[INFO] fetching crate rtrees 0.1.0...
[INFO] checking rtrees-0.1.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate rtrees 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate rtrees 0.1.0 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 rtrees 0.1.0
[INFO] finished tweaking crates.io crate rtrees 0.1.0
[INFO] tweaked toml for crates.io crate rtrees 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 10 packages to latest compatible versions
[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] 6d9022ada2346b28c743a66cc2d4e8030da3d12030c1f5f7652dd02bf4f0bfca
[INFO] running `Command { std: "docker" "start" "-a" "6d9022ada2346b28c743a66cc2d4e8030da3d12030c1f5f7652dd02bf4f0bfca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d9022ada2346b28c743a66cc2d4e8030da3d12030c1f5f7652dd02bf4f0bfca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d9022ada2346b28c743a66cc2d4e8030da3d12030c1f5f7652dd02bf4f0bfca", kill_on_drop: false }`
[INFO] [stdout] 6d9022ada2346b28c743a66cc2d4e8030da3d12030c1f5f7652dd02bf4f0bfca
[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] cdcacab81116618de54330404bede4e64eeedbdb1755ab153aba7d811e769e07
[INFO] running `Command { std: "docker" "start" "-a" "cdcacab81116618de54330404bede4e64eeedbdb1755ab153aba7d811e769e07", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking rtrees v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_json v1.0.128
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/ist/iter_ref.rs:31:61
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl<'a, K: Ord + Copy, V> ISTRefIterator<'a, K, V> {
[INFO] [stdout]    |      -- lifetime `'a` declared here
[INFO] [stdout] 31 |     pub(crate) fn new(root: &'a IST<K, V>) -> ISTRefIterator<K, V> {
[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: struct `Interval2` is never constructed
[INFO] [stdout]   --> src/ist/interval.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Interval2<T: Ord + Copy> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Interval2` has a derived impl for the trait `Clone`, 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/ist/iter_ref.rs:31:61
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl<'a, K: Ord + Copy, V> ISTRefIterator<'a, K, V> {
[INFO] [stdout]    |      -- lifetime `'a` declared here
[INFO] [stdout] 31 |     pub(crate) fn new(root: &'a IST<K, V>) -> ISTRefIterator<K, V> {
[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: struct `Interval2` is never constructed
[INFO] [stdout]   --> src/ist/interval.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Interval2<T: Ord + Copy> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Interval2` has a derived impl for the trait `Clone`, 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "cdcacab81116618de54330404bede4e64eeedbdb1755ab153aba7d811e769e07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdcacab81116618de54330404bede4e64eeedbdb1755ab153aba7d811e769e07", kill_on_drop: false }`
[INFO] [stdout] cdcacab81116618de54330404bede4e64eeedbdb1755ab153aba7d811e769e07