[INFO] fetching crate chain_reaction 0.2.50...
[INFO] checking chain_reaction-0.2.50 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate chain_reaction 0.2.50 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate chain_reaction 0.2.50 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 chain_reaction 0.2.50
[INFO] finished tweaking crates.io crate chain_reaction 0.2.50
[INFO] tweaked toml for crates.io crate chain_reaction 0.2.50 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate chain_reaction 0.2.50 already has a lockfile, it will not be regenerated
[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] 4a3c5ffae8f3c6a9454e6b61789ef15311f516b3f826e943f4f6adaa8afe1c25
[INFO] running `Command { std: "docker" "start" "-a" "4a3c5ffae8f3c6a9454e6b61789ef15311f516b3f826e943f4f6adaa8afe1c25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a3c5ffae8f3c6a9454e6b61789ef15311f516b3f826e943f4f6adaa8afe1c25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a3c5ffae8f3c6a9454e6b61789ef15311f516b3f826e943f4f6adaa8afe1c25", kill_on_drop: false }`
[INFO] [stdout] 4a3c5ffae8f3c6a9454e6b61789ef15311f516b3f826e943f4f6adaa8afe1c25
[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] 9f2b5bf413ce486ea13ce0e81ba615bf6c3bffca427f451f0772bcfb120ebfbb
[INFO] running `Command { std: "docker" "start" "-a" "9f2b5bf413ce486ea13ce0e81ba615bf6c3bffca427f451f0772bcfb120ebfbb", kill_on_drop: false }`
[INFO] [stderr]     Checking chain_reaction v0.2.50 (/opt/rustwide/workdir)
[INFO] [stdout] error: this value of type `(Option<<I as IntoIterator>::Item>, Option<<I as IntoIterator>::Item>)` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lib.rs:193:23
[INFO] [stdout]     |
[INFO] [stdout] 192 |                 let mut iter = i.into_iter();
[INFO] [stdout]     |                     -------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 193 |                 match (iter.next(), iter.next()) {
[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] error: this value of type `RefMut<'_, Reactor<I, E>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lib.rs:346:10
[INFO] [stdout]     |
[INFO] [stdout] 345 |     pub fn run(self) -> (Out<I, E>, HashMap<String, Duration>) {
[INFO] [stdout]     |                ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 346 |         (self.reactor.borrow_mut().run(), self.timings.borrow().clone())
[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] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `(Option<<I as IntoIterator>::Item>, Option<<I as IntoIterator>::Item>)` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lib.rs:193:23
[INFO] [stdout]     |
[INFO] [stdout] 192 |                 let mut iter = i.into_iter();
[INFO] [stdout]     |                     -------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 193 |                 match (iter.next(), iter.next()) {
[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] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chain_reaction` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this value of type `RefMut<'_, Reactor<I, E>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lib.rs:346:10
[INFO] [stdout]     |
[INFO] [stdout] 345 |     pub fn run(self) -> (Out<I, E>, HashMap<String, Duration>) {
[INFO] [stdout]     |                ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 346 |         (self.reactor.borrow_mut().run(), self.timings.borrow().clone())
[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] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chain_reaction` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "9f2b5bf413ce486ea13ce0e81ba615bf6c3bffca427f451f0772bcfb120ebfbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f2b5bf413ce486ea13ce0e81ba615bf6c3bffca427f451f0772bcfb120ebfbb", kill_on_drop: false }`
[INFO] [stdout] 9f2b5bf413ce486ea13ce0e81ba615bf6c3bffca427f451f0772bcfb120ebfbb