[INFO] fetching crate simple-test-bbarekas 0.1.3... [INFO] checking simple-test-bbarekas-0.1.3 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864 [INFO] extracting crate simple-test-bbarekas 0.1.3 into /workspace/builds/worker-6-tc2/source [INFO] validating manifest of crates.io crate simple-test-bbarekas 0.1.3 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 simple-test-bbarekas 0.1.3 [INFO] finished tweaking crates.io crate simple-test-bbarekas 0.1.3 [INFO] tweaked toml for crates.io crate simple-test-bbarekas 0.1.3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] crate crates.io crate simple-test-bbarekas 0.1.3 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" "+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] [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] b9f1fcd36fa55ab662120f2f8a8c14d4dcb7ff6bb2aecd7112c2a33113995557 [INFO] running `Command { std: "docker" "start" "-a" "b9f1fcd36fa55ab662120f2f8a8c14d4dcb7ff6bb2aecd7112c2a33113995557", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b9f1fcd36fa55ab662120f2f8a8c14d4dcb7ff6bb2aecd7112c2a33113995557", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b9f1fcd36fa55ab662120f2f8a8c14d4dcb7ff6bb2aecd7112c2a33113995557", kill_on_drop: false }` [INFO] [stdout] b9f1fcd36fa55ab662120f2f8a8c14d4dcb7ff6bb2aecd7112c2a33113995557 [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] 08397fe3f93d08b886c0c9c5f19aae7cda4466db0fc8d98402e700a9ad2a4459 [INFO] running `Command { std: "docker" "start" "-a" "08397fe3f93d08b886c0c9c5f19aae7cda4466db0fc8d98402e700a9ad2a4459", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021 [INFO] [stderr] Compiling libc v0.2.77 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling log v0.4.11 [INFO] [stderr] Compiling httparse v1.3.4 [INFO] [stderr] Checking thread_local v1.0.1 [INFO] [stderr] Checking itoa v0.4.6 [INFO] [stderr] Checking regex-syntax v0.6.18 [INFO] [stderr] Checking termcolor v1.1.0 [INFO] [stderr] Checking humantime v2.0.1 [INFO] [stderr] Checking scoped_threadpool v0.1.9 [INFO] [stderr] Checking aho-corasick v0.7.13 [INFO] [stderr] Checking iovec v0.1.4 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking time v0.1.44 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking regex v1.3.9 [INFO] [stderr] Checking http v0.1.21 [INFO] [stderr] Checking env_logger v0.8.1 [INFO] [stderr] Checking simple-test-bbarekas v0.1.3 (/opt/rustwide/workdir) [INFO] [stdout] error: this value of type `error::Error` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/request.rs:157:17 [INFO] [stdout] | [INFO] [stdout] 153 | let result = read(&mut s, Some(timeout)); [INFO] [stdout] | ------ [INFO] [stdout] | | [INFO] [stdout] | these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] | these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] | these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 157 | Err(e) => panic!("Expected timeout but got {:?}", e), [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/request.rs:122:25 [INFO] [stdout] | [INFO] [stdout] 122 | &buf[..min].copy_from_slice(&self.content[..min]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 122 | let _ = &buf[..min].copy_from_slice(&self.content[..min]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/request.rs:127:25 [INFO] [stdout] | [INFO] [stdout] 127 | / &buf[..min] [INFO] [stdout] 128 | | .copy_from_slice(&self.content[self.bytes_read..self.bytes_read + min]); [INFO] [stdout] | |___________________________________________________________________________________________________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 127 | let _ = &buf[..min] [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `simple-test-bbarekas` (lib test) due to 2 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "08397fe3f93d08b886c0c9c5f19aae7cda4466db0fc8d98402e700a9ad2a4459", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "08397fe3f93d08b886c0c9c5f19aae7cda4466db0fc8d98402e700a9ad2a4459", kill_on_drop: false }` [INFO] [stdout] 08397fe3f93d08b886c0c9c5f19aae7cda4466db0fc8d98402e700a9ad2a4459