[INFO] fetching crate mahler 0.20.0...
[INFO] building mahler-0.20.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate mahler 0.20.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate mahler 0.20.0
[INFO] finished tweaking crates.io crate mahler 0.20.0
[INFO] tweaked toml for crates.io crate mahler 0.20.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mahler 0.20.0 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mahler 0.20.0 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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3dd1ebf71a408935a93671efbe70e4c1bcdcd096b05ee5da6221696fe43d06be
[INFO] running `Command { std: "docker" "start" "-a" "3dd1ebf71a408935a93671efbe70e4c1bcdcd096b05ee5da6221696fe43d06be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dd1ebf71a408935a93671efbe70e4c1bcdcd096b05ee5da6221696fe43d06be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dd1ebf71a408935a93671efbe70e4c1bcdcd096b05ee5da6221696fe43d06be", kill_on_drop: false }`
[INFO] [stdout] 3dd1ebf71a408935a93671efbe70e4c1bcdcd096b05ee5da6221696fe43d06be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fb2e0dab562950116692a345c89ba921e7d83b9d793a4441919c382d0b6583f
[INFO] running `Command { std: "docker" "start" "-a" "5fb2e0dab562950116692a345c89ba921e7d83b9d793a4441919c382d0b6583f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling serde_json v1.0.143
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling thiserror v2.0.16
[INFO] [stderr]    Compiling anyhow v1.0.99
[INFO] [stderr]    Compiling matchit v0.8.6
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling thiserror-impl v2.0.16
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling tokio-util v0.7.16
[INFO] [stderr]    Compiling tokio-stream v0.1.17
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling jsonptr v0.7.1
[INFO] [stderr]    Compiling json-patch v4.0.0
[INFO] [stderr]    Compiling mahler v0.20.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.31s
[INFO] running `Command { std: "docker" "inspect" "5fb2e0dab562950116692a345c89ba921e7d83b9d793a4441919c382d0b6583f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb2e0dab562950116692a345c89ba921e7d83b9d793a4441919c382d0b6583f", kill_on_drop: false }`
[INFO] [stdout] 5fb2e0dab562950116692a345c89ba921e7d83b9d793a4441919c382d0b6583f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3c9717d057a611570c1a123618dd14eac5d6d9fcc4e742e6e5afa8a5bf3167a
[INFO] running `Command { std: "docker" "start" "-a" "c3c9717d057a611570c1a123618dd14eac5d6d9fcc4e742e6e5afa8a5bf3167a", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-syntax v0.8.6
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]    Compiling nu-ansi-term v0.50.1
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling thread_local v1.1.9
[INFO] [stderr]    Compiling async-stream-impl v0.3.6
[INFO] [stderr]    Compiling dedent v0.1.1
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling pretty_assertions v1.4.1
[INFO] [stderr]    Compiling async-stream v0.3.6
[INFO] [stderr]    Compiling regex-automata v0.4.10
[INFO] [stderr]    Compiling matchers v0.2.0
[INFO] [stderr]    Compiling tokio-util v0.7.16
[INFO] [stderr]    Compiling tracing-subscriber v0.3.20
[INFO] [stderr]    Compiling tokio-stream v0.1.17
[INFO] [stderr]    Compiling tokio-test v0.4.4
[INFO] [stderr]    Compiling mahler v0.20.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Counters` is never constructed
[INFO] [stdout]    --> src/planner/mod.rs:587:12
[INFO] [stdout]     |
[INFO] [stdout] 587 |     struct Counters(HashMap<String, i32>);
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 20.94s
[INFO] running `Command { std: "docker" "inspect" "c3c9717d057a611570c1a123618dd14eac5d6d9fcc4e742e6e5afa8a5bf3167a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3c9717d057a611570c1a123618dd14eac5d6d9fcc4e742e6e5afa8a5bf3167a", kill_on_drop: false }`
[INFO] [stdout] c3c9717d057a611570c1a123618dd14eac5d6d9fcc4e742e6e5afa8a5bf3167a