[INFO] cloning repository https://github.com/ljt019/candle_mnist_cnn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ljt019/candle_mnist_cnn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fljt019%2Fcandle_mnist_cnn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fljt019%2Fcandle_mnist_cnn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b453a59b0ebadcbda528895559b3b66e7b396380
[INFO] building ljt019/candle_mnist_cnn against master#44f415c1d617ebc7b931a243b7b321ef8a6ca47c for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fljt019%2Fcandle_mnist_cnn" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ljt019/candle_mnist_cnn on toolchain 44f415c1d617ebc7b931a243b7b321ef8a6ca47c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ljt019/candle_mnist_cnn
[INFO] finished tweaking git repo https://github.com/ljt019/candle_mnist_cnn
[INFO] tweaked toml for git repo https://github.com/ljt019/candle_mnist_cnn written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ljt019/candle_mnist_cnn 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" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stdout] warning: method `train` is never used
[INFO] [stdout]   --> src/model.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl ConvNet {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     pub fn train(
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrainingArgs` is never constructed
[INFO] [stdout]    --> src/model.rs:208:12
[INFO] [stdout]     |
[INFO] [stdout] 208 | pub struct TrainingArgs {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] running `Command { std: "docker" "rm" "-f" "d5b4a66ce1a5a907f9421b9cbf0a2e65ec8af5760df2856aaa421f88a7592925", kill_on_drop: false }`
[INFO] [stdout] d5b4a66ce1a5a907f9421b9cbf0a2e65ec8af5760df2856aaa421f88a7592925
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8d17e66ea4e773efe7e5e7cdd122277bc6c751dc494a9bba3524d2e5dbb3a6b
[INFO] running `Command { std: "docker" "start" "-a" "c8d17e66ea4e773efe7e5e7cdd122277bc6c751dc494a9bba3524d2e5dbb3a6b", kill_on_drop: false }`
[INFO] [stderr]    Compiling temp_ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `train` is never used
[INFO] [stdout]   --> src/model.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl ConvNet {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     pub fn train(
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrainingArgs` is never constructed
[INFO] [stdout]    --> src/model.rs:208:12
[INFO] [stdout]     |
[INFO] [stdout] 208 | pub struct TrainingArgs {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 9.53s
[INFO] running `Command { std: "docker" "inspect" "c8d17e66ea4e773efe7e5e7cdd122277bc6c751dc494a9bba3524d2e5dbb3a6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8d17e66ea4e773efe7e5e7cdd122277bc6c751dc494a9bba3524d2e5dbb3a6b", kill_on_drop: false }`
[INFO] [stdout] c8d17e66ea4e773efe7e5e7cdd122277bc6c751dc494a9bba3524d2e5dbb3a6b