[INFO] fetching crate pqgrams 0.9.2...
[INFO] checking pqgrams-0.9.2 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604
[INFO] extracting crate pqgrams 0.9.2 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate pqgrams 0.9.2 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 pqgrams 0.9.2
[INFO] finished tweaking crates.io crate pqgrams 0.9.2
[INFO] tweaked toml for crates.io crate pqgrams 0.9.2 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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb06fb61d390ee048ce0c82b19f2c4db7f05b815b00064165905856c096cd4f7
[INFO] running `Command { std: "docker" "start" "-a" "cb06fb61d390ee048ce0c82b19f2c4db7f05b815b00064165905856c096cd4f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb06fb61d390ee048ce0c82b19f2c4db7f05b815b00064165905856c096cd4f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb06fb61d390ee048ce0c82b19f2c4db7f05b815b00064165905856c096cd4f7", kill_on_drop: false }`
[INFO] [stdout] cb06fb61d390ee048ce0c82b19f2c4db7f05b815b00064165905856c096cd4f7
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 172f5a132cf0c2c6e7284a0b7eb53f261f612b7fe4dcd86ebd1772c9cdcf443b
[INFO] running `Command { std: "docker" "start" "-a" "172f5a132cf0c2c6e7284a0b7eb53f261f612b7fe4dcd86ebd1772c9cdcf443b", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking pqgrams v0.9.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/pqgrams.rs:104:141
[INFO] [stdout]     |
[INFO] [stdout] 104 | ...value: Option<L>, distance_function: Box<Fn(&PQGram<L>, &PQGram<L>, L)->(f64, cmp::Ordering)>) -> f64
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub fn pqgram_profile_intersection<L, T>(left: &Vec<PQGram<L>>, right: &Vec<PQGram<L>>, alt_filler_value: Option<L>, distance_function: Box<dyn Fn(&PQGram<L>, &PQGram<L>, L)->(f64, cmp::Ordering)>) -> f64
[INFO] [stdout]     |                                                                                                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/pqgrams.rs:157:146
[INFO] [stdout]     |
[INFO] [stdout] 157 | ...value: Option<L>, distance_function: Box<Fn(&PQGram<L>, &PQGram<L>, L)->(f64, cmp::Ordering)>) -> f64
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 157 | pub fn pqgram_distance_with_fn<L: 'static, T>(left: &Vec<PQGram<L>>, right: &Vec<PQGram<L>>, alt_filler_value: Option<L>, distance_function: Box<dyn Fn(&PQGram<L>, &PQGram<L>, L)->(f64, cmp::Ordering)>) -> f64
[INFO] [stdout]     |                                                                                                                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/pqgrams.rs:104:141
[INFO] [stdout]     |
[INFO] [stdout] 104 | ...value: Option<L>, distance_function: Box<Fn(&PQGram<L>, &PQGram<L>, L)->(f64, cmp::Ordering)>) -> f64
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub fn pqgram_profile_intersection<L, T>(left: &Vec<PQGram<L>>, right: &Vec<PQGram<L>>, alt_filler_value: Option<L>, distance_function: Box<dyn Fn(&PQGram<L>, &PQGram<L>, L)->(f64, cmp::Ordering)>) -> f64
[INFO] [stdout]     |                                                                                                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/pqgrams.rs:157:146
[INFO] [stdout]     |
[INFO] [stdout] 157 | ...value: Option<L>, distance_function: Box<Fn(&PQGram<L>, &PQGram<L>, L)->(f64, cmp::Ordering)>) -> f64
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 157 | pub fn pqgram_distance_with_fn<L: 'static, T>(left: &Vec<PQGram<L>>, right: &Vec<PQGram<L>>, alt_filler_value: Option<L>, distance_function: Box<dyn Fn(&PQGram<L>, &PQGram<L>, L)->(f64, cmp::Ordering)>) -> f64
[INFO] [stdout]     |                                                                                                                                                  +++
[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/pqgrams.rs:98:36
[INFO] [stdout]    |
[INFO] [stdout] 98 |            .map(|gram| gram.concat(filler_as.clone()))
[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/pqgrams.rs:170:67
[INFO] [stdout]     |
[INFO] [stdout] 167 | pub fn pqgram_distance<L: 'static, T>(left: &Vec<PQGram<L>>, right: &Vec<PQGram<L>>, alt_filler_value: Option<L>) -> f64
[INFO] [stdout]     |                                                                                      --------------------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 170 |     pqgram_distance_with_fn::<L,T>(left, right, alt_filler_value, Box::new(default_gram_edit_distance))
[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/default_tree.rs:31:38
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new(label: T) -> Tree<T> {
[INFO] [stdout]    |                -------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 31 |         Tree{label: label, children: Box::new(vec![])}
[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; 2 warnings emitted
[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/pqgrams.rs:98:36
[INFO] [stdout]    |
[INFO] [stdout] 98 |            .map(|gram| gram.concat(filler_as.clone()))
[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] [stderr] error: could not compile `pqgrams` (lib) due to 4 previous errors; 2 warnings emitted
[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/pqgrams.rs:170:67
[INFO] [stdout]     |
[INFO] [stdout] 167 | pub fn pqgram_distance<L: 'static, T>(left: &Vec<PQGram<L>>, right: &Vec<PQGram<L>>, alt_filler_value: Option<L>) -> f64
[INFO] [stdout]     |                                                                                      --------------------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 170 |     pqgram_distance_with_fn::<L,T>(left, right, alt_filler_value, Box::new(default_gram_edit_distance))
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[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/default_tree.rs:31:38
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new(label: T) -> Tree<T> {
[INFO] [stdout]    |                -------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 31 |         Tree{label: label, children: Box::new(vec![])}
[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; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pqgrams` (lib test) due to 4 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "172f5a132cf0c2c6e7284a0b7eb53f261f612b7fe4dcd86ebd1772c9cdcf443b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "172f5a132cf0c2c6e7284a0b7eb53f261f612b7fe4dcd86ebd1772c9cdcf443b", kill_on_drop: false }`
[INFO] [stdout] 172f5a132cf0c2c6e7284a0b7eb53f261f612b7fe4dcd86ebd1772c9cdcf443b