[INFO] fetching crate capnp 0.20.3... [INFO] building capnp-0.20.3 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523 [INFO] extracting crate capnp 0.20.3 into /workspace/builds/worker-6-tc1/source [INFO] validating manifest of crates.io crate capnp 0.20.3 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 capnp 0.20.3 [INFO] removed 0 missing tests [INFO] finished tweaking crates.io crate capnp 0.20.3 [INFO] tweaked toml for crates.io crate capnp 0.20.3 written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Locking 15 packages to latest compatible versions [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] [stderr] Blocking waiting for file lock on package cache [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] 6869b94aed0be04ccbba70019f57c800260de35f8d7ae19a15a7a2b1cbad7e9f [INFO] running `Command { std: "docker" "start" "-a" "6869b94aed0be04ccbba70019f57c800260de35f8d7ae19a15a7a2b1cbad7e9f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6869b94aed0be04ccbba70019f57c800260de35f8d7ae19a15a7a2b1cbad7e9f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6869b94aed0be04ccbba70019f57c800260de35f8d7ae19a15a7a2b1cbad7e9f", kill_on_drop: false }` [INFO] [stdout] 6869b94aed0be04ccbba70019f57c800260de35f8d7ae19a15a7a2b1cbad7e9f [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] 7415ed84570a262604e9e19e31da06d29b7dc7cb01703cb6d2eb907737295f1a [INFO] running `Command { std: "docker" "start" "-a" "7415ed84570a262604e9e19e31da06d29b7dc7cb01703cb6d2eb907737295f1a", kill_on_drop: false }` [INFO] [stderr] Compiling capnp v0.20.3 (/opt/rustwide/workdir) [INFO] [stdout] error: relative drop order changing in Rust 2024 [INFO] [stdout] --> src/capability.rs:420:32 [INFO] [stdout] | [INFO] [stdout] 418 | let mut hook = cap.into_client_hook(); [INFO] [stdout] | -------- [INFO] [stdout] | | [INFO] [stdout] | `hook` calls a custom destructor [INFO] [stdout] | `hook` will be dropped later as of Edition 2024 [INFO] [stdout] 419 | let _ = hook.when_resolved().await; [INFO] [stdout] 420 | while let Some(resolved) = hook.get_resolved() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this value will be stored in a temporary; let us call it `#1` [INFO] [stdout] | up until Edition 2021 `#1` is dropped last but will be dropped earlier in Edition 2024 [INFO] [stdout] 421 | hook = resolved; [INFO] [stdout] 422 | } [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: `#1` may invoke a custom destructor because it contains a trait object [INFO] [stdout] = note: `hook` 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] [stdout] warning: function pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique [INFO] [stdout] --> src/introspect.rs:275:55 [INFO] [stdout] | [INFO] [stdout] 275 | core::ptr::eq(self.generic, other.generic) && self.field_types == other.field_types [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: the address of the same function can vary between different codegen units [INFO] [stdout] = note: furthermore, different functions could have the same address after being merged together [INFO] [stdout] = note: for more information visit [INFO] [stdout] = note: `#[warn(unpredictable_function_pointer_comparisons)]` on by default [INFO] [stdout] help: refactor your code, or use `std::ptr::fn_addr_eq` to suppress the lint [INFO] [stdout] | [INFO] [stdout] 275 | core::ptr::eq(self.generic, other.generic) && std::ptr::fn_addr_eq(self.field_types, other.field_types) [INFO] [stdout] | +++++++++++++++++++++ ~ + [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `capnp` (lib) due to 1 previous error; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "7415ed84570a262604e9e19e31da06d29b7dc7cb01703cb6d2eb907737295f1a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7415ed84570a262604e9e19e31da06d29b7dc7cb01703cb6d2eb907737295f1a", kill_on_drop: false }` [INFO] [stdout] 7415ed84570a262604e9e19e31da06d29b7dc7cb01703cb6d2eb907737295f1a