[INFO] fetching crate simple_futures 0.1.2... [INFO] checking simple_futures-0.1.2 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930 [INFO] extracting crate simple_futures 0.1.2 into /workspace/builds/worker-2-tc2/source [INFO] validating manifest of crates.io crate simple_futures 0.1.2 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate simple_futures 0.1.2 [INFO] finished tweaking crates.io crate simple_futures 0.1.2 [INFO] tweaked toml for crates.io crate simple_futures 0.1.2 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Locking 17 packages to latest compatible versions [INFO] [stderr] Adding bitflags v1.3.2 (available: v2.6.0) [INFO] [stderr] Adding wasi v0.11.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 73301fb16c08147da2c2651e6d644a75c3fbabd9a3559650e66e76ca432c331f [INFO] running `Command { std: "docker" "start" "-a" "73301fb16c08147da2c2651e6d644a75c3fbabd9a3559650e66e76ca432c331f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "73301fb16c08147da2c2651e6d644a75c3fbabd9a3559650e66e76ca432c331f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "73301fb16c08147da2c2651e6d644a75c3fbabd9a3559650e66e76ca432c331f", kill_on_drop: false }` [INFO] [stdout] 73301fb16c08147da2c2651e6d644a75c3fbabd9a3559650e66e76ca432c331f [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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 85f7888bf363b89a183b6ddf0d6698965a8e4f3b09579550e22a8ef368525572 [INFO] running `Command { std: "docker" "start" "-a" "85f7888bf363b89a183b6ddf0d6698965a8e4f3b09579550e22a8ef368525572", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.159 [INFO] [stderr] Checking atomic_swapping v0.1.0 [INFO] [stderr] Compiling syn v2.0.79 [INFO] [stderr] Checking simple_futures v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] error: this value of type `Option>>>` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/value_future.rs:88:15 [INFO] [stdout] | [INFO] [stdout] 87 | pub fn assign(&self, val: T) -> Option> { [INFO] [stdout] | --- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] 88 | match self.inner.upgrade() { [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] warning: trait `EnsureSend` is never used [INFO] [stdout] --> src/lib.rs:16:7 [INFO] [stdout] | [INFO] [stdout] 16 | trait EnsureSend: Send {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `EnsureSync` is never used [INFO] [stdout] --> src/lib.rs:17:7 [INFO] [stdout] | [INFO] [stdout] 17 | trait EnsureSync: Sync {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `simple_futures` (lib) due to 2 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "85f7888bf363b89a183b6ddf0d6698965a8e4f3b09579550e22a8ef368525572", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "85f7888bf363b89a183b6ddf0d6698965a8e4f3b09579550e22a8ef368525572", kill_on_drop: false }` [INFO] [stdout] 85f7888bf363b89a183b6ddf0d6698965a8e4f3b09579550e22a8ef368525572