[INFO] fetching crate tracing-logstash 0.7.0...
[INFO] checking tracing-logstash-0.7.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate tracing-logstash 0.7.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate tracing-logstash 0.7.0 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 tracing-logstash 0.7.0
[INFO] finished tweaking crates.io crate tracing-logstash 0.7.0
[INFO] tweaked toml for crates.io crate tracing-logstash 0.7.0 written to /workspace/builds/worker-2-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 26 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] ac1e68f38f780307c69c8b62ec0963a28f1629bdb2c2b5e94a9340bea1d0babb
[INFO] running `Command { std: "docker" "start" "-a" "ac1e68f38f780307c69c8b62ec0963a28f1629bdb2c2b5e94a9340bea1d0babb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac1e68f38f780307c69c8b62ec0963a28f1629bdb2c2b5e94a9340bea1d0babb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac1e68f38f780307c69c8b62ec0963a28f1629bdb2c2b5e94a9340bea1d0babb", kill_on_drop: false }`
[INFO] [stdout] ac1e68f38f780307c69c8b62ec0963a28f1629bdb2c2b5e94a9340bea1d0babb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 007eea40e0bc50c4c7609a9be9b418cf2ea8d21edfc4c7a986899a60862c6f94
[INFO] running `Command { std: "docker" "start" "-a" "007eea40e0bc50c4c7609a9be9b418cf2ea8d21edfc4c7a986899a60862c6f94", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking serde v1.0.210
[INFO] [stderr]     Checking serde_json v1.0.128
[INFO] [stderr]     Checking tracing-logstash v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this value of type `Result<std::string::String, time::error::Format>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/logstash.rs:465:15
[INFO] [stdout]     |
[INFO] [stdout] 461 |       fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
[INFO] [stdout]     |                              ---------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 465 |           match self
[INFO] [stdout]     |  _______________^
[INFO] [stdout] 466 | |             .0
[INFO] [stdout] 467 | |             .format(&time::format_description::well_known::Rfc3339)
[INFO] [stdout]     | |___________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `record_event` is never used
[INFO] [stdout]  --> src/event_recorder.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait EventRecorder {
[INFO] [stdout]   |           ------------- method in this trait
[INFO] [stdout] 7 |     fn record_event(&mut self, event: &Event<'_>);
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tracing-logstash` (lib) due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this value of type `Result<std::string::String, time::error::Format>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/logstash.rs:465:15
[INFO] [stdout]     |
[INFO] [stdout] 461 |       fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
[INFO] [stdout]     |                              ---------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 465 |           match self
[INFO] [stdout]     |  _______________^
[INFO] [stdout] 466 | |             .0
[INFO] [stdout] 467 | |             .format(&time::format_description::well_known::Rfc3339)
[INFO] [stdout]     | |___________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `record_event` is never used
[INFO] [stdout]  --> src/event_recorder.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait EventRecorder {
[INFO] [stdout]   |           ------------- method in this trait
[INFO] [stdout] 7 |     fn record_event(&mut self, event: &Event<'_>);
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tracing-logstash` (lib test) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "007eea40e0bc50c4c7609a9be9b418cf2ea8d21edfc4c7a986899a60862c6f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "007eea40e0bc50c4c7609a9be9b418cf2ea8d21edfc4c7a986899a60862c6f94", kill_on_drop: false }`
[INFO] [stdout] 007eea40e0bc50c4c7609a9be9b418cf2ea8d21edfc4c7a986899a60862c6f94