[INFO] cloning repository https://github.com/bp7968h/l_lists
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bp7968h/l_lists" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbp7968h%2Fl_lists", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbp7968h%2Fl_lists'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2b9a3a25faa231eb717fca88920bef4170b3419d
[INFO] checking bp7968h/l_lists/2b9a3a25faa231eb717fca88920bef4170b3419d against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbp7968h%2Fl_lists" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bp7968h/l_lists 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 git repo https://github.com/bp7968h/l_lists
[INFO] finished tweaking git repo https://github.com/bp7968h/l_lists
[INFO] tweaked toml for git repo https://github.com/bp7968h/l_lists written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/bp7968h/l_lists 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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 4afc228f26151e86a5f6604909f6da79757b161eb67a17c1d3ef15c0cdd1d2c5
[INFO] running `Command { std: "docker" "start" "-a" "4afc228f26151e86a5f6604909f6da79757b161eb67a17c1d3ef15c0cdd1d2c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4afc228f26151e86a5f6604909f6da79757b161eb67a17c1d3ef15c0cdd1d2c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4afc228f26151e86a5f6604909f6da79757b161eb67a17c1d3ef15c0cdd1d2c5", kill_on_drop: false }`
[INFO] [stdout] 4afc228f26151e86a5f6604909f6da79757b161eb67a17c1d3ef15c0cdd1d2c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] da2bd10cfb0f92312ad4fac1b4490c7783e9909f9b81d7483f01d20e8fb0b8a8
[INFO] running `Command { std: "docker" "start" "-a" "da2bd10cfb0f92312ad4fac1b4490c7783e9909f9b81d7483f01d20e8fb0b8a8", kill_on_drop: false }`
[INFO] [stderr]     Checking l_lists v0.1.0 (/opt/rustwide/workdir)
[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/third.rs:18:22
[INFO] [stdout]    |
[INFO] [stdout] 17 |       pub fn prepend(&self, elem: T) -> List<T> {
[INFO] [stdout]    |                             ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 18 |           List { head: Some(Rc::new(Node{
[INFO] [stdout]    |  ______________________^
[INFO] [stdout] 19 | |             elem: elem,
[INFO] [stdout] 20 | |             next: self.head.clone()
[INFO] [stdout] 21 | |         }))}
[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 `l_lists` (lib) due to 2 previous errors
[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/third.rs:18:22
[INFO] [stdout]    |
[INFO] [stdout] 17 |       pub fn prepend(&self, elem: T) -> List<T> {
[INFO] [stdout]    |                             ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 18 |           List { head: Some(Rc::new(Node{
[INFO] [stdout]    |  ______________________^
[INFO] [stdout] 19 | |             elem: elem,
[INFO] [stdout] 20 | |             next: self.head.clone()
[INFO] [stdout] 21 | |         }))}
[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 `l_lists` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "da2bd10cfb0f92312ad4fac1b4490c7783e9909f9b81d7483f01d20e8fb0b8a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da2bd10cfb0f92312ad4fac1b4490c7783e9909f9b81d7483f01d20e8fb0b8a8", kill_on_drop: false }`
[INFO] [stdout] da2bd10cfb0f92312ad4fac1b4490c7783e9909f9b81d7483f01d20e8fb0b8a8