[INFO] cloning repository https://github.com/Saber-Kurama/hello-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Saber-Kurama/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaber-Kurama%2Fhello-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaber-Kurama%2Fhello-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0052c18466b923dfcca15083ce2cbbde06004208
[INFO] checking Saber-Kurama/hello-rust against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaber-Kurama%2Fhello-rust" "/workspace/builds/worker-39/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-39/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Saber-Kurama/hello-rust on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Saber-Kurama/hello-rust
[INFO] finished tweaking git repo https://github.com/Saber-Kurama/hello-rust
[INFO] tweaked toml for git repo https://github.com/Saber-Kurama/hello-rust written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] crate git repo https://github.com/Saber-Kurama/hello-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ferris-says v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b84a6b8762d3514fc4e29c9ea3d6fb5a46453d693da37f594bf5cf6263edbfc
[INFO] running `Command { std: "docker" "start" "-a" "5b84a6b8762d3514fc4e29c9ea3d6fb5a46453d693da37f594bf5cf6263edbfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b84a6b8762d3514fc4e29c9ea3d6fb5a46453d693da37f594bf5cf6263edbfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b84a6b8762d3514fc4e29c9ea3d6fb5a46453d693da37f594bf5cf6263edbfc", kill_on_drop: false }`
[INFO] [stdout] 5b84a6b8762d3514fc4e29c9ea3d6fb5a46453d693da37f594bf5cf6263edbfc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cbe4c4585d4fecbf9a9113e1c47672bf99aaa77f3fefbe394fad5259c1412e89
[INFO] running `Command { std: "docker" "start" "-a" "cbe4c4585d4fecbf9a9113e1c47672bf99aaa77f3fefbe394fad5259c1412e89", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking smawk v0.3.1
[INFO] [stderr]     Checking smallvec v0.4.5
[INFO] [stderr]     Checking textwrap v0.13.4
[INFO] [stderr]     Checking ferris-says v0.2.1
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/main.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn takes_ownership(some_string: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> src/main.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn makes_copy(some_interger: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length`
[INFO] [stdout]   --> src/main.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn calculate_length(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]    --> src/main.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn change(some_string: &mut String) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/main.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn takes_ownership(some_string: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> src/main.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn makes_copy(some_interger: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length`
[INFO] [stdout]   --> src/main.rs:91:4
[INFO] [stdout]    |
[INFO] [stdout] 91 | fn calculate_length(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]    --> src/main.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn change(some_string: &mut String) {
[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 [unoptimized + debuginfo] target(s) in 3.44s
[INFO] running `Command { std: "docker" "inspect" "cbe4c4585d4fecbf9a9113e1c47672bf99aaa77f3fefbe394fad5259c1412e89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbe4c4585d4fecbf9a9113e1c47672bf99aaa77f3fefbe394fad5259c1412e89", kill_on_drop: false }`
[INFO] [stdout] cbe4c4585d4fecbf9a9113e1c47672bf99aaa77f3fefbe394fad5259c1412e89