[INFO] fetching crate rcref 0.1.0...
[INFO] checking rcref-0.1.0 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604
[INFO] extracting crate rcref 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate rcref 0.1.0 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 rcref 0.1.0
[INFO] finished tweaking crates.io crate rcref 0.1.0
[INFO] tweaked toml for crates.io crate rcref 0.1.0 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] f719ea7aa3159a6e02dd098df8aba49d25d9b5f05f4649486cdc045361d1da07
[INFO] running `Command { std: "docker" "start" "-a" "f719ea7aa3159a6e02dd098df8aba49d25d9b5f05f4649486cdc045361d1da07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f719ea7aa3159a6e02dd098df8aba49d25d9b5f05f4649486cdc045361d1da07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f719ea7aa3159a6e02dd098df8aba49d25d9b5f05f4649486cdc045361d1da07", kill_on_drop: false }`
[INFO] [stdout] f719ea7aa3159a6e02dd098df8aba49d25d9b5f05f4649486cdc045361d1da07
[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] 7e18ed37d351e80a77103c1eecd0e3e7c0d9e7c8d8460bb0af1c29f9b2a0d220
[INFO] running `Command { std: "docker" "start" "-a" "7e18ed37d351e80a77103c1eecd0e3e7c0d9e7c8d8460bb0af1c29f9b2a0d220", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking rcref 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]   --> lib.rs:22:44
[INFO] [stdout]    |
[INFO] [stdout] 21 |       pub fn new_opt<F>(rc: Rc<T>, f: F) -> Option<RcRef<T, U>> where F: FnOnce(&T) -> Option<&U> {
[INFO] [stdout]    |                         ---------  ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 22 |           f(&*rc).map(|r| r as *const U).map(move |r| RcRef {
[INFO] [stdout]    |  ____________________________________________^
[INFO] [stdout] 23 | |             _reference: r,
[INFO] [stdout] 24 | |             _keep_alive: rc,
[INFO] [stdout] 25 | |         })
[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 `rcref` (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]   --> lib.rs:22:44
[INFO] [stdout]    |
[INFO] [stdout] 21 |       pub fn new_opt<F>(rc: Rc<T>, f: F) -> Option<RcRef<T, U>> where F: FnOnce(&T) -> Option<&U> {
[INFO] [stdout]    |                         ---------  ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 22 |           f(&*rc).map(|r| r as *const U).map(move |r| RcRef {
[INFO] [stdout]    |  ____________________________________________^
[INFO] [stdout] 23 | |             _reference: r,
[INFO] [stdout] 24 | |             _keep_alive: rc,
[INFO] [stdout] 25 | |         })
[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 `rcref` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "7e18ed37d351e80a77103c1eecd0e3e7c0d9e7c8d8460bb0af1c29f9b2a0d220", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e18ed37d351e80a77103c1eecd0e3e7c0d9e7c8d8460bb0af1c29f9b2a0d220", kill_on_drop: false }`
[INFO] [stdout] 7e18ed37d351e80a77103c1eecd0e3e7c0d9e7c8d8460bb0af1c29f9b2a0d220