[INFO] fetching crate sacrifice 0.3.0-alpha.3...
[INFO] checking sacrifice-0.3.0-alpha.3 against try#0edd13c68435d50367c79cef43ac2768d2ec4f3d for pr-129422
[INFO] extracting crate sacrifice 0.3.0-alpha.3 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate sacrifice 0.3.0-alpha.3 on toolchain 0edd13c68435d50367c79cef43ac2768d2ec4f3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sacrifice 0.3.0-alpha.3
[INFO] finished tweaking crates.io crate sacrifice 0.3.0-alpha.3
[INFO] tweaked toml for crates.io crate sacrifice 0.3.0-alpha.3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate sacrifice 0.3.0-alpha.3 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" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a4187e7699a33c6c0053328da09a3fec94f1034523680d539026f2952087eef
[INFO] running `Command { std: "docker" "start" "-a" "9a4187e7699a33c6c0053328da09a3fec94f1034523680d539026f2952087eef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a4187e7699a33c6c0053328da09a3fec94f1034523680d539026f2952087eef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a4187e7699a33c6c0053328da09a3fec94f1034523680d539026f2952087eef", kill_on_drop: false }`
[INFO] [stdout] 9a4187e7699a33c6c0053328da09a3fec94f1034523680d539026f2952087eef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac342a5dd1ea7618fdb59102e63e681b358e80d4a1f527f431606b5ec2e1dea2
[INFO] running `Command { std: "docker" "start" "-a" "ac342a5dd1ea7618fdb59102e63e681b358e80d4a1f527f431606b5ec2e1dea2", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking circular v0.3.0
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking btoi v0.4.3
[INFO] [stderr]     Checking shakmaty v0.26.0
[INFO] [stderr]     Checking pgn-reader v0.25.0
[INFO] [stderr]     Checking sacrifice v0.3.0-alpha.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `new_node`
[INFO] [stdout]   --> src/bin/example.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let new_node = root.new_variation(queens_pawn); // 1. d4 node
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/example.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut game = sacrifice::read_pgn(
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_node`
[INFO] [stdout]   --> src/bin/example.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let new_node = root.new_variation(queens_pawn); // 1. d4 node
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/example.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut game = sacrifice::read_pgn(
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.06s
[INFO] running `Command { std: "docker" "inspect" "ac342a5dd1ea7618fdb59102e63e681b358e80d4a1f527f431606b5ec2e1dea2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac342a5dd1ea7618fdb59102e63e681b358e80d4a1f527f431606b5ec2e1dea2", kill_on_drop: false }`
[INFO] [stdout] ac342a5dd1ea7618fdb59102e63e681b358e80d4a1f527f431606b5ec2e1dea2