[INFO] fetching crate tensorboard-rs 0.2.4...
[INFO] checking tensorboard-rs-0.2.4 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate tensorboard-rs 0.2.4 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate tensorboard-rs 0.2.4 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tensorboard-rs 0.2.4
[INFO] finished tweaking crates.io crate tensorboard-rs 0.2.4
[INFO] tweaked toml for crates.io crate tensorboard-rs 0.2.4 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate tensorboard-rs 0.2.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded blas-src v0.2.1
[INFO] [stderr]   Downloaded blas-src v0.3.0
[INFO] [stderr]   Downloaded lapacke v0.2.0
[INFO] [stderr]   Downloaded auto-diff v0.3.3
[INFO] [stderr]   Downloaded lapacke-sys v0.1.4
[INFO] [stderr]   Downloaded cblas-sys v0.1.4
[INFO] [stderr]   Downloaded protobuf v2.14.0
[INFO] [stderr]   Downloaded lapack-src v0.3.0
[INFO] [stderr]   Downloaded ndarray-linalg v0.11.1
[INFO] [stderr]   Downloaded cauchy v0.2.2
[INFO] [stderr]   Downloaded protobuf-codegen v2.14.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6349d07c742cb76b1b2512d8e613f0cb9ca4922a10f8cc0691d8503fd5f65933
[INFO] running `Command { std: "docker" "start" "-a" "6349d07c742cb76b1b2512d8e613f0cb9ca4922a10f8cc0691d8503fd5f65933", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6349d07c742cb76b1b2512d8e613f0cb9ca4922a10f8cc0691d8503fd5f65933", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6349d07c742cb76b1b2512d8e613f0cb9ca4922a10f8cc0691d8503fd5f65933", kill_on_drop: false }`
[INFO] [stdout] 6349d07c742cb76b1b2512d8e613f0cb9ca4922a10f8cc0691d8503fd5f65933
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a2082e508e69d7e62ccc76c3817a70c5f86b71f6081296ef6320ae5e3bd6830e
[INFO] running `Command { std: "docker" "start" "-a" "a2082e508e69d7e62ccc76c3817a70c5f86b71f6081296ef6320ae5e3bd6830e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
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[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
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[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]    Compiling ndarray v0.12.1
[INFO] [stderr]     Checking blas-src v0.2.1
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking blas-src v0.3.0
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[INFO] [stderr]     Checking cauchy v0.2.2
[INFO] [stderr]     Checking ndarray-linalg v0.11.1
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[INFO] [stderr]     Checking tensorboard-rs v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/summary.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/summary.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `layout`
[INFO] [stdout]   --> src/summary.rs:81:23
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn custom_scalars(layout: f32) {
[INFO] [stdout]    |                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_layout`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `layout`
[INFO] [stdout]   --> src/summary.rs:81:23
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn custom_scalars(layout: f32) {
[INFO] [stdout]    |                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_layout`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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] [stdout] warning: unused import: `open`
[INFO] [stdout]  --> examples/draw_histo.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use image::{open, };
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 24.41s
[INFO] running `Command { std: "docker" "inspect" "a2082e508e69d7e62ccc76c3817a70c5f86b71f6081296ef6320ae5e3bd6830e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2082e508e69d7e62ccc76c3817a70c5f86b71f6081296ef6320ae5e3bd6830e", kill_on_drop: false }`
[INFO] [stdout] a2082e508e69d7e62ccc76c3817a70c5f86b71f6081296ef6320ae5e3bd6830e