFO] [stderr]        Fixed src/hasher.rs (1 fix)
[INFO] [stderr]        Fixed src/vanilla_sparse_merkle_tree.rs (1 fix)
[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: unused import: `num_traits::Pow`
[INFO] [stdout]    --> src/sparse_merkle_tree.rs:404:9
[INFO] [stdout]     |
[INFO] [stdout] 404 |     use num_traits::Pow;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/merkle_patricia_trie.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset_root`
[INFO] [stdout]     --> src/merkle_patricia_trie.rs:1373:8
[INFO] [stdout]      |
[INFO] [stdout] 1373 |     fn reset_root(&mut self) {
[INFO] [stdout]      |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.18s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking sled v0.29.2
[INFO] [stderr]     Checking object v0.26.1
[INFO] [stderr]     Checking backtrace v0.3.61
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking merkle_trees v0.1.0 (/tmp/fixit)
[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: 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: unused import: `num_traits::Pow`
[INFO] [stdout]    --> src/sparse_merkle_tree.rs:404:9
[INFO] [stdout]     |
[INFO] [stdout] 404 |     use num_traits::Pow;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/merkle_patricia_trie.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_leaf`
[INFO] [stdout]   --> src/merkle_patricia_trie.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn is_leaf(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_extension`
[INFO] [stdout]   --> src/merkle_patricia_trie.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn is_extension(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset_root`
[INFO] [stdout]     --> src/merkle_patricia_trie.rs:1373:8
[INFO] [stdout]      |
[INFO] [stdout] 1373 |     fn reset_root(&mut self) {
[INFO] [stdout]      |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/merkle_patricia_trie.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset_root`
[INFO] [stdout]     --> src/merkle_patricia_trie.rs:1373:8
[INFO] [stdout]      |
[INFO] [stdout] 1373 |     fn reset_root(&mut self) {
[INFO] [stdout]      |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.13s
[INFO] running `Command { std: "docker" "inspect" "d4a4fc5862b9e7a351afae1b2022cf678889382fd844ca604353d674e2be0382", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4a4fc5862b9e7a351afae1b2022cf678889382fd844ca604353d674e2be0382", kill_on_drop: false }`
[INFO] [stdout] d4a4fc5862b9e7a351afae1b2022cf678889382fd844ca604353d674e2be0382