[INFO] fetching crate auto-diff-data-pipe 0.5.9...
[INFO] checking auto-diff-data-pipe-0.5.9 against try#51ad93974f526eaf4ede64932870490e6c96e4fd for pr-103293
[INFO] extracting crate auto-diff-data-pipe 0.5.9 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate auto-diff-data-pipe 0.5.9 on toolchain 51ad93974f526eaf4ede64932870490e6c96e4fd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+51ad93974f526eaf4ede64932870490e6c96e4fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate auto-diff-data-pipe 0.5.9
[INFO] finished tweaking crates.io crate auto-diff-data-pipe 0.5.9
[INFO] tweaked toml for crates.io crate auto-diff-data-pipe 0.5.9 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+51ad93974f526eaf4ede64932870490e6c96e4fd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+51ad93974f526eaf4ede64932870490e6c96e4fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:83125433e4fff17b1ac56874832f668d9df75ee638575aca552b68e127bedee9" "/opt/rustwide/cargo-home/bin/cargo" "+51ad93974f526eaf4ede64932870490e6c96e4fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3902a9f7f6b999667dc30b0564cf6cebe5a5c52c81c2b87717f1ec00ad2cd32c
[INFO] running `Command { std: "docker" "start" "-a" "3902a9f7f6b999667dc30b0564cf6cebe5a5c52c81c2b87717f1ec00ad2cd32c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3902a9f7f6b999667dc30b0564cf6cebe5a5c52c81c2b87717f1ec00ad2cd32c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3902a9f7f6b999667dc30b0564cf6cebe5a5c52c81c2b87717f1ec00ad2cd32c", kill_on_drop: false }`
[INFO] [stdout] 3902a9f7f6b999667dc30b0564cf6cebe5a5c52c81c2b87717f1ec00ad2cd32c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:83125433e4fff17b1ac56874832f668d9df75ee638575aca552b68e127bedee9" "/opt/rustwide/cargo-home/bin/cargo" "+51ad93974f526eaf4ede64932870490e6c96e4fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1870ec5a073dacddd05ac47be9aef6a7878e02b8a5c6b8d1d0a9217f3dbbbeb3
[INFO] running `Command { std: "docker" "start" "-a" "1870ec5a073dacddd05ac47be9aef6a7878e02b8a5c6b8d1d0a9217f3dbbbeb3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libm v0.2.5
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]     Checking lapack-src v0.8.0
[INFO] [stderr]     Checking blas-src v0.8.0
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling dirs v3.0.2
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking blas-sys v0.7.1
[INFO] [stderr]     Checking lapack-sys v0.14.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking lapack v0.19.0
[INFO] [stderr]     Checking blas v0.22.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.37
[INFO] [stderr]    Compiling auto-diff-macros v0.5.9
[INFO] [stderr]    Compiling openblas-build v0.10.5
[INFO] [stderr]    Compiling openblas-src v0.10.5
[INFO] [stderr]     Checking tensor-rs v0.5.9
[INFO] [stderr]     Checking auto-diff v0.5.9
[INFO] [stderr]     Checking auto-diff-data-pipe v0.5.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `l0`
[INFO] [stdout]    --> src/dataloader/mnist.rs:170:11
[INFO] [stdout]     |
[INFO] [stdout] 170 |     let (t0, l0) = mnist.get_item(0, Some(DataSlice::Test)).unwrap();
[INFO] [stdout]     |              ^^ help: if this is intentional, prefix it with an underscore: `_l0`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 11s
[INFO] running `Command { std: "docker" "inspect" "1870ec5a073dacddd05ac47be9aef6a7878e02b8a5c6b8d1d0a9217f3dbbbeb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1870ec5a073dacddd05ac47be9aef6a7878e02b8a5c6b8d1d0a9217f3dbbbeb3", kill_on_drop: false }`
[INFO] [stdout] 1870ec5a073dacddd05ac47be9aef6a7878e02b8a5c6b8d1d0a9217f3dbbbeb3