[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] checking LiamHauchard/rust_book against master#4e1f5d90bca45207605a88e39b1f76abcdb85d2f for pr-123962
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamHauchard%2Frust_book" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LiamHauchard/rust_book on toolchain 4e1f5d90bca45207605a88e39b1f76abcdb85d2f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e1f5d90bca45207605a88e39b1f76abcdb85d2f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e1f5d90bca45207605a88e39b1f76abcdb85d2f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking LiamHauchard/rust_book against try#035f40fb95ac1c79b50f07e65650460f3d11e207 for pr-123962
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamHauchard%2Frust_book" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LiamHauchard/rust_book on toolchain 035f40fb95ac1c79b50f07e65650460f3d11e207
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+035f40fb95ac1c79b50f07e65650460f3d11e207" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-tc2/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+035f40fb95ac1c79b50f07e65650460f3d11e207" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+035f40fb95ac1c79b50f07e65650460f3d11e207" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 065d30258aee5e604adad077251ea7033a8ec97d72f4c7d71de1a33a5313b996
[INFO] running `Command { std: "docker" "start" "-a" "065d30258aee5e604adad077251ea7033a8ec97d72f4c7d71de1a33a5313b996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "065d30258aee5e604adad077251ea7033a8ec97d72f4c7d71de1a33a5313b996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "065d30258aee5e604adad077251ea7033a8ec97d72f4c7d71de1a33a5313b996", kill_on_drop: false }`
[INFO] [stdout] 065d30258aee5e604adad077251ea7033a8ec97d72f4c7d71de1a33a5313b996
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+035f40fb95ac1c79b50f07e65650460f3d11e207" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce8212bf6e45bcfe5bf9249466d3bd6a27690100dfd44db3214e9f1749ea42f0
[INFO] running `Command { std: "docker" "start" "-a" "ce8212bf6e45bcfe5bf9249466d3bd6a27690100dfd44db3214e9f1749ea42f0", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `days_of_christmas` is never used
[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 `first_word` is never used
[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: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/chapter_5/mod.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Rectangle {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `days_of_christmas` is never used
[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: associated items `new`, `area`, and `can_hold` are never used
[INFO] [stdout]   --> src/chapter_5/mod.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 8  |     pub fn new(height: u32, width: u32) -> Rectangle {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn area(&self) -> u32 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn can_hold(&self, rec: &Rectangle) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[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: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/chapter_5/mod.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Rectangle {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `area`, and `can_hold` are never used
[INFO] [stdout]   --> src/chapter_5/mod.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 8  |     pub fn new(height: u32, width: u32) -> Rectangle {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn area(&self) -> u32 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn can_hold(&self, rec: &Rectangle) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "ce8212bf6e45bcfe5bf9249466d3bd6a27690100dfd44db3214e9f1749ea42f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce8212bf6e45bcfe5bf9249466d3bd6a27690100dfd44db3214e9f1749ea42f0", kill_on_drop: false }`
[INFO] [stdout] ce8212bf6e45bcfe5bf9249466d3bd6a27690100dfd44db3214e9f1749ea42f0