[INFO] fetching crate serde_fmt 1.0.3...
[INFO] checking serde_fmt-1.0.3 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate serde_fmt 1.0.3 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate serde_fmt 1.0.3 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 serde_fmt 1.0.3
[INFO] finished tweaking crates.io crate serde_fmt 1.0.3
[INFO] tweaked toml for crates.io crate serde_fmt 1.0.3 written to /workspace/builds/worker-4-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]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] d304054540ea167961ffae516365ce5242a2ba2dbff2e48aed719831998de5e8
[INFO] running `Command { std: "docker" "start" "-a" "d304054540ea167961ffae516365ce5242a2ba2dbff2e48aed719831998de5e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d304054540ea167961ffae516365ce5242a2ba2dbff2e48aed719831998de5e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d304054540ea167961ffae516365ce5242a2ba2dbff2e48aed719831998de5e8", kill_on_drop: false }`
[INFO] [stdout] d304054540ea167961ffae516365ce5242a2ba2dbff2e48aed719831998de5e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 5cc55099095650fe85ee2c909a2ba394ba4b3c7105441e2cfb0d498037cc1856
[INFO] running `Command { std: "docker" "start" "-a" "5cc55099095650fe85ee2c909a2ba394ba4b3c7105441e2cfb0d498037cc1856", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]     Checking serde_fmt v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: this value of type `ToDebug<impl Serialize>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lib.rs:62:38
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn to_writer(v: impl Serialize, mut w: impl fmt::Write) -> fmt::Result {
[INFO] [stdout]    |                                     ----- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 62 |     w.write_fmt(format_args!("{:?}", to_debug(v)))
[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: this value of type `ToDebug<impl Serialize>` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lib.rs:62:38
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn to_writer(v: impl Serialize, mut w: impl fmt::Write) -> fmt::Result {
[INFO] [stdout]    |                                     ----- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 62 |     w.write_fmt(format_args!("{:?}", to_debug(v)))
[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 `serde_fmt` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serde_fmt` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "5cc55099095650fe85ee2c909a2ba394ba4b3c7105441e2cfb0d498037cc1856", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cc55099095650fe85ee2c909a2ba394ba4b3c7105441e2cfb0d498037cc1856", kill_on_drop: false }`
[INFO] [stdout] 5cc55099095650fe85ee2c909a2ba394ba4b3c7105441e2cfb0d498037cc1856