[INFO] fetching crate basic_tree 0.2.5...
[INFO] checking basic_tree-0.2.5 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate basic_tree 0.2.5 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate basic_tree 0.2.5
[INFO] finished tweaking crates.io crate basic_tree 0.2.5
[INFO] tweaked toml for crates.io crate basic_tree 0.2.5 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate basic_tree 0.2.5 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c333f4aba9da91e0d22acd8284f42f8a3ba1e3dc6d0032527527f61253da1bf9
[INFO] running `Command { std: "docker" "start" "-a" "c333f4aba9da91e0d22acd8284f42f8a3ba1e3dc6d0032527527f61253da1bf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c333f4aba9da91e0d22acd8284f42f8a3ba1e3dc6d0032527527f61253da1bf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c333f4aba9da91e0d22acd8284f42f8a3ba1e3dc6d0032527527f61253da1bf9", kill_on_drop: false }`
[INFO] [stdout] c333f4aba9da91e0d22acd8284f42f8a3ba1e3dc6d0032527527f61253da1bf9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c59a65d9dfa1367f19c70cb088fd921c47486c6ca9574c131b61ddbb2443d3c
[INFO] running `Command { std: "docker" "start" "-a" "4c59a65d9dfa1367f19c70cb088fd921c47486c6ca9574c131b61ddbb2443d3c", kill_on_drop: false }`
[INFO] [stderr]     Checking basic_tree v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::cmp::Eq`
[INFO] [stdout]  --> src/trie/word.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::Eq;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/trie/word.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Eq`
[INFO] [stdout]  --> src/trie/word.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::Eq;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/trie/word.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_leaf` is never used
[INFO] [stdout]   --> src/trie/word.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl WordTrie {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn get_leaf(&self, words: &[String]) -> Leaf<String> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inner` is never read
[INFO] [stdout]   --> src/trie/word.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct WordTrie {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 25 |     inner: Rc<RefCell<Node<String>>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `WordTrie` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert_words`, `split_words`, `insert`, and `get_leaf` are never used
[INFO] [stdout]   --> src/trie/word.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl WordTrie {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 29 |     fn new() -> WordTrie {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     fn insert_words(&self, words: &str, target: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn split_words(words: &str) -> Vec<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn insert(&self, words: &[String], target: String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn get_leaf(&self, words: &[String]) -> Leaf<String> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "4c59a65d9dfa1367f19c70cb088fd921c47486c6ca9574c131b61ddbb2443d3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c59a65d9dfa1367f19c70cb088fd921c47486c6ca9574c131b61ddbb2443d3c", kill_on_drop: false }`
[INFO] [stdout] 4c59a65d9dfa1367f19c70cb088fd921c47486c6ca9574c131b61ddbb2443d3c