[INFO] cloning repository https://github.com/iamazy/rust-cookbook-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iamazy/rust-cookbook-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamazy%2Frust-cookbook-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamazy%2Frust-cookbook-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6f440cc675b9c6907baa7bfbde067d26d0b5ebf4
[INFO] testing iamazy/rust-cookbook-code against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamazy%2Frust-cookbook-code" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iamazy/rust-cookbook-code on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iamazy/rust-cookbook-code
[INFO] finished tweaking git repo https://github.com/iamazy/rust-cookbook-code
[INFO] tweaked toml for git repo https://github.com/iamazy/rust-cookbook-code written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/iamazy/rust-cookbook-code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", 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] 15410ae175dc17ab55491e222d77d8c6a9fdd189b08886402b61f5a6f8c392e4
[INFO] running `Command { std: "docker" "start" "-a" "15410ae175dc17ab55491e222d77d8c6a9fdd189b08886402b61f5a6f8c392e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15410ae175dc17ab55491e222d77d8c6a9fdd189b08886402b61f5a6f8c392e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15410ae175dc17ab55491e222d77d8c6a9fdd189b08886402b61f5a6f8c392e4", kill_on_drop: false }`
[INFO] [stdout] 15410ae175dc17ab55491e222d77d8c6a9fdd189b08886402b61f5a6f8c392e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1852bf4b23720e59cc6dbae51e5e9e2d5472799213e34a032a4039bef0beee2a
[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" "1852bf4b23720e59cc6dbae51e5e9e2d5472799213e34a032a4039bef0beee2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling protobuf v2.0.6
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling arc-swap v0.4.5
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling quick-error v1.2.3
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[INFO] [stderr]    Compiling bytemuck v1.2.0
[INFO] [stderr]    Compiling untrusted v0.7.0
[INFO] [stderr]    Compiling same-file v1.0.6
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[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
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[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
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[INFO] [stderr]    Compiling num-iter v0.1.40
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[INFO] [stderr]    Compiling miniz_oxide v0.3.6
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[INFO] [stderr]    Compiling bitflags v1.2.1
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[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling tiff v0.4.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling slog-scope v4.3.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling filetime v0.2.8
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling flate2 v1.0.13
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling ring v0.16.11
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling crossbeam-channel v0.4.2
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling png v0.15.3
[INFO] [stderr]    Compiling slog-stdlog v3.0.5
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]    Compiling term v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling regex v1.3.6
[INFO] [stderr]    Compiling slog-async v2.5.0
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling backtrace v0.3.44
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling slog-stdlog v4.0.0
[INFO] [stderr]    Compiling slog-term v2.5.0
[INFO] [stderr]    Compiling rayon v1.3.0
[INFO] [stderr]    Compiling rand_distr v0.2.2
[INFO] [stderr]    Compiling slog-envlogger v2.2.0
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling getset v0.0.7
[INFO] [stderr]    Compiling protobuf-codegen v2.0.6
[INFO] [stderr]    Compiling jpeg-decoder v0.1.18
[INFO] [stderr]    Compiling protobuf-build v0.8.0
[INFO] [stderr]    Compiling image v0.23.0
[INFO] [stderr]    Compiling raft-proto v0.6.0-alpha
[INFO] [stderr]    Compiling raft v0.6.0-alpha
[INFO] [stderr]    Compiling rust-cookbook-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs::create_dir_all`
[INFO] [stdout]  --> src/concurrency/parallel_tasks.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::create_dir_all;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `bail`
[INFO] [stdout]  --> src/concurrency/parallel_tasks.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 | use anyhow::{bail, Error, Result};
[INFO] [stdout]   |              ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MatchOptions`, `glob_with`
[INFO] [stdout]  --> src/concurrency/parallel_tasks.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | use glob::{glob_with, MatchOptions};
[INFO] [stdout]   |            ^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/concurrency/parallel_tasks.rs:76:17
[INFO] [stdout]    |
[INFO] [stdout] 76 |                 (x + y)
[INFO] [stdout]    |                 ^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error_chain::ChainedError`
[INFO] [stdout]  --> src/concurrency/parallel_tasks.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use error_chain::ChainedError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decompress_tarball`
[INFO] [stdout]   --> src/compress/mod.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn decompress_tarball() -> Result<(), std::io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decompress_tarball2`
[INFO] [stdout]   --> src/compress/mod.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn decompress_tarball2() -> Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `draw_fractal`
[INFO] [stdout]    --> src/concurrency/explicit_threads.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 | pub fn draw_fractal() -> Result<(), RecvError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `julia`
[INFO] [stdout]    --> src/concurrency/explicit_threads.rs:159:4
[INFO] [stdout]     |
[INFO] [stdout] 159 | fn julia(c: Complex<f32>, x: u32, y: u32, width: u32, height: u32, max_iter: u32) -> u32 {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `normalize`
[INFO] [stdout]    --> src/concurrency/explicit_threads.rs:179:4
[INFO] [stdout]     |
[INFO] [stdout] 179 | fn normalize(color: f32, factor: f32) -> u8 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `wavelength_to_rgb`
[INFO] [stdout]    --> src/concurrency/explicit_threads.rs:183:4
[INFO] [stdout]     |
[INFO] [stdout] 183 | fn wavelength_to_rgb(wavelength: u32) -> Rgb<u8> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_thumbnail`
[INFO] [stdout]    --> src/concurrency/parallel_tasks.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn make_thumbnail<PA, PB>(original: PA, thumb_dir: PB, long_edge: u32) -> Result<()>
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 01s
[INFO] running `Command { std: "docker" "inspect" "1852bf4b23720e59cc6dbae51e5e9e2d5472799213e34a032a4039bef0beee2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1852bf4b23720e59cc6dbae51e5e9e2d5472799213e34a032a4039bef0beee2a", kill_on_drop: false }`
[INFO] [stdout] 1852bf4b23720e59cc6dbae51e5e9e2d5472799213e34a032a4039bef0beee2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--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] d37c01491bf78d9f22a44cd50614060b0a8126ea858413bbde1c7d2c61ed1d7e
[INFO] running `Command { std: "docker" "start" "-a" "d37c01491bf78d9f22a44cd50614060b0a8126ea858413bbde1c7d2c61ed1d7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-cookbook-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs::create_dir_all`
[INFO] [stdout]  --> src/concurrency/parallel_tasks.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::create_dir_all;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `bail`
[INFO] [stdout]  --> src/concurrency/parallel_tasks.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 | use anyhow::{bail, Error, Result};
[INFO] [stdout]   |              ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MatchOptions`, `glob_with`
[INFO] [stdout]  --> src/concurrency/parallel_tasks.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | use glob::{glob_with, MatchOptions};
[INFO] [stdout]   |            ^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/concurrency/parallel_tasks.rs:76:17
[INFO] [stdout]    |
[INFO] [stdout] 76 |                 (x + y)
[INFO] [stdout]    |                 ^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error_chain::ChainedError`
[INFO] [stdout]  --> src/concurrency/parallel_tasks.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use error_chain::ChainedError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decompress_tarball`
[INFO] [stdout]   --> src/compress/mod.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn decompress_tarball() -> Result<(), std::io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decompress_tarball2`
[INFO] [stdout]   --> src/compress/mod.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn decompress_tarball2() -> Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `draw_fractal`
[INFO] [stdout]    --> src/concurrency/explicit_threads.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 | pub fn draw_fractal() -> Result<(), RecvError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `julia`
[INFO] [stdout]    --> src/concurrency/explicit_threads.rs:159:4
[INFO] [stdout]     |
[INFO] [stdout] 159 | fn julia(c: Complex<f32>, x: u32, y: u32, width: u32, height: u32, max_iter: u32) -> u32 {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `normalize`
[INFO] [stdout]    --> src/concurrency/explicit_threads.rs:179:4
[INFO] [stdout]     |
[INFO] [stdout] 179 | fn normalize(color: f32, factor: f32) -> u8 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `wavelength_to_rgb`
[INFO] [stdout]    --> src/concurrency/explicit_threads.rs:183:4
[INFO] [stdout]     |
[INFO] [stdout] 183 | fn wavelength_to_rgb(wavelength: u32) -> Rgb<u8> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_thumbnail`
[INFO] [stdout]    --> src/concurrency/parallel_tasks.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn make_thumbnail<PA, PB>(original: PA, thumb_dir: PB, long_edge: u32) -> Result<()>
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.64s
[INFO] running `Command { std: "docker" "inspect" "d37c01491bf78d9f22a44cd50614060b0a8126ea858413bbde1c7d2c61ed1d7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d37c01491bf78d9f22a44cd50614060b0a8126ea858413bbde1c7d2c61ed1d7e", kill_on_drop: false }`
[INFO] [stdout] d37c01491bf78d9f22a44cd50614060b0a8126ea858413bbde1c7d2c61ed1d7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 36c8814ec4cb97aea20030c98d7d0de8ae755d008a3d63846609e0934391eece
[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" "36c8814ec4cb97aea20030c98d7d0de8ae755d008a3d63846609e0934391eece", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::fs::create_dir_all`
[INFO] [stderr]  --> src/concurrency/parallel_tasks.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fs::create_dir_all;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Error`, `bail`
[INFO] [stderr]  --> src/concurrency/parallel_tasks.rs:7:14
[INFO] [stderr]   |
[INFO] [stderr] 7 | use anyhow::{bail, Error, Result};
[INFO] [stderr]   |              ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `MatchOptions`, `glob_with`
[INFO] [stderr]  --> src/concurrency/parallel_tasks.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | use glob::{glob_with, MatchOptions};
[INFO] [stderr]   |            ^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/concurrency/parallel_tasks.rs:76:17
[INFO] [stderr]    |
[INFO] [stderr] 76 |                 (x + y)
[INFO] [stderr]    |                 ^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `error_chain::ChainedError`
[INFO] [stderr]  --> src/concurrency/parallel_tasks.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use error_chain::ChainedError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decompress_tarball`
[INFO] [stderr]   --> src/compress/mod.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn decompress_tarball() -> Result<(), std::io::Error> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decompress_tarball2`
[INFO] [stderr]   --> src/compress/mod.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn decompress_tarball2() -> Result<()> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `draw_fractal`
[INFO] [stderr]    --> src/concurrency/explicit_threads.rs:130:8
[INFO] [stderr]     |
[INFO] [stderr] 130 | pub fn draw_fractal() -> Result<(), RecvError> {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `julia`
[INFO] [stderr]    --> src/concurrency/explicit_threads.rs:159:4
[INFO] [stderr]     |
[INFO] [stderr] 159 | fn julia(c: Complex<f32>, x: u32, y: u32, width: u32, height: u32, max_iter: u32) -> u32 {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `normalize`
[INFO] [stderr]    --> src/concurrency/explicit_threads.rs:179:4
[INFO] [stderr]     |
[INFO] [stderr] 179 | fn normalize(color: f32, factor: f32) -> u8 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `wavelength_to_rgb`
[INFO] [stderr]    --> src/concurrency/explicit_threads.rs:183:4
[INFO] [stderr]     |
[INFO] [stderr] 183 | fn wavelength_to_rgb(wavelength: u32) -> Rgb<u8> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_thumbnail`
[INFO] [stderr]    --> src/concurrency/parallel_tasks.rs:123:4
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn make_thumbnail<PA, PB>(original: PA, thumb_dir: PB, long_edge: u32) -> Result<()>
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.21s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_cookbook_code-ecef5501262cd26f
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "36c8814ec4cb97aea20030c98d7d0de8ae755d008a3d63846609e0934391eece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36c8814ec4cb97aea20030c98d7d0de8ae755d008a3d63846609e0934391eece", kill_on_drop: false }`
[INFO] [stdout] 36c8814ec4cb97aea20030c98d7d0de8ae755d008a3d63846609e0934391eece