[INFO] cloning repository https://github.com/kpritam/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/kpritam/rust-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpritam%2Frust-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpritam%2Frust-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 11680acd25d3db288ee030fc05bc0c9fd9108869
[INFO] building kpritam/rust-book against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpritam%2Frust-book" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kpritam/rust-book on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kpritam/rust-book
[INFO] finished tweaking git repo https://github.com/kpritam/rust-book
[INFO] tweaked toml for git repo https://github.com/kpritam/rust-book written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kpritam/rust-book already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26cd3b866ef1c86e8b3f24654858fe63cdf446886daf1a6e0f8f266348fa529f
[INFO] running `Command { std: "docker" "start" "-a" "26cd3b866ef1c86e8b3f24654858fe63cdf446886daf1a6e0f8f266348fa529f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26cd3b866ef1c86e8b3f24654858fe63cdf446886daf1a6e0f8f266348fa529f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26cd3b866ef1c86e8b3f24654858fe63cdf446886daf1a6e0f8f266348fa529f", kill_on_drop: false }`
[INFO] [stdout] 26cd3b866ef1c86e8b3f24654858fe63cdf446886daf1a6e0f8f266348fa529f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09aed84eb02ad5b2b2a1eb76a5de06bb7e0ef749f4f5d756ebd0d1c305990453
[INFO] running `Command { std: "docker" "start" "-a" "09aed84eb02ad5b2b2a1eb76a5de06bb7e0ef749f4f5d756ebd0d1c305990453", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust-book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/ch02_guessing_game.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_guess` is never used
[INFO] [stdout]   --> src/ch02_guessing_game.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn read_guess<F: FromStr>() -> Result<F, F::Err> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_secret` is never used
[INFO] [stdout]   --> src/ch02_guessing_game.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn gen_secret() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]  --> src/ch04_first_word.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn first_word(s: &str) -> &str {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/ch04_first_word.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.85s
[INFO] running `Command { std: "docker" "inspect" "09aed84eb02ad5b2b2a1eb76a5de06bb7e0ef749f4f5d756ebd0d1c305990453", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09aed84eb02ad5b2b2a1eb76a5de06bb7e0ef749f4f5d756ebd0d1c305990453", kill_on_drop: false }`
[INFO] [stdout] 09aed84eb02ad5b2b2a1eb76a5de06bb7e0ef749f4f5d756ebd0d1c305990453
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee57ad96059e621ee2cd55b66437b494897bcfa9873392036c4a062b0350fd36
[INFO] running `Command { std: "docker" "start" "-a" "ee57ad96059e621ee2cd55b66437b494897bcfa9873392036c4a062b0350fd36", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/ch02_guessing_game.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_guess` is never used
[INFO] [stdout]   --> src/ch02_guessing_game.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn read_guess<F: FromStr>() -> Result<F, F::Err> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_secret` is never used
[INFO] [stdout]   --> src/ch02_guessing_game.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn gen_secret() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]  --> src/ch04_first_word.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn first_word(s: &str) -> &str {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/ch04_first_word.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "ee57ad96059e621ee2cd55b66437b494897bcfa9873392036c4a062b0350fd36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee57ad96059e621ee2cd55b66437b494897bcfa9873392036c4a062b0350fd36", kill_on_drop: false }`
[INFO] [stdout] ee57ad96059e621ee2cd55b66437b494897bcfa9873392036c4a062b0350fd36