[INFO] updating cached repository https://github.com/LiamHauchard/rust_book
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/LiamHauchard/rust_book
[INFO] [stderr]    7bca321..3225e3c  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3225e3c88d1f2dbf4730cc19782fbf31fb77d984
[INFO] testing LiamHauchard/rust_book against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamHauchard%2Frust_book" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LiamHauchard/rust_book on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-10/source/Cargo.toml
[INFO] crate git repo https://github.com/LiamHauchard/rust_book already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stdout] 7f92683e9f7a1ce9b3998b9da7f40e8f7b6b2e63749a6b4af84e922cffeaa10f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "7f92683e9f7a1ce9b3998b9da7f40e8f7b6b2e63749a6b4af84e922cffeaa10f"`
[INFO] [stderr]    Compiling rust_book v0.1.0 (/opt/rustwide/workdir)
[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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `"docker" "inspect" "7f92683e9f7a1ce9b3998b9da7f40e8f7b6b2e63749a6b4af84e922cffeaa10f"`
[INFO] running `"docker" "rm" "-f" "7f92683e9f7a1ce9b3998b9da7f40e8f7b6b2e63749a6b4af84e922cffeaa10f"`
[INFO] [stdout] 7f92683e9f7a1ce9b3998b9da7f40e8f7b6b2e63749a6b4af84e922cffeaa10f
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0c25609c42636a983ecc96afb57fb263a21d916233048ee8f0ffe17a204d1bd3
[INFO] running `"docker" "start" "-a" "0c25609c42636a983ecc96afb57fb263a21d916233048ee8f0ffe17a204d1bd3"`
[INFO] [stderr]    Compiling rust_book v0.1.0 (/opt/rustwide/workdir)
[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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "0c25609c42636a983ecc96afb57fb263a21d916233048ee8f0ffe17a204d1bd3"`
[INFO] running `"docker" "rm" "-f" "0c25609c42636a983ecc96afb57fb263a21d916233048ee8f0ffe17a204d1bd3"`
[INFO] [stdout] 0c25609c42636a983ecc96afb57fb263a21d916233048ee8f0ffe17a204d1bd3
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen"`
[INFO] [stdout] 3b3512dd02dcdc11eded5b8089ca60a85a4d1e6243eab4672d036f4dcf6b7455
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "3b3512dd02dcdc11eded5b8089ca60a85a4d1e6243eab4672d036f4dcf6b7455"`
[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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_book-08d8297c2c10b1ba
[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 `"docker" "inspect" "3b3512dd02dcdc11eded5b8089ca60a85a4d1e6243eab4672d036f4dcf6b7455"`
[INFO] running `"docker" "rm" "-f" "3b3512dd02dcdc11eded5b8089ca60a85a4d1e6243eab4672d036f4dcf6b7455"`
[INFO] [stdout] 3b3512dd02dcdc11eded5b8089ca60a85a4d1e6243eab4672d036f4dcf6b7455