[INFO] cloning repository https://github.com/zhangaz1/TheRustProgrammingLanguageBookExamples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zhangaz1/TheRustProgrammingLanguageBookExamples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhangaz1%2FTheRustProgrammingLanguageBookExamples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhangaz1%2FTheRustProgrammingLanguageBookExamples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e201eb3f6b6dc3622e535f5ae1a33ae2e06267f6
[INFO] testing zhangaz1/TheRustProgrammingLanguageBookExamples against master#61469b682c2b0bf9cebc4622f1859e2bb3b7ebca for pr-91743
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhangaz1%2FTheRustProgrammingLanguageBookExamples" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zhangaz1/TheRustProgrammingLanguageBookExamples on toolchain 61469b682c2b0bf9cebc4622f1859e2bb3b7ebca
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+61469b682c2b0bf9cebc4622f1859e2bb3b7ebca" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zhangaz1/TheRustProgrammingLanguageBookExamples
[INFO] finished tweaking git repo https://github.com/zhangaz1/TheRustProgrammingLanguageBookExamples
[INFO] tweaked toml for git repo https://github.com/zhangaz1/TheRustProgrammingLanguageBookExamples written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/zhangaz1/TheRustProgrammingLanguageBookExamples already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+61469b682c2b0bf9cebc4622f1859e2bb3b7ebca" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+61469b682c2b0bf9cebc4622f1859e2bb3b7ebca" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 16278f8583c0244b0baed30b3969f6e3d925041a05b208d5d403939d8778d847
[INFO] running `Command { std: "docker" "start" "-a" "16278f8583c0244b0baed30b3969f6e3d925041a05b208d5d403939d8778d847", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16278f8583c0244b0baed30b3969f6e3d925041a05b208d5d403939d8778d847", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16278f8583c0244b0baed30b3969f6e3d925041a05b208d5d403939d8778d847", kill_on_drop: false }`
[INFO] [stdout] 16278f8583c0244b0baed30b3969f6e3d925041a05b208d5d403939d8778d847
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+61469b682c2b0bf9cebc4622f1859e2bb3b7ebca" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89360081f21fe9df0d536f9e519795307f1febd98b17b39d958ea618f39ff7c1
[INFO] running `Command { std: "docker" "start" "-a" "89360081f21fe9df0d536f9e519795307f1febd98b17b39d958ea618f39ff7c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling TheRustProgrammingLanguageBookExamples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]  --> src/main.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let y = &x[0];
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `TheRustProgrammingLanguageBookExamples` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `the_rust_programming_language_book_examples`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "89360081f21fe9df0d536f9e519795307f1febd98b17b39d958ea618f39ff7c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89360081f21fe9df0d536f9e519795307f1febd98b17b39d958ea618f39ff7c1", kill_on_drop: false }`
[INFO] [stdout] 89360081f21fe9df0d536f9e519795307f1febd98b17b39d958ea618f39ff7c1