[INFO] fetching crate request-channel 0.1.1...
[INFO] checking request-channel-0.1.1 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate request-channel 0.1.1 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate request-channel 0.1.1 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 request-channel 0.1.1
[INFO] finished tweaking crates.io crate request-channel 0.1.1
[INFO] tweaked toml for crates.io crate request-channel 0.1.1 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 18 packages to latest compatible versions
[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] 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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6bef93765f839d3a6f85151362a7c9471890ac737862b553b3d18b5bbcb2fbc1
[INFO] running `Command { std: "docker" "start" "-a" "6bef93765f839d3a6f85151362a7c9471890ac737862b553b3d18b5bbcb2fbc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6bef93765f839d3a6f85151362a7c9471890ac737862b553b3d18b5bbcb2fbc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bef93765f839d3a6f85151362a7c9471890ac737862b553b3d18b5bbcb2fbc1", kill_on_drop: false }`
[INFO] [stdout] 6bef93765f839d3a6f85151362a7c9471890ac737862b553b3d18b5bbcb2fbc1
[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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 279d87a1abb23baa6173f29d6a3170e341edd737812a2f3e4d5da117adcc8efb
[INFO] running `Command { std: "docker" "start" "-a" "279d87a1abb23baa6173f29d6a3170e341edd737812a2f3e4d5da117adcc8efb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking request-channel v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this value of type `std::sync::MutexGuard<'_, HashMap<u32, Option<Option<R>>>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lib.rs:100:30
[INFO] [stdout]     |
[INFO] [stdout] 99  |     fn put_in_buffer(&self, id: Id, message: Option<R>) {
[INFO] [stdout]     |                                     ------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 100 |         if let Some(value) = self.buffer.lock().unwrap().get_mut(&id) {
[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 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `request-channel` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this value of type `std::sync::MutexGuard<'_, HashMap<u32, Option<Option<R>>>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lib.rs:100:30
[INFO] [stdout]     |
[INFO] [stdout] 99  |     fn put_in_buffer(&self, id: Id, message: Option<R>) {
[INFO] [stdout]     |                                     ------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 100 |         if let Some(value) = self.buffer.lock().unwrap().get_mut(&id) {
[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 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `request-channel` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "279d87a1abb23baa6173f29d6a3170e341edd737812a2f3e4d5da117adcc8efb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "279d87a1abb23baa6173f29d6a3170e341edd737812a2f3e4d5da117adcc8efb", kill_on_drop: false }`
[INFO] [stdout] 279d87a1abb23baa6173f29d6a3170e341edd737812a2f3e4d5da117adcc8efb