[INFO] fetching crate iou 0.3.3... [INFO] checking iou-0.3.3 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864 [INFO] extracting crate iou 0.3.3 into /workspace/builds/worker-4-tc2/source [INFO] validating manifest of crates.io crate iou 0.3.3 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 iou 0.3.3 [INFO] finished tweaking crates.io crate iou 0.3.3 [INFO] tweaked toml for crates.io crate iou 0.3.3 written to /workspace/builds/worker-4-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 9 packages to latest compatible versions [INFO] [stderr] Adding bitflags v1.3.2 (available: v2.6.0) [INFO] [stderr] Adding cfg-if v0.1.10 (available: v1.0.0) [INFO] [stderr] Adding nix v0.18.0 (available: v0.29.0) [INFO] [stderr] Adding semver v0.9.0 (available: v1.0.23) [INFO] [stderr] Adding semver-parser v0.7.0 (available: v0.10.2) [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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] dedd7fd7afe8e324b7d66f8929b9a195ce112c6da2b5af2b96473bd4648700f8 [INFO] running `Command { std: "docker" "start" "-a" "dedd7fd7afe8e324b7d66f8929b9a195ce112c6da2b5af2b96473bd4648700f8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "dedd7fd7afe8e324b7d66f8929b9a195ce112c6da2b5af2b96473bd4648700f8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dedd7fd7afe8e324b7d66f8929b9a195ce112c6da2b5af2b96473bd4648700f8", kill_on_drop: false }` [INFO] [stdout] dedd7fd7afe8e324b7d66f8929b9a195ce112c6da2b5af2b96473bd4648700f8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 86ce802425afeb7151ef3446693c0051c38dda0f29ce004cc9562ba8036b5d1f [INFO] running `Command { std: "docker" "start" "-a" "86ce802425afeb7151ef3446693c0051c38dda0f29ce004cc9562ba8036b5d1f", kill_on_drop: false }` [INFO] [stderr] Compiling nix v0.18.0 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Checking semver-parser v0.7.0 [INFO] [stderr] Compiling uring-sys v0.7.4 [INFO] [stderr] Checking semver v0.9.0 [INFO] [stderr] Checking iou v0.3.3 (/opt/rustwide/workdir) [INFO] [stdout] error: this value of type `std::io::Error` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> tests/poll.rs:52:21 [INFO] [stdout] | [INFO] [stdout] 32 | let mut ring = iou::IoUring::new(2)?; [INFO] [stdout] | -------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] 33 | let (read, _write) = net::UnixStream::pair()?; [INFO] [stdout] | ---- ------ these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] | | [INFO] [stdout] | these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 52 | let err = cqe [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 `iou` (test "poll") due to 2 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> tests/write.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | drop(bufs); // hold bufs until after io completes [INFO] [stdout] | ^^^^^----^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `[IoSlice<'_>; 1]` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_copy_types)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 43 - drop(bufs); // hold bufs until after io completes [INFO] [stdout] 43 + let _ = bufs; // hold bufs until after io completes [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "86ce802425afeb7151ef3446693c0051c38dda0f29ce004cc9562ba8036b5d1f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "86ce802425afeb7151ef3446693c0051c38dda0f29ce004cc9562ba8036b5d1f", kill_on_drop: false }` [INFO] [stdout] 86ce802425afeb7151ef3446693c0051c38dda0f29ce004cc9562ba8036b5d1f