[INFO] fetching crate unsync 0.1.2...
[INFO] building unsync-0.1.2 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate unsync 0.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate unsync 0.1.2 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unsync 0.1.2
[INFO] finished tweaking crates.io crate unsync 0.1.2
[INFO] tweaked toml for crates.io crate unsync 0.1.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 86 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.4.0 (available: v0.5.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01fadc5106f8869d0a1d9713f322b7354347e1c976c03cf7f6462c9609be6204
[INFO] running `Command { std: "docker" "start" "-a" "01fadc5106f8869d0a1d9713f322b7354347e1c976c03cf7f6462c9609be6204", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01fadc5106f8869d0a1d9713f322b7354347e1c976c03cf7f6462c9609be6204", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01fadc5106f8869d0a1d9713f322b7354347e1c976c03cf7f6462c9609be6204", kill_on_drop: false }`
[INFO] [stdout] 01fadc5106f8869d0a1d9713f322b7354347e1c976c03cf7f6462c9609be6204
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f70f80293eb84949716d714a347f2e722151d46b0ff5ba18bd47e7cea6d35313
[INFO] running `Command { std: "docker" "start" "-a" "f70f80293eb84949716d714a347f2e722151d46b0ff5ba18bd47e7cea6d35313", kill_on_drop: false }`
[INFO] [stderr]    Compiling unsync v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/broad_rc.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let mut inner = &mut (*self.inner.as_ptr());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: relative drop order changing in Rust 2024
[INFO] [stdout]    --> src/semaphore.rs:263:49
[INFO] [stdout]     |
[INFO] [stdout] 259 |             if let Some(guard) = self.try_acquire(to_acquire) {
[INFO] [stdout]     |                                  ----------------------------
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this value will be stored in a temporary; let us call it `#1`
[INFO] [stdout]     |                                  `#1` will be dropped later as of Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 263 |             match self.waiters.wait(to_acquire).await {
[INFO] [stdout]     |                   ------------------------------^^^^^
[INFO] [stdout]     |                   |                             |
[INFO] [stdout]     |                   |                             this value will be stored in a temporary; let us call it `#2`
[INFO] [stdout]     |                   |                             up until Edition 2021 `#2` is dropped last but will be dropped earlier in Edition 2024
[INFO] [stdout]     |                   `__awaitee` calls a custom destructor
[INFO] [stdout]     |                   `__awaitee` will be dropped later as of Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 272 |         }
[INFO] [stdout]     |         - now the temporary value is dropped here, before the local variables in the block or statement
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/temporary-tail-expr-scope.html>
[INFO] [stdout] note: `#2` invokes this custom destructor
[INFO] [stdout]    --> src/wait_list.rs:501:1
[INFO] [stdout]     |
[INFO] [stdout] 501 | / impl<I, O> Drop for WaitInner<'_, '_, I, O> {
[INFO] [stdout] 502 | |     fn drop(&mut self) {
[INFO] [stdout] 503 | |         let mut list = match self.list.try_borrow() {
[INFO] [stdout] 504 | |             Some(guard) => guard,
[INFO] [stdout] ...   |
[INFO] [stdout] 516 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] note: `#2` invokes this custom destructor
[INFO] [stdout]    --> src/wait_list.rs:195:1
[INFO] [stdout]     |
[INFO] [stdout] 195 | / impl<I, O> Drop for Waiter<I, O> {
[INFO] [stdout] 196 | |     fn drop(&mut self) {
[INFO] [stdout] 197 | |         unsafe {
[INFO] [stdout] 198 | |             if self.waker.is_some() {
[INFO] [stdout] ...   |
[INFO] [stdout] 205 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] note: `#1` invokes this custom destructor
[INFO] [stdout]    --> src/semaphore.rs:467:1
[INFO] [stdout]     |
[INFO] [stdout] 467 | / impl Drop for Permit<'_> {
[INFO] [stdout] 468 | |     fn drop(&mut self) {
[INFO] [stdout] 469 | |         self.semaphore()
[INFO] [stdout] 470 | |             .release_permits(self.permits(), WakeUp::Unfair);
[INFO] [stdout] 471 | |     }
[INFO] [stdout] 472 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] note: `__awaitee` invokes this custom destructor
[INFO] [stdout]    --> src/wait_list.rs:501:1
[INFO] [stdout]     |
[INFO] [stdout] 501 | / impl<I, O> Drop for WaitInner<'_, '_, I, O> {
[INFO] [stdout] 502 | |     fn drop(&mut self) {
[INFO] [stdout] 503 | |         let mut list = match self.list.try_borrow() {
[INFO] [stdout] 504 | |             Some(guard) => guard,
[INFO] [stdout] ...   |
[INFO] [stdout] 516 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] note: `__awaitee` invokes this custom destructor
[INFO] [stdout]    --> src/wait_list.rs:195:1
[INFO] [stdout]     |
[INFO] [stdout] 195 | / impl<I, O> Drop for Waiter<I, O> {
[INFO] [stdout] 196 | |     fn drop(&mut self) {
[INFO] [stdout] 197 | |         unsafe {
[INFO] [stdout] 198 | |             if self.waker.is_some() {
[INFO] [stdout] ...   |
[INFO] [stdout] 205 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     = note: most of the time, changing drop order is harmless; inspect the `impl Drop`s for side effects like releasing locks or sending messages
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: relative drop order changing in Rust 2024
[INFO] [stdout]    --> src/semaphore.rs:310:49
[INFO] [stdout]     |
[INFO] [stdout] 306 |             if let Some(guard) = self.try_acquire_unfair(to_acquire) {
[INFO] [stdout]     |                                  -----------------------------------
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  this value will be stored in a temporary; let us call it `#1`
[INFO] [stdout]     |                                  `#1` will be dropped later as of Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 310 |             match self.waiters.wait(to_acquire).await {
[INFO] [stdout]     |                   ------------------------------^^^^^
[INFO] [stdout]     |                   |                             |
[INFO] [stdout]     |                   |                             this value will be stored in a temporary; let us call it `#2`
[INFO] [stdout]     |                   |                             up until Edition 2021 `#2` is dropped last but will be dropped earlier in Edition 2024
[INFO] [stdout]     |                   `__awaitee` calls a custom destructor
[INFO] [stdout]     |                   `__awaitee` will be dropped later as of Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 319 |         }
[INFO] [stdout]     |         - now the temporary value is dropped here, before the local variables in the block or statement
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/temporary-tail-expr-scope.html>
[INFO] [stdout] note: `#2` invokes this custom destructor
[INFO] [stdout]    --> src/wait_list.rs:501:1
[INFO] [stdout]     |
[INFO] [stdout] 501 | / impl<I, O> Drop for WaitInner<'_, '_, I, O> {
[INFO] [stdout] 502 | |     fn drop(&mut self) {
[INFO] [stdout] 503 | |         let mut list = match self.list.try_borrow() {
[INFO] [stdout] 504 | |             Some(guard) => guard,
[INFO] [stdout] ...   |
[INFO] [stdout] 516 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] note: `#2` invokes this custom destructor
[INFO] [stdout]    --> src/wait_list.rs:195:1
[INFO] [stdout]     |
[INFO] [stdout] 195 | / impl<I, O> Drop for Waiter<I, O> {
[INFO] [stdout] 196 | |     fn drop(&mut self) {
[INFO] [stdout] 197 | |         unsafe {
[INFO] [stdout] 198 | |             if self.waker.is_some() {
[INFO] [stdout] ...   |
[INFO] [stdout] 205 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] note: `#1` invokes this custom destructor
[INFO] [stdout]    --> src/semaphore.rs:467:1
[INFO] [stdout]     |
[INFO] [stdout] 467 | / impl Drop for Permit<'_> {
[INFO] [stdout] 468 | |     fn drop(&mut self) {
[INFO] [stdout] 469 | |         self.semaphore()
[INFO] [stdout] 470 | |             .release_permits(self.permits(), WakeUp::Unfair);
[INFO] [stdout] 471 | |     }
[INFO] [stdout] 472 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] note: `__awaitee` invokes this custom destructor
[INFO] [stdout]    --> src/wait_list.rs:501:1
[INFO] [stdout]     |
[INFO] [stdout] 501 | / impl<I, O> Drop for WaitInner<'_, '_, I, O> {
[INFO] [stdout] 502 | |     fn drop(&mut self) {
[INFO] [stdout] 503 | |         let mut list = match self.list.try_borrow() {
[INFO] [stdout] 504 | |             Some(guard) => guard,
[INFO] [stdout] ...   |
[INFO] [stdout] 516 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] note: `__awaitee` invokes this custom destructor
[INFO] [stdout]    --> src/wait_list.rs:195:1
[INFO] [stdout]     |
[INFO] [stdout] 195 | / impl<I, O> Drop for Waiter<I, O> {
[INFO] [stdout] 196 | |     fn drop(&mut self) {
[INFO] [stdout] 197 | |         unsafe {
[INFO] [stdout] 198 | |             if self.waker.is_some() {
[INFO] [stdout] ...   |
[INFO] [stdout] 205 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     = note: most of the time, changing drop order is harmless; inspect the `impl Drop`s for side effects like releasing locks or sending messages
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unsync` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f70f80293eb84949716d714a347f2e722151d46b0ff5ba18bd47e7cea6d35313", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f70f80293eb84949716d714a347f2e722151d46b0ff5ba18bd47e7cea6d35313", kill_on_drop: false }`
[INFO] [stdout] f70f80293eb84949716d714a347f2e722151d46b0ff5ba18bd47e7cea6d35313