[INFO] fetching crate regalloc 0.0.31...
[INFO] checking regalloc-0.0.31 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate regalloc 0.0.31 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate regalloc 0.0.31 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate regalloc 0.0.31
[INFO] finished tweaking crates.io crate regalloc 0.0.31
[INFO] tweaked toml for crates.io crate regalloc 0.0.31 written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4a1e5c75c190cfc241a0be6729780a6e7854c9d045511af28c59917f0222b85
[INFO] running `Command { std: "docker" "start" "-a" "e4a1e5c75c190cfc241a0be6729780a6e7854c9d045511af28c59917f0222b85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4a1e5c75c190cfc241a0be6729780a6e7854c9d045511af28c59917f0222b85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4a1e5c75c190cfc241a0be6729780a6e7854c9d045511af28c59917f0222b85", kill_on_drop: false }`
[INFO] [stdout] e4a1e5c75c190cfc241a0be6729780a6e7854c9d045511af28c59917f0222b85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f0b80c115c46fc4f916322f7e7554cbb575a95a82dd38dbdc6189b107038def
[INFO] running `Command { std: "docker" "start" "-a" "1f0b80c115c46fc4f916322f7e7554cbb575a95a82dd38dbdc6189b107038def", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking regalloc v0.0.31 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `vreg`
[INFO] [stdout]   --> src/snapshot.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Spill { vreg: Option<VirtualReg> },
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vreg`
[INFO] [stdout]   --> src/snapshot.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Reload { vreg: Option<VirtualReg> },
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vreg`
[INFO] [stdout]   --> src/snapshot.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Move { vreg: VirtualReg },
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vreg`
[INFO] [stdout]   --> src/snapshot.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Spill { vreg: Option<VirtualReg> },
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vreg`
[INFO] [stdout]   --> src/snapshot.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Reload { vreg: Option<VirtualReg> },
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `vreg`
[INFO] [stdout]   --> src/snapshot.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Move { vreg: VirtualReg },
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.81s
[INFO] running `Command { std: "docker" "inspect" "1f0b80c115c46fc4f916322f7e7554cbb575a95a82dd38dbdc6189b107038def", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f0b80c115c46fc4f916322f7e7554cbb575a95a82dd38dbdc6189b107038def", kill_on_drop: false }`
[INFO] [stdout] 1f0b80c115c46fc4f916322f7e7554cbb575a95a82dd38dbdc6189b107038def