[INFO] cloning repository https://github.com/LiamHauchard/rust_book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LiamHauchard/rust_book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamHauchard%2Frust_book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamHauchard%2Frust_book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d5d31cee35cb110188792724c79582f2dec1e84
[INFO] testing LiamHauchard/rust_book against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamHauchard%2Frust_book" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LiamHauchard/rust_book 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/LiamHauchard/rust_book
[INFO] finished tweaking git repo https://github.com/LiamHauchard/rust_book
[INFO] tweaked toml for git repo https://github.com/LiamHauchard/rust_book written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/LiamHauchard/rust_book 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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] 57abcddeec333bba8e12c508dc955268593c5bec51f7d9062988231d1d7cb035
[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" "57abcddeec333bba8e12c508dc955268593c5bec51f7d9062988231d1d7cb035", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57abcddeec333bba8e12c508dc955268593c5bec51f7d9062988231d1d7cb035", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57abcddeec333bba8e12c508dc955268593c5bec51f7d9062988231d1d7cb035", kill_on_drop: false }`
[INFO] [stdout] 57abcddeec333bba8e12c508dc955268593c5bec51f7d9062988231d1d7cb035
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] baad22b51234ddec9aba37a863353458c27d58f4d6e912c5dee84744791d4de5
[INFO] running `Command { std: "docker" "start" "-a" "baad22b51234ddec9aba37a863353458c27d58f4d6e912c5dee84744791d4de5", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `days_of_christmas`
[INFO] [stdout]   --> src/chapter_3/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn days_of_christmas() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]  --> src/chapter_4/mod.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn first_word<'a>(s: &str) -> &str {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/chapter_5/mod.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(height: u32, width: u32) -> Rectangle {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `area`
[INFO] [stdout]   --> src/chapter_5/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn area(&self) -> u32 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/chapter_5/mod.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn can_hold(&self, rec: &Rectangle) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "baad22b51234ddec9aba37a863353458c27d58f4d6e912c5dee84744791d4de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "baad22b51234ddec9aba37a863353458c27d58f4d6e912c5dee84744791d4de5", kill_on_drop: false }`
[INFO] [stdout] baad22b51234ddec9aba37a863353458c27d58f4d6e912c5dee84744791d4de5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] b0fb11266606c6a53589c549b1a19aa4e0c20082eea5aa5e7f35593e6803d5f4
[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" "b0fb11266606c6a53589c549b1a19aa4e0c20082eea5aa5e7f35593e6803d5f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `days_of_christmas`
[INFO] [stdout]   --> src/chapter_3/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn days_of_christmas() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]  --> src/chapter_4/mod.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn first_word<'a>(s: &str) -> &str {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/chapter_5/mod.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(height: u32, width: u32) -> Rectangle {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `area`
[INFO] [stdout]   --> src/chapter_5/mod.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn area(&self) -> u32 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/chapter_5/mod.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn can_hold(&self, rec: &Rectangle) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "b0fb11266606c6a53589c549b1a19aa4e0c20082eea5aa5e7f35593e6803d5f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0fb11266606c6a53589c549b1a19aa4e0c20082eea5aa5e7f35593e6803d5f4", kill_on_drop: false }`
[INFO] [stdout] b0fb11266606c6a53589c549b1a19aa4e0c20082eea5aa5e7f35593e6803d5f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 449ad4a4b0f9807f4212d5e0ec816d5b5d05413ce25b51df7ffb749042f15fa8
[INFO] running `Command { std: "docker" "start" "-a" "449ad4a4b0f9807f4212d5e0ec816d5b5d05413ce25b51df7ffb749042f15fa8", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `days_of_christmas`
[INFO] [stderr]   --> src/chapter_3/mod.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn days_of_christmas() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `first_word`
[INFO] [stderr]  --> src/chapter_4/mod.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn first_word<'a>(s: &str) -> &str {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/chapter_5/mod.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new(height: u32, width: u32) -> Rectangle {
[INFO] [stderr]   |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `area`
[INFO] [stderr]   --> src/chapter_5/mod.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn area(&self) -> u32 {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_hold`
[INFO] [stderr]   --> src/chapter_5/mod.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn can_hold(&self, rec: &Rectangle) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_book-7cdb1919c572a9b1
[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" "449ad4a4b0f9807f4212d5e0ec816d5b5d05413ce25b51df7ffb749042f15fa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "449ad4a4b0f9807f4212d5e0ec816d5b5d05413ce25b51df7ffb749042f15fa8", kill_on_drop: false }`
[INFO] [stdout] 449ad4a4b0f9807f4212d5e0ec816d5b5d05413ce25b51df7ffb749042f15fa8