[INFO] fetching crate rhizome 0.0.1... [INFO] building rhizome-0.0.1 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523 [INFO] extracting crate rhizome 0.0.1 into /workspace/builds/worker-5-tc1/source [INFO] validating manifest of crates.io crate rhizome 0.0.1 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 rhizome 0.0.1 [INFO] finished tweaking crates.io crate rhizome 0.0.1 [INFO] tweaked toml for crates.io crate rhizome 0.0.1 written to /workspace/builds/worker-5-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] Updating crates.io index [INFO] [stderr] Locking 65 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] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded rhizome_proc-macro-definitions v0.0.1 [INFO] [stderr] Downloaded mapped-guard v0.0.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 4445f3f9f0fd82e28ac6acf6966459fcb40a7cc781ef49a93e7e1cad91d89d50 [INFO] running `Command { std: "docker" "start" "-a" "4445f3f9f0fd82e28ac6acf6966459fcb40a7cc781ef49a93e7e1cad91d89d50", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4445f3f9f0fd82e28ac6acf6966459fcb40a7cc781ef49a93e7e1cad91d89d50", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4445f3f9f0fd82e28ac6acf6966459fcb40a7cc781ef49a93e7e1cad91d89d50", kill_on_drop: false }` [INFO] [stdout] 4445f3f9f0fd82e28ac6acf6966459fcb40a7cc781ef49a93e7e1cad91d89d50 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 4498cc1a85a233d3608d31b9ceae97c75a32aa9d429b04e683fa2a81d354bff4 [INFO] running `Command { std: "docker" "start" "-a" "4498cc1a85a233d3608d31b9ceae97c75a32aa9d429b04e683fa2a81d354bff4", kill_on_drop: false }` [INFO] [stderr] Compiling mapped-guard v0.0.1 [INFO] [stderr] Compiling rhizome v0.0.1 (/opt/rustwide/workdir) [INFO] [stdout] error: relative drop order changing in Rust 2024 [INFO] [stdout] --> src/lib.rs:117:26 [INFO] [stdout] | [INFO] [stdout] 117 | if let Some(guard) = current [INFO] [stdout] | ______________________________________^ [INFO] [stdout] 118 | | .local_scope [INFO] [stdout] 119 | | .read() [INFO] [stdout] 120 | | .unwrap() [INFO] [stdout] 121 | | .maybe_map_guard(|local_scope| local_scope.get(&key)) [INFO] [stdout] | | ^ [INFO] [stdout] | | | [INFO] [stdout] | |_________________________________________________________________________this value will be stored in a temporary; let us call it `#2` [INFO] [stdout] | up until Edition 2021 `#2` is dropped last but will be dropped earlier in Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 125 | } [INFO] [stdout] | - now the temporary value is dropped here, before the local variables in the block or statement [INFO] [stdout] ... [INFO] [stdout] 148 | (At(Root, factory), None) => insert(current, key.clone(), *factory)?, [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] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see [INFO] [stdout] note: `#2` invokes this custom destructor [INFO] [stdout] --> /rustc/11663cd3bfefef7d34e8f0892c250bf698049392/library/std/src/sync/rwlock.rs:818:1 [INFO] [stdout] = note: `#1` 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 `rhizome` (lib) due to 1 previous error [INFO] running `Command { std: "docker" "inspect" "4498cc1a85a233d3608d31b9ceae97c75a32aa9d429b04e683fa2a81d354bff4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4498cc1a85a233d3608d31b9ceae97c75a32aa9d429b04e683fa2a81d354bff4", kill_on_drop: false }` [INFO] [stdout] 4498cc1a85a233d3608d31b9ceae97c75a32aa9d429b04e683fa2a81d354bff4