[INFO] fetching crate hpart 0.1.1...
[INFO] testing hpart-0.1.1 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate hpart 0.1.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate hpart 0.1.1
[INFO] finished tweaking crates.io crate hpart 0.1.1
[INFO] tweaked toml for crates.io crate hpart 0.1.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate hpart 0.1.1 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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 28 packages to latest compatible versions
[INFO] [stderr]       Adding ordered-float v4.6.0 (available: v5.1.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40981051705b621e8b0f6537563ce80452aff22a9c10d359b5a84805c3420a3e
[INFO] running `Command { std: "docker" "start" "-a" "40981051705b621e8b0f6537563ce80452aff22a9c10d359b5a84805c3420a3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40981051705b621e8b0f6537563ce80452aff22a9c10d359b5a84805c3420a3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40981051705b621e8b0f6537563ce80452aff22a9c10d359b5a84805c3420a3e", kill_on_drop: false }`
[INFO] [stdout] 40981051705b621e8b0f6537563ce80452aff22a9c10d359b5a84805c3420a3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a8c47c898897251939ede534a4c295970349d9c75b6669797613e8d6a90aecf
[INFO] running `Command { std: "docker" "start" "-a" "4a8c47c898897251939ede534a4c295970349d9c75b6669797613e8d6a90aecf", kill_on_drop: false }`
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling funty v2.0.0
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling ordered-float v4.6.0
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling wyz v0.5.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling bitvec v1.0.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling hpart v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/coarsen.rs:29:11
[INFO] [stdout]    |
[INFO] [stdout] 29 |     while let Some((_, (u, v))) = pq.pop()
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::prelude::*`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bitvec::prelude`
[INFO] [stdout]  --> src/uncoarsen.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bitvec::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hpart` (lib) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "4a8c47c898897251939ede534a4c295970349d9c75b6669797613e8d6a90aecf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a8c47c898897251939ede534a4c295970349d9c75b6669797613e8d6a90aecf", kill_on_drop: false }`
[INFO] [stdout] 4a8c47c898897251939ede534a4c295970349d9c75b6669797613e8d6a90aecf