[INFO] fetching crate ferrous-serialport 4.0.2... [INFO] building ferrous-serialport-4.0.2 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523 [INFO] extracting crate ferrous-serialport 4.0.2 into /workspace/builds/worker-6-tc1/source [INFO] validating manifest of crates.io crate ferrous-serialport 4.0.2 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate ferrous-serialport 4.0.2 [INFO] finished tweaking crates.io crate ferrous-serialport 4.0.2 [INFO] tweaked toml for crates.io crate ferrous-serialport 4.0.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] crate crates.io crate ferrous-serialport 4.0.2 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 35435e20684a6e8b917fc1391bbd86cdd1ea5e60ebdf48a34f87ada799ad4b27 [INFO] running `Command { std: "docker" "start" "-a" "35435e20684a6e8b917fc1391bbd86cdd1ea5e60ebdf48a34f87ada799ad4b27", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "35435e20684a6e8b917fc1391bbd86cdd1ea5e60ebdf48a34f87ada799ad4b27", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "35435e20684a6e8b917fc1391bbd86cdd1ea5e60ebdf48a34f87ada799ad4b27", kill_on_drop: false }` [INFO] [stdout] 35435e20684a6e8b917fc1391bbd86cdd1ea5e60ebdf48a34f87ada799ad4b27 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 80484c4c9554cfd27d8b80c6754058e615f4ac9a76e68eaf2504b1d205b7aee8 [INFO] running `Command { std: "docker" "start" "-a" "80484c4c9554cfd27d8b80c6754058e615f4ac9a76e68eaf2504b1d205b7aee8", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.94 [INFO] [stderr] Compiling pkg-config v0.3.19 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling nix v0.16.1 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling void v1.0.2 [INFO] [stderr] Compiling libudev-sys v0.1.4 [INFO] [stderr] Compiling libudev v0.2.0 [INFO] [stderr] Compiling ferrous-serialport v4.0.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: unexpected `cfg` condition value: `dragonflybsd` [INFO] [stdout] --> src/posix/termios.rs:62:5 [INFO] [stdout] | [INFO] [stdout] 62 | target_os = "dragonflybsd", [INFO] [stdout] | ^^^^^^^^^^^^-------------- [INFO] [stdout] | | [INFO] [stdout] | help: there is a expected value with a similar name: `"dragonfly"` [INFO] [stdout] | [INFO] [stdout] = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, and `vita` and 6 more [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] = note: `#[warn(unexpected_cfgs)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unexpected `cfg` condition value: `dragonflybsd` [INFO] [stdout] --> src/posix/termios.rs:108:5 [INFO] [stdout] | [INFO] [stdout] 108 | target_os = "dragonflybsd", [INFO] [stdout] | ^^^^^^^^^^^^-------------- [INFO] [stdout] | | [INFO] [stdout] | help: there is a expected value with a similar name: `"dragonfly"` [INFO] [stdout] | [INFO] [stdout] = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, and `vita` and 6 more [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unexpected `cfg` condition value: `dragonflybsd` [INFO] [stdout] --> src/posix/termios.rs:219:5 [INFO] [stdout] | [INFO] [stdout] 219 | target_os = "dragonflybsd", [INFO] [stdout] | ^^^^^^^^^^^^-------------- [INFO] [stdout] | | [INFO] [stdout] | help: there is a expected value with a similar name: `"dragonfly"` [INFO] [stdout] | [INFO] [stdout] = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, and `vita` and 6 more [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unexpected `cfg` condition value: `dragonflybsd` [INFO] [stdout] --> src/posix/termios.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | target_os = "dragonflybsd", [INFO] [stdout] | ^^^^^^^^^^^^-------------- [INFO] [stdout] | | [INFO] [stdout] | help: there is a expected value with a similar name: `"dragonfly"` [INFO] [stdout] | [INFO] [stdout] = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, and `vita` and 6 more [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unexpected `cfg` condition value: `dragonflybsd` [INFO] [stdout] --> src/posix/tty.rs:445:9 [INFO] [stdout] | [INFO] [stdout] 445 | target_os = "dragonflybsd", [INFO] [stdout] | ^^^^^^^^^^^^-------------- [INFO] [stdout] | | [INFO] [stdout] | help: there is a expected value with a similar name: `"dragonfly"` [INFO] [stdout] | [INFO] [stdout] = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, and `vita` and 6 more [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unexpected `cfg` condition value: `dragonflybsd` [INFO] [stdout] --> src/posix/tty.rs:588:9 [INFO] [stdout] | [INFO] [stdout] 588 | target_os = "dragonflybsd", [INFO] [stdout] | ^^^^^^^^^^^^-------------- [INFO] [stdout] | | [INFO] [stdout] | help: there is a expected value with a similar name: `"dragonfly"` [INFO] [stdout] | [INFO] [stdout] = note: expected values for `target_os` are: `aix`, `android`, `cuda`, `dragonfly`, `emscripten`, `espidf`, `freebsd`, `fuchsia`, `haiku`, `hermit`, `horizon`, `hurd`, `illumos`, `ios`, `l4re`, `linux`, `macos`, `netbsd`, `none`, `nto`, `nuttx`, `openbsd`, `psp`, `psx`, `redox`, `rtems`, `solaris`, `solid_asp3`, `teeos`, `trusty`, `tvos`, `uefi`, `unknown`, `visionos`, and `vita` and 6 more [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: relative drop order changing in Rust 2024 [INFO] [stdout] --> src/posix/enumerate.rs:347:38 [INFO] [stdout] | [INFO] [stdout] 346 | for d in devices { [INFO] [stdout] | - ------- [INFO] [stdout] | | | [INFO] [stdout] | | this value will be stored in a temporary; let us call it `#1` [INFO] [stdout] | | `#1` will be dropped later as of Edition 2024 [INFO] [stdout] | `d` calls a custom destructor [INFO] [stdout] | `d` will be dropped later as of Edition 2024 [INFO] [stdout] 347 | if let Some(p) = d.parent() { [INFO] [stdout] | - ^^^^^^^^^^ [INFO] [stdout] | | | [INFO] [stdout] | | this value will be stored in a temporary; let us call it `#3` [INFO] [stdout] | | up until Edition 2021 `#3` is dropped last but will be dropped earlier in Edition 2024 [INFO] [stdout] | `p` calls a custom destructor [INFO] [stdout] | `p` will be dropped later as of Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 351 | if driver == "serial8250" && crate::new(path, 9600).open().is_err() { [INFO] [stdout] | ----------------------------- [INFO] [stdout] | | [INFO] [stdout] | this value will be stored in a temporary; let us call it `#2` [INFO] [stdout] | `#2` will be dropped later as of Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 366 | } [INFO] [stdout] | - now the temporary value is dropped here, before the local variables in the block or statement [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see [INFO] [stdout] note: `#3` invokes this custom destructor [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/libudev-0.2.0/src/device.rs:25:1 [INFO] [stdout] | [INFO] [stdout] 25 | impl<'a> Drop for Device<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] note: `#1` invokes this custom destructor [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/libudev-0.2.0/src/device.rs:25:1 [INFO] [stdout] | [INFO] [stdout] 25 | impl<'a> Drop for Device<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] note: `d` invokes this custom destructor [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/libudev-0.2.0/src/device.rs:25:1 [INFO] [stdout] | [INFO] [stdout] 25 | impl<'a> Drop for Device<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] note: `p` invokes this custom destructor [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/libudev-0.2.0/src/device.rs:25:1 [INFO] [stdout] | [INFO] [stdout] 25 | impl<'a> Drop for Device<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] = note: `#2` may invoke a custom destructor because it contains a trait object [INFO] [stdout] = note: most of the time, changing drop order is harmless; inspect the `impl Drop`s for side effects like releasing locks or sending messages [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `ferrous-serialport` (lib) due to 1 previous error; 6 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "80484c4c9554cfd27d8b80c6754058e615f4ac9a76e68eaf2504b1d205b7aee8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "80484c4c9554cfd27d8b80c6754058e615f4ac9a76e68eaf2504b1d205b7aee8", kill_on_drop: false }` [INFO] [stdout] 80484c4c9554cfd27d8b80c6754058e615f4ac9a76e68eaf2504b1d205b7aee8