[INFO] fetching crate id_tree 1.8.0...
[INFO] checking id_tree-1.8.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate id_tree 1.8.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate id_tree 1.8.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate id_tree 1.8.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate id_tree 1.8.0
[INFO] tweaked toml for crates.io crate id_tree 1.8.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate id_tree 1.8.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20a49892eb2ffb10a0c1e0c0f8decd2cc50e3ce32a9db34d8e10bb614e92558b
[INFO] running `Command { std: "docker" "start" "-a" "20a49892eb2ffb10a0c1e0c0f8decd2cc50e3ce32a9db34d8e10bb614e92558b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20a49892eb2ffb10a0c1e0c0f8decd2cc50e3ce32a9db34d8e10bb614e92558b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20a49892eb2ffb10a0c1e0c0f8decd2cc50e3ce32a9db34d8e10bb614e92558b", kill_on_drop: false }`
[INFO] [stdout] 20a49892eb2ffb10a0c1e0c0f8decd2cc50e3ce32a9db34d8e10bb614e92558b
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 226490d4a678618f3f2f34f6710951873111060b919196ea57ecc3272ce96840
[INFO] running `Command { std: "docker" "start" "-a" "226490d4a678618f3f2f34f6710951873111060b919196ea57ecc3272ce96840", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking id_tree v1.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/iterators.rs:181:79
[INFO] [stdout]     |
[INFO] [stdout] 180 | impl<'a, T> PreOrderTraversal<'a, T> {
[INFO] [stdout]     |      -- lifetime `'a` declared here
[INFO] [stdout] 181 |     pub(crate) fn new(tree: &'a Tree<T>, node_id: NodeId) -> PreOrderTraversal<T> {
[INFO] [stdout]     |                                                                               ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/iterators.rs:284:80
[INFO] [stdout]     |
[INFO] [stdout] 283 | impl<'a, T> PostOrderTraversal<'a, T> {
[INFO] [stdout]     |      -- lifetime `'a` declared here
[INFO] [stdout] 284 |     pub(crate) fn new(tree: &'a Tree<T>, node_id: NodeId) -> PostOrderTraversal<T> {
[INFO] [stdout]     |                                                                                ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/iterators.rs:380:81
[INFO] [stdout]     |
[INFO] [stdout] 379 | impl<'a, T> LevelOrderTraversal<'a, T> {
[INFO] [stdout]     |      -- lifetime `'a` declared here
[INFO] [stdout] 380 |     pub(crate) fn new(tree: &'a Tree<T>, node_id: NodeId) -> LevelOrderTraversal<T> {
[INFO] [stdout]     |                                                                                 ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/iterators.rs:431:84
[INFO] [stdout]     |
[INFO] [stdout] 430 | impl<'a, T> LevelOrderTraversalIds<'a, T> {
[INFO] [stdout]     |      -- lifetime `'a` declared here
[INFO] [stdout] 431 |     pub(crate) fn new(tree: &'a Tree<T>, node_id: NodeId) -> LevelOrderTraversalIds<T> {
[INFO] [stdout]     |                                                                                    ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/iterators.rs:181:79
[INFO] [stdout]     |
[INFO] [stdout] 180 | impl<'a, T> PreOrderTraversal<'a, T> {
[INFO] [stdout]     |      -- lifetime `'a` declared here
[INFO] [stdout] 181 |     pub(crate) fn new(tree: &'a Tree<T>, node_id: NodeId) -> PreOrderTraversal<T> {
[INFO] [stdout]     |                                                                               ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/iterators.rs:284:80
[INFO] [stdout]     |
[INFO] [stdout] 283 | impl<'a, T> PostOrderTraversal<'a, T> {
[INFO] [stdout]     |      -- lifetime `'a` declared here
[INFO] [stdout] 284 |     pub(crate) fn new(tree: &'a Tree<T>, node_id: NodeId) -> PostOrderTraversal<T> {
[INFO] [stdout]     |                                                                                ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/iterators.rs:380:81
[INFO] [stdout]     |
[INFO] [stdout] 379 | impl<'a, T> LevelOrderTraversal<'a, T> {
[INFO] [stdout]     |      -- lifetime `'a` declared here
[INFO] [stdout] 380 |     pub(crate) fn new(tree: &'a Tree<T>, node_id: NodeId) -> LevelOrderTraversal<T> {
[INFO] [stdout]     |                                                                                 ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/iterators.rs:431:84
[INFO] [stdout]     |
[INFO] [stdout] 430 | impl<'a, T> LevelOrderTraversalIds<'a, T> {
[INFO] [stdout]     |      -- lifetime `'a` declared here
[INFO] [stdout] 431 |     pub(crate) fn new(tree: &'a Tree<T>, node_id: NodeId) -> LevelOrderTraversalIds<T> {
[INFO] [stdout]     |                                                                                    ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "226490d4a678618f3f2f34f6710951873111060b919196ea57ecc3272ce96840", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "226490d4a678618f3f2f34f6710951873111060b919196ea57ecc3272ce96840", kill_on_drop: false }`
[INFO] [stdout] 226490d4a678618f3f2f34f6710951873111060b919196ea57ecc3272ce96840