[INFO] fetching crate tree_iterators_rs 1.2.1... [INFO] checking tree_iterators_rs-1.2.1 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864 [INFO] extracting crate tree_iterators_rs 1.2.1 into /workspace/builds/worker-2-tc2/source [INFO] validating manifest of crates.io crate tree_iterators_rs 1.2.1 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 tree_iterators_rs 1.2.1 [INFO] finished tweaking crates.io crate tree_iterators_rs 1.2.1 [INFO] tweaked toml for crates.io crate tree_iterators_rs 1.2.1 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 7 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] 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] 04a1f94224b4386443db21fdcd037560393cbc72c27a5e90774592567816d87e [INFO] running `Command { std: "docker" "start" "-a" "04a1f94224b4386443db21fdcd037560393cbc72c27a5e90774592567816d87e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "04a1f94224b4386443db21fdcd037560393cbc72c27a5e90774592567816d87e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "04a1f94224b4386443db21fdcd037560393cbc72c27a5e90774592567816d87e", kill_on_drop: false }` [INFO] [stdout] 04a1f94224b4386443db21fdcd037560393cbc72c27a5e90774592567816d87e [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] 3c06705dad7330a0273b1fc3d8ff802ade650752ac800cbfb0ec10740465b770 [INFO] running `Command { std: "docker" "start" "-a" "3c06705dad7330a0273b1fc3d8ff802ade650752ac800cbfb0ec10740465b770", kill_on_drop: false }` [INFO] [stderr] Checking streaming-iterator v0.1.9 [INFO] [stderr] Checking tree_iterators_rs v1.2.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/dfs_inorder_iterators/borrow.rs:91:81 [INFO] [stdout] | [INFO] [stdout] 87 | impl<'a, Node> BorrowedDFSInorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 91 | pub(crate) fn new(root: &'a Node) -> BorrowedDFSInorderIteratorWithAncestors { [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: elided lifetime has a name [INFO] [stdout] --> src/dfs_postorder_iterators/borrow.rs:85:73 [INFO] [stdout] | [INFO] [stdout] 81 | impl<'a, Node> BorrowedDFSPostorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 85 | fn new(root: &'a Node) -> BorrowedDFSPostorderIteratorWithAncestors<'_, Node> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/dfs_postorder_iterators/borrow.rs:182:79 [INFO] [stdout] | [INFO] [stdout] 178 | impl<'a, Node> BorrowedBinaryDFSPostorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 182 | fn new(root: &'a Node) -> BorrowedBinaryDFSPostorderIteratorWithAncestors<'_, Node> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/dfs_postorder_iterators/mut_borrow.rs:85:80 [INFO] [stdout] | [INFO] [stdout] 81 | impl<'a, Node> MutBorrowedDFSPostorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 85 | fn new(root: &'a mut Node) -> MutBorrowedDFSPostorderIteratorWithAncestors<'_, Node> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/dfs_postorder_iterators/mut_borrow.rs:189:86 [INFO] [stdout] | [INFO] [stdout] 185 | impl<'a, Node> MutBorrowedBinaryDFSPostorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 189 | fn new(root: &'a mut Node) -> MutBorrowedBinaryDFSPostorderIteratorWithAncestors<'_, Node> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/dfs_inorder_iterators/borrow.rs:91:81 [INFO] [stdout] | [INFO] [stdout] 87 | impl<'a, Node> BorrowedDFSInorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 91 | pub(crate) fn new(root: &'a Node) -> BorrowedDFSInorderIteratorWithAncestors { [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: elided lifetime has a name [INFO] [stdout] --> src/dfs_postorder_iterators/borrow.rs:85:73 [INFO] [stdout] | [INFO] [stdout] 81 | impl<'a, Node> BorrowedDFSPostorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 85 | fn new(root: &'a Node) -> BorrowedDFSPostorderIteratorWithAncestors<'_, Node> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/dfs_postorder_iterators/borrow.rs:182:79 [INFO] [stdout] | [INFO] [stdout] 178 | impl<'a, Node> BorrowedBinaryDFSPostorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 182 | fn new(root: &'a Node) -> BorrowedBinaryDFSPostorderIteratorWithAncestors<'_, Node> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/dfs_postorder_iterators/mut_borrow.rs:85:80 [INFO] [stdout] | [INFO] [stdout] 81 | impl<'a, Node> MutBorrowedDFSPostorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 85 | fn new(root: &'a mut Node) -> MutBorrowedDFSPostorderIteratorWithAncestors<'_, Node> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/dfs_postorder_iterators/mut_borrow.rs:189:86 [INFO] [stdout] | [INFO] [stdout] 185 | impl<'a, Node> MutBorrowedBinaryDFSPostorderIteratorWithAncestors<'a, Node> [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] ... [INFO] [stdout] 189 | fn new(root: &'a mut Node) -> MutBorrowedBinaryDFSPostorderIteratorWithAncestors<'_, Node> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this value of type `Enumerate as prelude::BorrowedBinaryTreeNode<'_>>::BorrowedValue> as Iterator>::Item>>` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/prelude.rs:3060:35 [INFO] [stdout] | [INFO] [stdout] 3048 | let mut test_tree = create_binary_tree_for_testing(); [INFO] [stdout] | ------------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 3060 | for (i, value) in preorder_iter_leaves.enumerate() { [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: this value of type `Enumerate as prelude::BorrowedBinaryTreeNode<'_>>::BorrowedValue> as Iterator>::Item>>` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/prelude.rs:3112:35 [INFO] [stdout] | [INFO] [stdout] 3096 | let mut test_tree = create_binary_tree_for_testing(); [INFO] [stdout] | ------------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 3112 | for (i, value) in inorder_iter_leaves.enumerate() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this value of type `Enumerate as prelude::BorrowedBinaryTreeNode<'_>>::BorrowedValue> as Iterator>::Item>>` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/prelude.rs:3173:35 [INFO] [stdout] | [INFO] [stdout] 3157 | let mut test_tree = create_binary_tree_for_testing(); [INFO] [stdout] | ------------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 3173 | for (i, value) in postorder_iter_leaves.enumerate() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this value of type `Enumerate as prelude::BorrowedBinaryTreeNode<'_>>::BorrowedValue> as Iterator>::Item>>` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/prelude.rs:3233:35 [INFO] [stdout] | [INFO] [stdout] 3221 | let mut test_tree = create_binary_tree_for_testing(); [INFO] [stdout] | ------------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 3233 | for (i, value) in bfs_iter_leaves.enumerate() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 4 previous errors; 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `tree_iterators_rs` (lib test) due to 5 previous errors; 5 warnings emitted [INFO] running `Command { std: "docker" "inspect" "3c06705dad7330a0273b1fc3d8ff802ade650752ac800cbfb0ec10740465b770", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3c06705dad7330a0273b1fc3d8ff802ade650752ac800cbfb0ec10740465b770", kill_on_drop: false }` [INFO] [stdout] 3c06705dad7330a0273b1fc3d8ff802ade650752ac800cbfb0ec10740465b770