[INFO] fetching crate alac 0.5.0...
[INFO] checking alac-0.5.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate alac 0.5.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate alac 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 alac 0.5.0
[INFO] finished tweaking crates.io crate alac 0.5.0
[INFO] tweaked toml for crates.io crate alac 0.5.0 written to /workspace/builds/worker-6-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 9 packages to latest compatible versions
[INFO] [stderr]       Adding mp4parse v0.10.1 (available: v0.17.0)
[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] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] b036f81e4d08a6ffe8b5b3d2e314b517512b4d1c80b4a3e6ecae51dab31ac6e4
[INFO] running `Command { std: "docker" "start" "-a" "b036f81e4d08a6ffe8b5b3d2e314b517512b4d1c80b4a3e6ecae51dab31ac6e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b036f81e4d08a6ffe8b5b3d2e314b517512b4d1c80b4a3e6ecae51dab31ac6e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b036f81e4d08a6ffe8b5b3d2e314b517512b4d1c80b4a3e6ecae51dab31ac6e4", kill_on_drop: false }`
[INFO] [stdout] b036f81e4d08a6ffe8b5b3d2e314b517512b4d1c80b4a3e6ecae51dab31ac6e4
[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] 2a3a989e9a51ee613064a3ebacf6e531b0dbf7d3a90973bffcfc7a9938acc3be
[INFO] running `Command { std: "docker" "start" "-a" "2a3a989e9a51ee613064a3ebacf6e531b0dbf7d3a90973bffcfc7a9938acc3be", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking log v0.4.22
[INFO] [stderr]     Checking hound v3.5.1
[INFO] [stderr]     Checking bitreader v0.3.8
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking mp4parse v0.10.1
[INFO] [stderr]     Checking alac v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader.rs:41:32
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&error::Error> {
[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] 41 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader.rs:41:32
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&error::Error> {
[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] 41 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this value of type `(Option<Result<S, hound::Error>>, Option<Result<S, ReadError>>)` has significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> tests/decode_comparison.rs:68:15
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut alac = alac.into_samples();
[INFO] [stdout]    |         -------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] 61 |
[INFO] [stdout] 62 |     let mut wav = hound::WavReader::open(wav)
[INFO] [stdout]    |         ------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 68 |         match (wav.next(), alac.next()) {
[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] warning: static `COMPARE_CAF_I16` is never used
[INFO] [stdout]   --> tests/decode_comparison.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | static COMPARE_CAF_I16: &'static [(&'static str, &'static str)] = &[
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `COMPARE_CAF_I32` is never used
[INFO] [stdout]   --> tests/decode_comparison.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | static COMPARE_CAF_I32: &'static [(&'static str, &'static str)] = &[
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `zero` is never used
[INFO] [stdout]   --> tests/decode_comparison.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | trait Sample
[INFO] [stdout]    |       ------ associated function in this trait
[INFO] [stdout] 83 |     : alac::Sample + hound::Sample + Clone + Copy + fmt::Display + PartialEq {
[INFO] [stdout] 84 |     fn zero() -> Self;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alac` (test "decode_comparison") due to 2 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "2a3a989e9a51ee613064a3ebacf6e531b0dbf7d3a90973bffcfc7a9938acc3be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a3a989e9a51ee613064a3ebacf6e531b0dbf7d3a90973bffcfc7a9938acc3be", kill_on_drop: false }`
[INFO] [stdout] 2a3a989e9a51ee613064a3ebacf6e531b0dbf7d3a90973bffcfc7a9938acc3be