[INFO] cloning repository https://github.com/Mattsi-Jansky/rust-restore-ip-addresses
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Mattsi-Jansky/rust-restore-ip-addresses" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMattsi-Jansky%2Frust-restore-ip-addresses", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMattsi-Jansky%2Frust-restore-ip-addresses'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d4c7215e6408ea8b1ce3af9d8c4c7c981bccf38
[INFO] checking Mattsi-Jansky/rust-restore-ip-addresses against try#0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9 for pr-147185
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMattsi-Jansky%2Frust-restore-ip-addresses" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Mattsi-Jansky/rust-restore-ip-addresses
[INFO] finished tweaking git repo https://github.com/Mattsi-Jansky/rust-restore-ip-addresses
[INFO] tweaked toml for git repo https://github.com/Mattsi-Jansky/rust-restore-ip-addresses written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Mattsi-Jansky/rust-restore-ip-addresses on toolchain 0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Mattsi-Jansky/rust-restore-ip-addresses 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" "+0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded test-case-macros v2.2.1
[INFO] [stderr]   Downloaded test-case v2.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee409b2dcdb6eda718f314998be69f429d1f967f10f1a59c89531cf16fcd893a
[INFO] running `Command { std: "docker" "start" "-a" "ee409b2dcdb6eda718f314998be69f429d1f967f10f1a59c89531cf16fcd893a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee409b2dcdb6eda718f314998be69f429d1f967f10f1a59c89531cf16fcd893a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee409b2dcdb6eda718f314998be69f429d1f967f10f1a59c89531cf16fcd893a", kill_on_drop: false }`
[INFO] [stdout] ee409b2dcdb6eda718f314998be69f429d1f967f10f1a59c89531cf16fcd893a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+0de49ae9e81f9a1e7df6f0783824ce94ed18e8a9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0e2c82412e575eb7be91b54addec1fa74b314ab1384e599f41973ca0e8b2583
[INFO] running `Command { std: "docker" "start" "-a" "e0e2c82412e575eb7be91b54addec1fa74b314ab1384e599f41973ca0e8b2583", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.100
[INFO] [stderr]     Checking restore-ip-address v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/lib.rs:34:37
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let next_char = &s.as_str()[(current_index..current_index + 1)];
[INFO] [stdout]    |                                     ^                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 34 -         let next_char = &s.as_str()[(current_index..current_index + 1)];
[INFO] [stdout] 34 +         let next_char = &s.as_str()[current_index..current_index + 1 ];
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/lib.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let mut result = String::new();
[INFO] [stdout]   |             ----^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidate`
[INFO] [stdout]   --> src/lib.rs:25:22
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn extract_block(candidate: &String) -> &str {
[INFO] [stdout]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_candidate`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling test-case-macros v2.2.1
[INFO] [stderr]     Checking test-case v2.2.1
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/lib.rs:34:37
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let next_char = &s.as_str()[(current_index..current_index + 1)];
[INFO] [stdout]    |                                     ^                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 34 -         let next_char = &s.as_str()[(current_index..current_index + 1)];
[INFO] [stdout] 34 +         let next_char = &s.as_str()[current_index..current_index + 1 ];
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/lib.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let mut result = String::new();
[INFO] [stdout]   |             ----^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `candidate`
[INFO] [stdout]   --> src/lib.rs:25:22
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn extract_block(candidate: &String) -> &str {
[INFO] [stdout]    |                      ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_candidate`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.07s
[INFO] running `Command { std: "docker" "inspect" "e0e2c82412e575eb7be91b54addec1fa74b314ab1384e599f41973ca0e8b2583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0e2c82412e575eb7be91b54addec1fa74b314ab1384e599f41973ca0e8b2583", kill_on_drop: false }`
[INFO] [stdout] e0e2c82412e575eb7be91b54addec1fa74b314ab1384e599f41973ca0e8b2583