[INFO] cloning repository https://github.com/xd009642/mdbook-chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xd009642/mdbook-chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxd009642%2Fmdbook-chess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxd009642%2Fmdbook-chess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 48ddf12324d5c5feaa7ff1378bf10626d21def68
[INFO] building xd009642/mdbook-chess against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxd009642%2Fmdbook-chess" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xd009642/mdbook-chess on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xd009642/mdbook-chess
[INFO] finished tweaking git repo https://github.com/xd009642/mdbook-chess
[INFO] tweaked toml for git repo https://github.com/xd009642/mdbook-chess written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/xd009642/mdbook-chess 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" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e165cdfbfb32e7d7725e51629305a0b05071e35ba6917bdd3049985fcc8851be
[INFO] running `Command { std: "docker" "start" "-a" "e165cdfbfb32e7d7725e51629305a0b05071e35ba6917bdd3049985fcc8851be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e165cdfbfb32e7d7725e51629305a0b05071e35ba6917bdd3049985fcc8851be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e165cdfbfb32e7d7725e51629305a0b05071e35ba6917bdd3049985fcc8851be", kill_on_drop: false }`
[INFO] [stdout] e165cdfbfb32e7d7725e51629305a0b05071e35ba6917bdd3049985fcc8851be
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f648b5b23cc806d0604d5724dfdb174f7e76e77a1d1c9e10763252e92e62f40
[INFO] running `Command { std: "docker" "start" "-a" "7f648b5b23cc806d0604d5724dfdb174f7e76e77a1d1c9e10763252e92e62f40", kill_on_drop: false }`
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[INFO] [stderr]    Compiling pest_meta v2.7.1
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[INFO] [stderr]    Compiling topological-sort v0.2.2
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[INFO] [stderr]    Compiling clap v3.2.25
[INFO] [stderr]    Compiling tracing-subscriber v0.3.17
[INFO] [stderr]    Compiling pulldown-cmark-to-cmark v10.0.4
[INFO] [stderr]    Compiling tokio-util v0.7.8
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[INFO] [stderr]    Compiling pest_generator v2.7.1
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[INFO] [stderr]    Compiling pest_derive v2.7.1
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[INFO] [stderr]    Compiling serde_spanned v0.6.3
[INFO] [stderr]    Compiling toml_datetime v0.6.3
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling serde_yaml v0.9.24
[INFO] [stderr]    Compiling toml_edit v0.19.14
[INFO] [stderr]    Compiling elasticlunr-rs v3.0.2
[INFO] [stderr]    Compiling handlebars v4.3.7
[INFO] [stderr]    Compiling ammonia v3.3.0
[INFO] [stderr]    Compiling hyper v0.14.27
[INFO] [stderr]    Compiling toml v0.7.6
[INFO] [stderr]    Compiling warp v0.3.5
[INFO] [stderr]    Compiling mdbook v0.4.32
[INFO] [stderr]    Compiling mdbook-chess v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `trace`
[INFO] [stdout]  --> src/main.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tracing::{info, trace, warn};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 53s
[INFO] running `Command { std: "docker" "inspect" "7f648b5b23cc806d0604d5724dfdb174f7e76e77a1d1c9e10763252e92e62f40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f648b5b23cc806d0604d5724dfdb174f7e76e77a1d1c9e10763252e92e62f40", kill_on_drop: false }`
[INFO] [stdout] 7f648b5b23cc806d0604d5724dfdb174f7e76e77a1d1c9e10763252e92e62f40
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88770815eae440fe2e3252c8350d26ab21b0278a0006a7cdc17f33b83b031996
[INFO] running `Command { std: "docker" "start" "-a" "88770815eae440fe2e3252c8350d26ab21b0278a0006a7cdc17f33b83b031996", kill_on_drop: false }`
[INFO] [stderr]    Compiling mdbook-chess v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `trace`
[INFO] [stdout]  --> src/main.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tracing::{info, trace, warn};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `Command { std: "docker" "inspect" "88770815eae440fe2e3252c8350d26ab21b0278a0006a7cdc17f33b83b031996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88770815eae440fe2e3252c8350d26ab21b0278a0006a7cdc17f33b83b031996", kill_on_drop: false }`
[INFO] [stdout] 88770815eae440fe2e3252c8350d26ab21b0278a0006a7cdc17f33b83b031996