[INFO] fetching crate wolfram-expr 0.1.4...
[INFO] checking wolfram-expr-0.1.4 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate wolfram-expr 0.1.4 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate wolfram-expr 0.1.4 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 wolfram-expr 0.1.4
[INFO] finished tweaking crates.io crate wolfram-expr 0.1.4
[INFO] tweaked toml for crates.io crate wolfram-expr 0.1.4 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 3 packages to latest compatible versions
[INFO] [stderr]       Adding ordered-float v3.9.2 (available: v4.3.0)
[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] 8bbc81f8e95895ac4103d00a699d17faca3348b94cbeafb32b8e4a61ad263d75
[INFO] running `Command { std: "docker" "start" "-a" "8bbc81f8e95895ac4103d00a699d17faca3348b94cbeafb32b8e4a61ad263d75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8bbc81f8e95895ac4103d00a699d17faca3348b94cbeafb32b8e4a61ad263d75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bbc81f8e95895ac4103d00a699d17faca3348b94cbeafb32b8e4a61ad263d75", kill_on_drop: false }`
[INFO] [stdout] 8bbc81f8e95895ac4103d00a699d17faca3348b94cbeafb32b8e4a61ad263d75
[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] 8a56f428ba7aeb542bd3dbe9bf02caafc6ac57aeeddd841d82b9c6bdfc0b462d
[INFO] running `Command { std: "docker" "start" "-a" "8a56f428ba7aeb542bd3dbe9bf02caafc6ac57aeeddd841d82b9c6bdfc0b462d", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking ordered-float v3.9.2
[INFO] [stderr]     Checking wolfram-expr v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: this value of type `Result<ExprKind, std::sync::Arc<ExprKind>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lib.rs:85:15
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn to_kind(self) -> ExprKind {
[INFO] [stdout]    |                    ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 85 |         match Arc::try_unwrap(self.inner) {
[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 `wolfram-expr` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this value of type `Result<ExprKind, std::sync::Arc<ExprKind>>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lib.rs:85:15
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn to_kind(self) -> ExprKind {
[INFO] [stdout]    |                    ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 85 |         match Arc::try_unwrap(self.inner) {
[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 `wolfram-expr` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8a56f428ba7aeb542bd3dbe9bf02caafc6ac57aeeddd841d82b9c6bdfc0b462d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a56f428ba7aeb542bd3dbe9bf02caafc6ac57aeeddd841d82b9c6bdfc0b462d", kill_on_drop: false }`
[INFO] [stdout] 8a56f428ba7aeb542bd3dbe9bf02caafc6ac57aeeddd841d82b9c6bdfc0b462d