[INFO] cloning repository https://github.com/faassen/flatten-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/faassen/flatten-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffaassen%2Fflatten-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffaassen%2Fflatten-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 48a86095233d6c5eb90c73051fbe41a4ffa3ea22
[INFO] checking faassen/flatten-rust against master#f8463896a9b36a04899c013bd8825a7fd29dd7a4 for pr-151920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffaassen%2Fflatten-rust" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/faassen/flatten-rust
[INFO] finished tweaking git repo https://github.com/faassen/flatten-rust
[INFO] tweaked toml for git repo https://github.com/faassen/flatten-rust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/faassen/flatten-rust on toolchain f8463896a9b36a04899c013bd8825a7fd29dd7a4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f8463896a9b36a04899c013bd8825a7fd29dd7a4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/faassen/flatten-rust 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" "+f8463896a9b36a04899c013bd8825a7fd29dd7a4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded condtype v1.3.0
[INFO] [stderr]   Downloaded divan-macros v0.1.17
[INFO] [stderr]   Downloaded divan v0.1.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+f8463896a9b36a04899c013bd8825a7fd29dd7a4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] abf81443bdcd0bf21aee00ae9e7c4a77cfe7ed3cf364bb9c9952d39a956a8cec
[INFO] running `Command { std: "docker" "start" "-a" "abf81443bdcd0bf21aee00ae9e7c4a77cfe7ed3cf364bb9c9952d39a956a8cec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abf81443bdcd0bf21aee00ae9e7c4a77cfe7ed3cf364bb9c9952d39a956a8cec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abf81443bdcd0bf21aee00ae9e7c4a77cfe7ed3cf364bb9c9952d39a956a8cec", kill_on_drop: false }`
[INFO] [stdout] abf81443bdcd0bf21aee00ae9e7c4a77cfe7ed3cf364bb9c9952d39a956a8cec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+f8463896a9b36a04899c013bd8825a7fd29dd7a4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 272efe143721a3c461321379f84e4277bc2d55048359af8004c3e69847cfd925
[INFO] running `Command { std: "docker" "start" "-a" "272efe143721a3c461321379f84e4277bc2d55048359af8004c3e69847cfd925", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.168
[INFO] [stderr]    Compiling rustix v0.38.42
[INFO] [stderr]     Checking linux-raw-sys v0.4.14
[INFO] [stderr]     Checking regex-lite v0.1.6
[INFO] [stderr]     Checking condtype v1.3.0
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking terminal_size v0.4.1
[INFO] [stderr]     Checking clap_builder v4.5.23
[INFO] [stderr]     Checking clap v4.5.23
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling divan-macros v0.1.17
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking divan v0.1.17
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking flatten-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `black_box`
[INFO] [stdout]  --> benches/flatten.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use divan::{black_box, Bencher};
[INFO] [stdout]   |             ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.07s
[INFO] running `Command { std: "docker" "inspect" "272efe143721a3c461321379f84e4277bc2d55048359af8004c3e69847cfd925", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "272efe143721a3c461321379f84e4277bc2d55048359af8004c3e69847cfd925", kill_on_drop: false }`
[INFO] [stdout] 272efe143721a3c461321379f84e4277bc2d55048359af8004c3e69847cfd925