[INFO] fetching crate instrumented-mpsc 0.1.0... [INFO] checking instrumented-mpsc-0.1.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864 [INFO] extracting crate instrumented-mpsc 0.1.0 into /workspace/builds/worker-2-tc2/source [INFO] validating manifest of crates.io crate instrumented-mpsc 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 instrumented-mpsc 0.1.0 [INFO] finished tweaking crates.io crate instrumented-mpsc 0.1.0 [INFO] tweaked toml for crates.io crate instrumented-mpsc 0.1.0 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 25 packages to latest compatible versions [INFO] [stderr] Adding cfg-if v0.1.10 (available: v1.0.0) [INFO] [stderr] Adding prometheus v0.7.0 (available: v0.13.4) [INFO] [stderr] Adding protobuf v2.28.0 (available: v3.5.1) [INFO] [stderr] Adding quick-error v1.2.3 (available: v2.0.1) [INFO] [stderr] Adding spin v0.5.2 (available: v0.9.8) [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] 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] 1822a6b35715aa82b1b0f840e3c6df2c33b34bba33ffb241e37afe26f2d5684d [INFO] running `Command { std: "docker" "start" "-a" "1822a6b35715aa82b1b0f840e3c6df2c33b34bba33ffb241e37afe26f2d5684d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1822a6b35715aa82b1b0f840e3c6df2c33b34bba33ffb241e37afe26f2d5684d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1822a6b35715aa82b1b0f840e3c6df2c33b34bba33ffb241e37afe26f2d5684d", kill_on_drop: false }` [INFO] [stdout] 1822a6b35715aa82b1b0f840e3c6df2c33b34bba33ffb241e37afe26f2d5684d [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] 2f52ab5f5a5272b07440f3af8eb781da31addb8d59306b3adf5d6704468144fb [INFO] running `Command { std: "docker" "start" "-a" "2f52ab5f5a5272b07440f3af8eb781da31addb8d59306b3adf5d6704468144fb", kill_on_drop: false }` [INFO] [stderr] Compiling prometheus v0.7.0 [INFO] [stderr] Checking quick-error v1.2.3 [INFO] [stderr] Compiling syn v2.0.77 [INFO] [stderr] Compiling futures-macro v0.3.30 [INFO] [stderr] Checking futures-util v0.3.30 [INFO] [stderr] Checking futures-executor v0.3.30 [INFO] [stderr] Checking futures v0.3.30 [INFO] [stderr] Checking instrumented-mpsc v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error: this value of type `std::vec::IntoIter` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/lib.rs:209:23 [INFO] [stdout] | [INFO] [stdout] 195 | let registry = Registry::new(); [INFO] [stdout] | -------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 198 | let (tx, mut rx) = unbounded(); [INFO] [stdout] | -- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 209 | for metric in registry.gather() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `instrumented-mpsc` (lib test) due to 2 previous errors [INFO] running `Command { std: "docker" "inspect" "2f52ab5f5a5272b07440f3af8eb781da31addb8d59306b3adf5d6704468144fb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2f52ab5f5a5272b07440f3af8eb781da31addb8d59306b3adf5d6704468144fb", kill_on_drop: false }` [INFO] [stdout] 2f52ab5f5a5272b07440f3af8eb781da31addb8d59306b3adf5d6704468144fb