[INFO] fetching crate demes-forward 0.5.0...
[INFO] checking demes-forward-0.5.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate demes-forward 0.5.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate demes-forward 0.5.0 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 demes-forward 0.5.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate demes-forward 0.5.0
[INFO] tweaked toml for crates.io crate demes-forward 0.5.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate demes-forward 0.5.0 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 3067f3ddf8500d08ab2637a433b7aea5953a055a742fbe27e5b5d83d41e98d4b
[INFO] running `Command { std: "docker" "start" "-a" "3067f3ddf8500d08ab2637a433b7aea5953a055a742fbe27e5b5d83d41e98d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3067f3ddf8500d08ab2637a433b7aea5953a055a742fbe27e5b5d83d41e98d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3067f3ddf8500d08ab2637a433b7aea5953a055a742fbe27e5b5d83d41e98d4b", kill_on_drop: false }`
[INFO] [stdout] 3067f3ddf8500d08ab2637a433b7aea5953a055a742fbe27e5b5d83d41e98d4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 9ebd3fbd83ac03f20455a85aac89730d221f89f573f5a46ef1dc3ae7a2c4ca74
[INFO] running `Command { std: "docker" "start" "-a" "9ebd3fbd83ac03f20455a85aac89730d221f89f573f5a46ef1dc3ae7a2c4ca74", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.74
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking unsafe-libyaml v0.2.10
[INFO] [stderr]    Compiling demes v0.6.0
[INFO] [stderr]    Compiling anyhow v1.0.80
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.46
[INFO] [stderr]     Checking regex-automata v0.3.9
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]     Checking regex v1.9.6
[INFO] [stderr]     Checking serde_yaml v0.9.21
[INFO] [stderr]     Checking demes-forward v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/graph.rs:589:91
[INFO] [stdout]     |
[INFO] [stdout] 589 |     fn get_slice_if<'a, T: Sized>(&'a self, generation: Generation, s: &'a [T]) -> Option<&[T]> {
[INFO] [stdout]     |                     -- lifetime `'a` declared here                                        ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/graph.rs:589:91
[INFO] [stdout]     |
[INFO] [stdout] 589 |     fn get_slice_if<'a, T: Sized>(&'a self, generation: Generation, s: &'a [T]) -> Option<&[T]> {
[INFO] [stdout]     |                     -- lifetime `'a` declared here                                        ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `Result<Option<current_size::CurrentSize>, DemesForwardError>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]     --> src/graph.rs:2080:19
[INFO] [stdout]      |
[INFO] [stdout] 2077 |         let mut graph = ForwardGraph::new_discrete_time(demes_graph, 0).unwrap();
[INFO] [stdout]      |             --------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 2080 |             match graph.child_demes[child_deme].current_size() {
[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; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `demes-forward` (lib test) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "9ebd3fbd83ac03f20455a85aac89730d221f89f573f5a46ef1dc3ae7a2c4ca74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ebd3fbd83ac03f20455a85aac89730d221f89f573f5a46ef1dc3ae7a2c4ca74", kill_on_drop: false }`
[INFO] [stdout] 9ebd3fbd83ac03f20455a85aac89730d221f89f573f5a46ef1dc3ae7a2c4ca74