[INFO] fetching crate tsuga 0.1.1...
[INFO] checking tsuga-0.1.1 against try#961316100510fe780d266d35bcf68702fbb049e5 for pr-78935-1
[INFO] extracting crate tsuga 0.1.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate tsuga 0.1.1 on toolchain 961316100510fe780d266d35bcf68702fbb049e5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+961316100510fe780d266d35bcf68702fbb049e5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tsuga 0.1.1
[INFO] finished tweaking crates.io crate tsuga 0.1.1
[INFO] tweaked toml for crates.io crate tsuga 0.1.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate tsuga 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+961316100510fe780d266d35bcf68702fbb049e5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mnist v0.4.1
[INFO] [stderr]   Downloaded ndarray-rand v0.11.0
[INFO] [stderr]   Downloaded serial_test v0.4.0
[INFO] [stderr]   Downloaded rulinalg v0.4.2
[INFO] [stderr]   Downloaded imageproc v0.20.0
[INFO] [stderr]   Downloaded cifar-ten v0.1.0
[INFO] [stderr]   Downloaded serial_test_derive v0.4.0
[INFO] [stderr]   Downloaded ndarray-stats v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+961316100510fe780d266d35bcf68702fbb049e5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9e34ca964bcbd7ba756c451807e97704414ea1d8cfc75ff94bd7d0019d2a782
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b9e34ca964bcbd7ba756c451807e97704414ea1d8cfc75ff94bd7d0019d2a782", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9e34ca964bcbd7ba756c451807e97704414ea1d8cfc75ff94bd7d0019d2a782", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9e34ca964bcbd7ba756c451807e97704414ea1d8cfc75ff94bd7d0019d2a782", kill_on_drop: false }`
[INFO] [stdout] b9e34ca964bcbd7ba756c451807e97704414ea1d8cfc75ff94bd7d0019d2a782
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+961316100510fe780d266d35bcf68702fbb049e5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2976a5e52277d9396d86187babc279f5194e62be7ce694155d9a52891ad1ded9
[INFO] running `Command { std: "docker" "start" "-a" "2976a5e52277d9396d86187babc279f5194e62be7ce694155d9a52891ad1ded9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
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[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling xml-rs v0.8.3
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[INFO] [stderr]    Compiling ndarray v0.13.1
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[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling serde v1.0.116
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[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking bytemuck v1.4.1
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking number_prefix v0.3.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.3.0
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[INFO] [stderr]    Compiling wayland-sys v0.27.0
[INFO] [stderr]    Compiling nom v5.1.2
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[INFO] [stderr]     Checking num v0.1.42
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[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking image v0.23.9
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling serial_test_derive v0.4.0
[INFO] [stderr]     Checking wayland-commons v0.27.0
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking serial_test v0.4.0
[INFO] [stderr]     Checking ndarray-rand v0.11.0
[INFO] [stderr]     Checking ndarray-stats v0.3.0
[INFO] [stderr]     Checking cifar-ten v0.1.0
[INFO] [stderr]     Checking wayland-cursor v0.27.0
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking imageproc v0.20.0
[INFO] [stderr]     Checking tsuga v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking hyper v0.13.8
[INFO] [stderr]     Checking hyper-tls v0.4.3
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[INFO] [stderr]     Checking mnist v0.4.1
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/cifar.rs:27:10
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let (mut train_data, train_labels, mut test_data, test_labels) = Cifar10::default()
[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: variable does not need to be mutable
[INFO] [stdout]   --> examples/cifar.rs:27:40
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let (mut train_data, train_labels, mut test_data, test_labels) = Cifar10::default()
[INFO] [stdout]    |                                        ----^^^^^^^^^
[INFO] [stdout]    |                                        |
[INFO] [stdout]    |                                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/test.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     network.train();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/test.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     network.train();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 07s
[INFO] running `Command { std: "docker" "inspect" "2976a5e52277d9396d86187babc279f5194e62be7ce694155d9a52891ad1ded9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2976a5e52277d9396d86187babc279f5194e62be7ce694155d9a52891ad1ded9", kill_on_drop: false }`
[INFO] [stdout] 2976a5e52277d9396d86187babc279f5194e62be7ce694155d9a52891ad1ded9