[INFO] fetching crate rwcell 0.1.2...
[INFO] checking rwcell-0.1.2 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604
[INFO] extracting crate rwcell 0.1.2 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate rwcell 0.1.2 on toolchain 4d98531622e1718ae0bc3c7a1ab9cd8938428452
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rwcell 0.1.2
[INFO] finished tweaking crates.io crate rwcell 0.1.2
[INFO] tweaked toml for crates.io crate rwcell 0.1.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14d091aa6b30728e45dc64c02266c1f88ae6a178f7001764907b8de8af0beae0
[INFO] running `Command { std: "docker" "start" "-a" "14d091aa6b30728e45dc64c02266c1f88ae6a178f7001764907b8de8af0beae0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14d091aa6b30728e45dc64c02266c1f88ae6a178f7001764907b8de8af0beae0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14d091aa6b30728e45dc64c02266c1f88ae6a178f7001764907b8de8af0beae0", kill_on_drop: false }`
[INFO] [stdout] 14d091aa6b30728e45dc64c02266c1f88ae6a178f7001764907b8de8af0beae0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1db78e7f62b5a02c9233e0db2def4157b9e020995f36a3fb9d1f47a66165ff07
[INFO] running `Command { std: "docker" "start" "-a" "1db78e7f62b5a02c9233e0db2def4157b9e020995f36a3fb9d1f47a66165ff07", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking rwcell v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/rwcell.rs:48:55
[INFO] [stdout]    |
[INFO] [stdout] 48 |             values: unsafe { Some(UnsafeCell::new([value, mem::uninitialized(), mem::uninitialized()])) },
[INFO] [stdout]    |                                                                ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/rwcell.rs:48:77
[INFO] [stdout]    |
[INFO] [stdout] 48 |             values: unsafe { Some(UnsafeCell::new([value, mem::uninitialized(), mem::uninitialized()])) },
[INFO] [stdout]    |                                                                                      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `time2` has been stable since 1.8.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(time2)]
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lib.rs:39:3
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn make_rw_cell<T>(initial: T) -> (CellWrite<T>, CellRead<T>) {
[INFO] [stdout]    |                        ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 38 |     let irc = Arc::new(RWCell::new(initial));
[INFO] [stdout]    |         --- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 39 |     (CellWrite(irc.clone()), CellRead(irc))
[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: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lib.rs:39:27
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn make_rw_cell<T>(initial: T) -> (CellWrite<T>, CellRead<T>) {
[INFO] [stdout]    |                        ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 38 |     let irc = Arc::new(RWCell::new(initial));
[INFO] [stdout]    |         --- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 39 |     (CellWrite(irc.clone()), CellRead(irc))
[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: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/rwcell.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn new(value: T) -> RWCell<T> {
[INFO] [stdout]    |                -------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 47 |         RWCell {
[INFO] [stdout] 48 |             values: unsafe { Some(UnsafeCell::new([value, mem::uninitialized(), mem::uninitialized()])) },
[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 3 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rwcell` (lib test) due to 4 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1db78e7f62b5a02c9233e0db2def4157b9e020995f36a3fb9d1f47a66165ff07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1db78e7f62b5a02c9233e0db2def4157b9e020995f36a3fb9d1f47a66165ff07", kill_on_drop: false }`
[INFO] [stdout] 1db78e7f62b5a02c9233e0db2def4157b9e020995f36a3fb9d1f47a66165ff07