[INFO] fetching crate twiggy-traits 0.8.0...
[INFO] building twiggy-traits-0.8.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate twiggy-traits 0.8.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate twiggy-traits 0.8.0
[INFO] finished tweaking crates.io crate twiggy-traits 0.8.0
[INFO] tweaked toml for crates.io crate twiggy-traits 0.8.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate twiggy-traits 0.8.0 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 twiggy-traits 0.8.0 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] [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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] f7700ad036d07eddd8900a2055941a0fd38c4f89f64619e9c2a22c53be058416
[INFO] running `Command { std: "docker" "start" "-a" "f7700ad036d07eddd8900a2055941a0fd38c4f89f64619e9c2a22c53be058416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7700ad036d07eddd8900a2055941a0fd38c4f89f64619e9c2a22c53be058416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7700ad036d07eddd8900a2055941a0fd38c4f89f64619e9c2a22c53be058416", kill_on_drop: false }`
[INFO] [stdout] f7700ad036d07eddd8900a2055941a0fd38c4f89f64619e9c2a22c53be058416
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] ae974daaa1d073670cd789b14d714b6457017f7fde48d6546f8c5b9d5637945a
[INFO] running `Command { std: "docker" "start" "-a" "ae974daaa1d073670cd789b14d714b6457017f7fde48d6546f8c5b9d5637945a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cpp_demangle v0.3.5
[INFO] [stderr]    Compiling anyhow v1.0.70
[INFO] [stderr]    Compiling fixedbitset v0.4.1
[INFO] [stderr]    Compiling frozen v1.0.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling ryu v1.0.10
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling wasmparser v0.80.2
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling csv v1.2.2
[INFO] [stderr]    Compiling petgraph v0.6.2
[INFO] [stderr]    Compiling regex v1.5.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling twiggy-ir v0.8.0
[INFO] [stderr]    Compiling twiggy-traits v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]    --> traits.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         items: &ir::Items,
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]    --> traits.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |         destination: &mut dyn io::Write,
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.94s
[INFO] running `Command { std: "docker" "inspect" "ae974daaa1d073670cd789b14d714b6457017f7fde48d6546f8c5b9d5637945a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae974daaa1d073670cd789b14d714b6457017f7fde48d6546f8c5b9d5637945a", kill_on_drop: false }`
[INFO] [stdout] ae974daaa1d073670cd789b14d714b6457017f7fde48d6546f8c5b9d5637945a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 5a7f74ac897cb2a69c029c7003c6a22cd3150ff7a69c01955294601f54b591f2
[INFO] running `Command { std: "docker" "start" "-a" "5a7f74ac897cb2a69c029c7003c6a22cd3150ff7a69c01955294601f54b591f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling twiggy-traits v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]    --> traits.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         items: &ir::Items,
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]    --> traits.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |         destination: &mut dyn io::Write,
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]    --> traits.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         items: &ir::Items,
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]    --> traits.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |         destination: &mut dyn io::Write,
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "5a7f74ac897cb2a69c029c7003c6a22cd3150ff7a69c01955294601f54b591f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a7f74ac897cb2a69c029c7003c6a22cd3150ff7a69c01955294601f54b591f2", kill_on_drop: false }`
[INFO] [stdout] 5a7f74ac897cb2a69c029c7003c6a22cd3150ff7a69c01955294601f54b591f2